WO2023109279A1 - 一种光传输设备和系统 - Google Patents

一种光传输设备和系统 Download PDF

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Publication number
WO2023109279A1
WO2023109279A1 PCT/CN2022/124627 CN2022124627W WO2023109279A1 WO 2023109279 A1 WO2023109279 A1 WO 2023109279A1 CN 2022124627 W CN2022124627 W CN 2022124627W WO 2023109279 A1 WO2023109279 A1 WO 2023109279A1
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Prior art keywords
light
false
signal light
optical
optical power
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PCT/CN2022/124627
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English (en)
French (fr)
Inventor
王步云
钟健
罗俊
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华为技术有限公司
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Publication of WO2023109279A1 publication Critical patent/WO2023109279A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation

Definitions

  • the embodiments of the present application relate to the field of optical access and optical transmission network technologies, and more specifically, to an optical transmission device and system.
  • the fifth generation mobile communication technology (5th generation mobile communication technology, 5G), augmented reality (augmented reality, AR), virtual reality (virtual reality, VR), cloud computing, high-definition video and the Internet of Things, etc.
  • 5G fifth generation mobile communication technology
  • AR augmented reality
  • VR virtual reality
  • cloud computing high-definition video and the Internet of Things
  • WDM wavelength division multiplexing
  • the optical power is transferred with different wavelengths. Therefore, when the power of the wavelength or the combination of wavelength channels changes, the Raman effect The resulting spectral tilt changes, which in turn leads to degradation of signal optical power flatness in different wavelength channels of the WDM transmission system. Especially for the fast passive wave drop caused by system failure, if it cannot respond in time, it will cause system performance degradation, resulting in burst bit errors.
  • SRS stimulated Raman scattering
  • Embodiments of the present application provide an optical transmission device and system, which can maintain a stable Raman gain of the system and improve the stability of system performance.
  • an optical transmission device which includes: a first dummy light generating module, a first dummy light filling module, a control module, a second dummy light generating module, and a second dummy light filling module, the first dummy light filling module A false light generating module, used to generate the first false light; the second false light generating module, used to generate the second false light; the first false light filling module, used to receive the first input signal light and the The first false light, processing the first input signal light and the first false light and generating a first output signal light;
  • the relationship between the reference value determining the optical power of the input light of the first dummy light filling module and/or the amplification gain of the first dummy light filling module, so that the optical power of the first output signal light is equal to the A first reference value, the first reference value corresponds to the setting of the optical power when the first output signal light works in a full-wave state and the optical signals of each wavelength in the first output signal light
  • control module is also used to obtain the optical power of the first output signal light, for example, the optical power of the first output signal light may be detected by a photodetector, and the control module obtains the The optical power of the first output signal light detected by the detector.
  • the present application uses the power filling of the first false light filling module to ensure the stability of the optical power at the input end of the second false light filling module, so that the Raman gain of the second output signal light is kept stable when it is transmitted through the downstream optical fiber.
  • the first dummy optical filling module includes: a first amplifier and a first dummy optical combiner, and the first dummy optical combiner is configured to receive the The first input signal light and the first dummy light, adjusting the input optical power of the first input signal light and the first dummy light according to the optical power of the input light of the first dummy light filling module, generating first coupled signal light; the first amplifier is configured to amplify the first coupled signal light to generate the first output signal light according to the amplification gain of the first dummy light filling module.
  • the first dummy optical filling module includes: a first amplifier and a first dummy optical combiner, and the first amplifier is configured to The amplification gain of the false light filling module is used to amplify the first input signal light to generate the first amplified signal light; the first false light combiner is used to receive the first amplified signal light and the first false light, According to the optical power of the input light of the first dummy light filling module, the input optical power of the first amplified signal light and the first dummy light is adjusted to generate the first output signal light.
  • the first false light filling module includes: a first amplifier, the first amplifier includes an input stage of the first amplifier and the first amplifier The output stage of the first amplifier, the input stage of the first amplifier, is used to receive the first input signal light, and generate spontaneous emission light with preset optical power according to the optical power of the first input signal light, and the first The output stage of the amplifier is configured to amplify the first input signal light and the spontaneous emission light according to the amplification gain of the first false light filling module to generate the first output signal light.
  • the first dummy optical filling module includes: a first amplifier and a first dummy optical combiner, and the first amplifier includes an input of the first amplifier stage and the output stage of the first amplifier, and the input stage of the first amplifier, are used to amplify the first input signal light to generate the first amplified signal light according to the amplification gain of the first false light filling module;
  • the first dummy light combiner is configured to receive the first amplified signal light and the first dummy light, and adjust the first amplified signal according to the optical power of the input light of the first dummy light filling module light and the input optical power of the first false light to generate a first coupled signal light;
  • the output stage of the first amplifier is used to amplify the first coupled signal light according to the amplification gain of the first false light filling module The signal light generates the first output signal light.
  • the control module when the optical power of the first output signal light is less than the first reference value, the control module is specifically configured to increase the first light The amplification gain of the amplifier enables the first optical amplifier to work in an automatic optical power locking state.
  • control module is further configured to increase the optical power of the first dummy light input by the first dummy optical combiner.
  • control module is further configured to: determine that the absolute value of the difference between the optical power of the first input signal light and a second reference value is greater than a first threshold,
  • the first threshold value corresponds to the maximum adjustment amount of the gain of the first optical amplifier, and the second reference value corresponds to the full-wave state of the first input signal light and the wavelength of each wavelength in the first input signal light
  • the setting range of the optical power when the optical signal works in the normal state.
  • control module is also used to acquire the optical power of the first input signal light, for example, the optical power of the first input signal light may be detected by a photodetector, and the control module acquires the The optical power of the first input signal light detected by the detector.
  • the control module controls the gain of the first amplifier to the maximum adjustment amount, the optical power of the first input light is less than the second reference value, that is, the optical power of the first input signal light is equal to the second reference value The difference is negative.
  • control module when the optical power of the first output signal light is greater than the first reference value, the control module is specifically configured to reduce the first false The optical power of the first false light input by the optical combiner.
  • control module is further configured to reduce the amplification gain of the first optical amplifier, so that the first optical amplifier works in an automatic optical power locking state.
  • control module is further configured to: determine that the absolute value of the difference between the optical power of the first input signal light and a second reference value is greater than a first threshold,
  • the first threshold value corresponds to the adjustment of the attenuation of the optical power of the first false light by the first false light filling module to a maximum value
  • the second reference value corresponds to the operation of the first input signal light in a full-wave state
  • the setting range of the optical power when the optical signals of each wavelength in the first input signal light work in a normal state.
  • the control module controls the first false optical combiner to adjust the attenuation of the optical power of the first false light to a maximum value
  • the optical power of the first input light is greater than the second reference value, that is, The difference between the optical power of the first input signal light and the second reference value is positive.
  • the device further includes: a third false light generating module, a third false light filling module, and the third false light generating module is configured to generate a third False light; the third false light filling module is used to receive the second input signal light and the third false light, process the second input signal light and the third false light and generate a third output signal light
  • the control module is further configured to determine the optical power of the input light of the third false light filling module and/or the third reference value according to the relationship between the optical power of the third output signal light and the third reference value.
  • the amplification gain of the false light filling module so that the optical power of the third output signal light is equal to the third reference value, and the third reference value corresponds to the operation of the third output signal light in a full-wave state, and the The setting range of the optical power of the optical signals of each wavelength in the third output signal light is working in a normal state.
  • the optical transmission device provided by the present application can be applied to a wavelength division multiplexing system of signal light in two or more bands, so that the Raman gain of the signal is kept stable when the signal is transmitted in the downstream optical fiber.
  • the second dummy light filling module is further configured to receive the third output signal light, and control the input signal according to the wavelength range of the third output signal light The wavelength range of the second dummy light, so that the wavelength range of the fourth output signal light remains unchanged, and the transmission direction of the first output signal light is the same as that of the third output signal light.
  • the device further includes: a fourth false light generating module, configured to generate fourth false light; the second The false light filling module is also used to receive the third output signal light, and control the wavelength range of the input fourth false light according to the wavelength range of the third output signal light, so that the wavelength of the fourth output signal light The range remains unchanged, and the transmission directions of the first output signal light and the third output signal light are opposite.
  • a fourth false light generating module configured to generate fourth false light
  • the second The false light filling module is also used to receive the third output signal light, and control the wavelength range of the input fourth false light according to the wavelength range of the third output signal light, so that the wavelength of the fourth output signal light The range remains unchanged, and the transmission directions of the first output signal light and the third output signal light are opposite.
  • the third dummy optical filling module includes: a second amplifier and a second dummy optical combiner, and the second dummy optical combiner is configured to receive the The second input signal light and the third dummy light, adjusting the input optical power of the second input signal light and the third dummy light according to the optical power of the input light of the third dummy light filling module, generating second coupled signal light; the second amplifier is configured to amplify the second coupled signal light to generate the third output signal light according to the amplification gain of the third dummy light filling module.
  • the third dummy optical filling module includes: a second amplifier and a second dummy optical combiner, the second amplifier is configured to The amplification gain of the false light filling module is used to amplify the second input signal light to generate a second amplified signal light; the second false light combiner is used to receive the second amplified signal light and the third false light, According to the optical power of the input light of the third dummy light filling module, the input optical power of the second amplified signal light and the third dummy light is adjusted to generate the third output signal light.
  • the third false light filling module includes: a second amplifier, and the second amplifier includes an input stage of the second amplifier and an input stage of the second amplifier
  • the output stage of the second amplifier, the input stage of the second amplifier is used to receive the second input signal light, generate spontaneous emission light with preset optical power according to the optical power of the second input signal light
  • the second The output stage of the amplifier is configured to amplify the second input signal light and the spontaneous emission light according to the amplification gain of the third false light filling module to generate the third output signal light.
  • the third dummy optical filling module includes: a second amplifier and a second dummy optical combiner, and the second amplifier includes an input of the second amplifier stage and the output stage of the second amplifier, and the input stage of the second amplifier, are used to amplify the second input signal light to generate a second amplified signal light according to the amplification gain of the third false light filling module;
  • the second dummy light combiner is configured to receive the second amplified signal light and the third dummy light, and adjust the second amplified signal according to the optical power of the input light of the third dummy light filling module light and the input optical power of the third false light to generate a second coupled signal light;
  • the output stage of the second amplifier is used to amplify the second coupled signal light according to the amplification gain of the third false light filling module The signal light generates the third output signal light.
  • the control module when the optical power of the third output signal light is less than the third reference value, the control module is specifically configured to increase the second light The amplification gain of the amplifier enables the second optical amplifier to work in an automatic optical power locking state.
  • control module is further configured to increase the optical power of the third dummy light input by the second dummy optical combiner.
  • control module is further configured to: determine that the absolute value of the difference between the optical power of the second input signal light and the fourth reference value is greater than a second threshold,
  • the second threshold value corresponds to the maximum adjustment amount of the gain of the second optical amplifier
  • the fourth reference value corresponds to the second input signal light operating in a full-wave state and the wavelength of each wavelength in the second input signal light The setting range of the optical power when the optical signal works in the normal state.
  • the control module controls the gain of the second amplifier to the maximum adjustment amount, the optical power of the second input light is less than the fourth reference value, that is, the optical power of the second input signal light is equal to the fourth reference value The difference is negative.
  • control module when the optical power of the third output signal light is greater than the third reference value, the control module is specifically configured to reduce the second false The optical power of the third false light input by the optical combiner.
  • control module is further configured to reduce the amplification gain of the second optical amplifier, so that the second optical amplifier works in an automatic optical power locking state.
  • control module is further configured to: determine that the absolute value of the difference between the optical power of the second input signal light and the fourth reference value is greater than a second threshold,
  • the second threshold value corresponds to the attenuation of the optical power of the third false light by the third false light filling module adjusted to a maximum value
  • the fourth reference value corresponds to the second input signal light working in a full-wave state
  • the setting range of the optical power when the optical signals of each wavelength in the second input signal light work in a normal state.
  • the control module controls the second false optical combiner to adjust the attenuation of the optical power of the third false light to the maximum value
  • the optical power of the second input light is greater than the fourth reference value, that is, The difference between the optical power of the second input signal light and the fourth reference value is positive.
  • the second dummy optical filling module includes a reconfigurable optical add-drop multiplexer ROADM.
  • an optical transmission system in a second aspect, includes the optical transmission device described in any one of the above first aspects.
  • Fig. 1 shows a schematic diagram of a WDM transmission system applicable to the embodiment of the present application.
  • Fig. 2 shows a schematic diagram of optical power transfer between wavelengths caused by the Raman effect in optical fiber transmission.
  • FIG. 3 shows a schematic diagram of an optical transmission device 300 provided by an embodiment of the present application.
  • Fig. 4 shows a schematic diagram of mutual replacement of real waves and false lights.
  • FIG. 5 shows a schematic diagram of an optical transmission device 500 provided by an embodiment of the present application.
  • FIG. 6 shows a schematic diagram of an optical transmission device 600 provided by an embodiment of the present application.
  • FIG. 7 shows a schematic diagram of an optical transmission device 700 provided by an embodiment of the present application.
  • FIG. 8 shows a schematic diagram of an optical transmission device 800 provided by an embodiment of the present application.
  • FIG. 9 shows a schematic diagram of a false optical combiner provided by an embodiment of the present application.
  • FIG. 10 shows a schematic diagram of the input signal light output by a false optical combiner and the output optical power of the false light.
  • FIG. 11 shows a schematic diagram of another false optical combiner provided by an embodiment of the present application.
  • FIG. 12 shows a schematic diagram of an optical transmission device 1200 provided by an embodiment of the present application.
  • FIG. 13 shows a schematic diagram of an optical transmission device 1300 provided by an embodiment of the present application.
  • FIG. 14 shows a schematic diagram of an optical transmission device 1400 provided by an embodiment of the present application.
  • FIG. 15 shows a schematic diagram of an optical transmission device 1500 provided by an embodiment of the present application.
  • FIG. 16 is a schematic diagram showing a change of the SRS effect of the signal light of the second wavelength band under the walk-off effect.
  • optical transmission device and system provided in the embodiments of the present application can be applied to an optical fiber communication network.
  • dummy light is an optical signal that does not contain service information, and the corresponding one may be a true wave optical signal, that is, an optical signal that carries service information.
  • A/B can indicate A or B
  • and/or can be used to describe associated objects
  • a and/or B which can mean: A exists alone, A and B exist simultaneously, and B exists alone. Among them, A and B can be singular or plural.
  • WDM technology allows dozens or even hundreds of optical channels to exist in one optical fiber.
  • the information to be transmitted is modulated in Different optical frequencies are transmitted on optical channels of different wavelengths.
  • a reconfigurable optical add-drop multiplexer (reconfigurable optical add-drop multiplexer, ROADM) can be added in the middle of the fiber link, which is a kind of optical add-drop multiplexer (ROADM) used in dense wavelength division multiplexing (dense wavelength division multiplexing) Division multiplexing (DWDM) devices or equipment in the system can dynamically adjust the wavelength of the uplink or downlink service through remote reconfiguration and arbitrarily assign the wavelength of the uplink and downlink services according to the needs, so as to achieve the purpose of flexible service scheduling.
  • ROADM optical add-drop multiplexer
  • optical amplifiers in WDM transmission systems, high-power multi-wavelength optical signals are coupled into an optical fiber, resulting in the aggregation of multi-wavelength optical signals on a small interface.
  • the optical fiber begins to behave Among them, SRS can cause optical power transfer between wavelengths, that is, there is energy transfer between different wavelengths, which makes the optical power of certain wavelengths drop, which becomes one of the key factors affecting system transmission performance.
  • Figure 2 shows the power change diagram of the WDM signal before and after optical fiber transmission. It can be seen that after optical fiber transmission, different wavelengths receive different gains under the SRS effect. Obtaining a positive gain increases the optical power, which can be regarded as the transfer of short-wavelength energy to long-wavelength energy, thereby forming a spectral distribution with a certain slope, in which the optical power of the short-wavelength is low and the optical power of the long-wavelength is high.
  • the Raman gain of different wavelengths introduced by the SRS effect can be described by the following formula.
  • P nout represents the optical power of the n-th wavelength after passing through the fiber
  • P nin represents the optical power of the n-th wavelength entering the fiber
  • g Ri represents when i>n
  • the n-th wavelength is The Raman gain coefficient of the i-th wavelength of the benchmark
  • P iin represents the optical power of the i-th wavelength entering the fiber
  • L effi represents the effective fiber length of the i-th wavelength
  • ⁇ n represents the angular frequency of the n-th wavelength
  • g Rn represents the Raman gain coefficient of the n-th wavelength based on the i-th wavelength when i ⁇ n
  • L effn represents the effective fiber length of the n-th wavelength
  • ⁇ n represents the fiber attenuation coefficient of the nth wavelength
  • L is the fiber length.
  • the integral of the product of the optical power of each wavelength and the differential Raman gain affects the value of the Raman gain, that is, for different wavelengths, the corresponding Raman gain is different.
  • the optical spectrum of the system is expanded from the C-band to the C+L band, the optical spectrum is doubled, and the maximum Raman gain is increased by 4 times. More drastic power shifts for C-band systems.
  • a fixed reverse optical power balance is usually applied at the input end of the multiplexed optical signal of the WDM system to compensate for the power imbalance caused by the SRS effect.
  • wavelength channels will add and drop waves due to various factors, resulting in rapid changes in the combination of wavelength channels in optical fiber links.
  • it can be divided into two types: active adding and dropping waves and passive adding and dropping waves.
  • active adding and dropping waves for example, at the ROADM site, some wavelengths can be actively scheduled through a wavelength selection switch (wavelength selection switch, WSS) according to needs, or locally drop and add waves, so that the wavelength in the fiber link
  • WSS wavelength selection switch
  • the channel combination changes after the ROADM, that is, the optical power spectrum of the WDM signal changes. The speed of this change is limited by the response speed of the ROADM itself, generally at the second level.
  • passive wave adding for example, various sudden failures in the system, such as fiber breakage, optical amplifier failure, etc., will cause some or all wavelengths of the WDM signal to be blocked. It happens on the order of milliseconds.
  • the wavelength of the optical signal received by the downstream station is related to the wavelength of the optical signal sent by the upstream station, that is, when the upstream wavelength received by the downstream station is added or dropped, it will cause the Raman gain of the associated wavelength of the downstream station to change, This change is at the level of milliseconds. If it cannot be compensated in time, it will cause bit errors in downstream associated wavelengths due to performance damage.
  • one of the most critical factors is how to ensure that the reverse equalization compensation of the system matches the actual Raman gain. Avoid the Raman effect because of the Raman gain changes of different wavelengths caused by the addition of waves, and further, how to ensure that the Raman gain of the optical fiber transmission system remains stable, in other words, it is to ensure that the output signal of the downstream node of the system The Raman gain of light is not affected by the addition of upstream waves.
  • the embodiment of the present application provides an optical transmission device 300, specifically as shown in FIG. Two false light generating modules 321 and a second false light filling module 322 .
  • the first false light generating module 311 is configured to generate the first false light, and the first false light may be a wide-spectrum spontaneous emission (amplified spontaneous emission, ASE).
  • the first false light generating module 311 is connected to the first false light filling module 312 through an optical fiber, and inputs the generated first false light to an input port of the first false light filling module 312 .
  • the first false light filling module 312 is configured to receive the first input signal light and the first false light, and generate the first output signal light after processing the received first input signal light and the first false light.
  • the first dummy light filling module 312 is connected to the second dummy light filling module 322 through an optical fiber, and transmits the generated first output signal light to the input port of the second dummy light filling module 322 .
  • the second false light generating module 321 is configured to generate a second false light, and the second false light may be a wide-spectrum ASE.
  • the second false light generating module 321 is connected to the second false light filling module 322 through an optical fiber, and the generated second false light is input to the input port of the second false light filling module 312.
  • the control module 313 is configured to determine the optical power of the input light of the first dummy light filling module 312 and/or the amplification gain of the first dummy light filling module 312 according to the relationship between the optical power of the first output signal light and the first reference value , so that the optical power of the first output signal light is equal to the first reference value, wherein the first reference value corresponds to the first output signal light working in a full-wave state, and the optical signals of each wavelength in the first output signal light The setting range of optical power when working in normal state.
  • control module 313 can acquire the optical power of the first output signal light of the output port of the first false light filling module 312 or the input port of the second false light filling module 322, and determine the output signal light power of the first output signal light
  • the relationship between the optical power and the first reference value determines the adjustment to the first dummy light filling module 312, so that the change of the adjusted optical power of the first output signal light satisfies a preset range.
  • the first reference value corresponds to the setting range of the optical power when the first output signal light works in a full-wave state and the optical signals of each wavelength in the first output signal light work in a normal state. It is understood as the optical power when the first output signal light is in a full-wave state when the system is working normally.
  • the normal operation of the system means that the system does not have any faults, for example, no fiber breakage occurs, and the input signal light of the system under normal operation passes through the first output signal light of the first false light filling module. The power attenuation is only affected by the inherent damage of the first false optical filling module, and there is no wave drop or wave addition.
  • the value corresponding to the first reference value should be a set range, and the preset range can be a variable range set in advance in the control module 313.
  • the control module 313 adjusts the first false light After the module 312 is filled, when the optical power of the first output signal light is within a preset range, it is considered that the optical power of the first output signal light is equal to the first reference value.
  • the control module 313 obtains the optical power of the first output signal light in real time, if it is determined that the optical power of the first output signal light is always within the range even if it is fluctuating, the first output signal can be determined.
  • the optical power of the signal light is a constant value, and the first dummy light filling module 312 is not adjusted.
  • the optical power of the first output signal light obtained by the control module 313 may be obtained by means such as a photodetector, which is not limited in this application.
  • the adjustment of the first dummy light filling module 312 by the control module 313 includes, by determining the first input signal light of the first dummy light filling module 312 and the optical power of the first dummy light, so that the first dummy light
  • the filling module 312 adjusts the attenuation of the first input signal light and the first false light respectively according to the optical powers of the first input signal light and the first false light determined by the control module 313 .
  • the amplification gain of the first false light filling module 312 is controlled by determining the amplification gain of the first false light filling module 312 .
  • control module 313 simultaneously determines the optical power of the first input signal light input by the first false light filling module 312, the optical power of the first false light input and the amplification gain, so that the first false light filling module 312 passes Adjusting the attenuation of the optical power of the input signal and adjusting the amplification gain of the first dummy light filling module 312 ensures that the optical power of the first output signal light output by the first dummy light filling module 312 remains constant.
  • the control module 313 may determine an increased input signal optical power for the first false light filling module 312 and/or or an increased amplification gain.
  • the control module 313 determines that the first false light filling module 312 needs to reduce the power of the first input signal light and the first false light. The light attenuates and/or increases the amplification gain of the first input signal light and the first dummy light.
  • the control module 313 may determine a reduced input signal optical power and / or a reduced amplification gain. That is, the control module 313 determines that the first false light filling module 312 needs to increase the light attenuation of the first input signal light and the first false light and/or reduce the amplification of the first input signal light and the first false light gain.
  • the second false light filling module 322 is configured to receive the first output signal light, and control the wavelength range of the input second false light according to the wavelength range of the first output signal light, so that the wavelength range of the second output signal light remains unchanged .
  • the second false light filling module 322 can be realized by configuring WSS, through which the second false light and the first output signal light are synthesized into the line fiber, when the system needs to actively schedule through the WSS or locally drop or add waves , the second dummy light filling module 322 controls the input wavelength of the second dummy light to ensure that the combination of wavelength channels in the system is always stable in a full-wave state.
  • the first output signal light is the first input signal light passing through the second Since the system works normally for the signal light output after filling the module with a dummy light, the optical power of the first output signal light is only damaged inherently by the first dummy light filling module. It should be understood that the optical power of the first output signal light is the first reference value of the system.
  • the first dummy light filling module 312 can control the optical power of the input first dummy light to be zero, that is, no first dummy light is input to the system.
  • the first output signal light is transmitted to the second dummy optical filling module through the optical fiber.
  • the second dummy optical filling module needs to add and add waves locally according to the business requirements, the second dummy with the corresponding wavelength can be selected by configuring the WSS.
  • the optical signal fills the position of the true wavelength of the dropped wave, as shown in Figure 4.
  • the second false optical signal of the corresponding wavelength is blocked, and the local true wave is filled into the system.
  • the real wave and the second false wave are replaced with each other, ensuring that the wavelength channel combination of the system is in a state of full wave.
  • the optical power of the first output signal light acquired by the control module 313 may become smaller or larger than the first reference value.
  • the control module 313 determines that the first false light filling module 312 needs to increase the input power of the first false light and/or increase the amplification gain. At this time, the first false light The optical filling module 312 performs corresponding adjustments according to the input power and/or the amplification gain determined by the control module, so that the optical power of the first output signal light returns to the first reference value.
  • the control module 313 determines that the first false light filling module 312 needs to reduce the input power of the first false light and/or reduce the amplification gain, at this time, The first false light filling module 312 performs corresponding adjustments according to the input power and/or the amplification gain determined by the control module, so that the optical power of the first output signal light is reduced to the first reference value.
  • the scheme of realizing the mutual replacement of the real wave signal and the second false light wavelength by WSS is limited by the response speed of the WSS (generally speaking, the response speed is on the order of seconds ).
  • the response speed is on the order of seconds .
  • the time for the power to drop to the loss of signal (LOS) state is related to the type of fault that caused the wave drop, which may be milliseconds Order of magnitude, or seconds.
  • the second false light of the second false light filling module 322 is filled.
  • the SRS effect The resulting wavelength power gain will also change, which will also cause degradation of system performance.
  • the existence of the first false light filling module can ensure that the optical power at the input end of the second false light filling module remains constant, avoiding the change of Raman gain of different wavelengths due to passive addition of waves, so that The Raman gains of different wavelengths generated by the system due to the SRS effect remain stable, thereby maintaining the stability of the system performance.
  • the optical power change of the first input signal light is a process of gradually decreasing or gradually increasing. Therefore, the control module 313 can real-time according to the first output
  • the optical power of the signal light determines the input power and/or the amplification gain that the first false light filling module 312 needs to adjust to realize dynamic and real-time compensation for the change of the optical power spectrum caused by adding and dropping waves, so that the output light of the first signal light The power is always equal to this first reference value.
  • the optical transmission device 300 provided by the embodiment provided in this application, it can not only solve the problem of unstable Raman gain caused by the active addition and drop of waves due to service switching, but also can solve the problem of Raman gain instability in the WDM optical fiber transmission system. Realize real-time and dynamic compensation in case of various sudden failures. Due to the change of the optical power spectrum introduced by the addition of dropped waves, the Raman gain of different wavelengths output by the system remains stable, so that the Raman gain does not occur transient in the whole process. changes to ensure stable system performance.
  • optical transmission device proposed in this application will be described in detail in combination with different structures of the first false optical filling module.
  • FIG. 5 shows a schematic diagram of an optical transmission device 500 provided by an embodiment of the present application. Specifically, as shown in FIG. , a second false light generating module 521 and a second false light filling module 522, wherein the first false light filling module 512 includes a first false light combiner 514 and a first optical amplifier 515, and the second false light filling module 522 Includes WSS 523.
  • the first false light generating module 511 is configured to generate the first false light, and the first false light may be a wide-spectrum ASE.
  • the first false light generation module 511 is connected to the first false light combiner 514 through an optical fiber, and inputs the generated first false light to an input port of the first false light combiner 514 .
  • the first false light combiner 514 is configured to receive the first input signal light and the first false light, and adjust the input of the first input signal light and the first false light according to the optical power of the input light of the first false light filling module optical power to generate the first coupled signal light.
  • the first false optical combiner 514 is connected to the first optical amplifier 515 through an optical fiber, and transmits the generated first coupled signal light to the input port of the first optical amplifier 515 .
  • the first optical amplifier 515 is configured to amplify the first coupled signal light to generate the first output signal light according to the amplification gain of the first dummy light filling module 512 .
  • the first optical amplifier 515 is connected to the WSS 523 through an optical fiber, and optically transmits the generated first output signal to the input port of the WSS 523.
  • the control module 513 is configured to determine the optical power of the input light of the first false optical combiner 514 and/or the amplification gain of the first optical amplifier 515 according to the relationship between the optical power of the first output signal light and the first reference value, so as to Make the optical power of the first output signal light equal to a first reference value, wherein the first reference value corresponds to the first output signal light operating in a full-wave state, and the optical signals of each wavelength in the first output signal light work at The setting range of optical power in normal state.
  • the second false light generating module 521 is configured to generate a second false light, and the second false light may be a wide-spectrum ASE.
  • the second false light generating module 521 is connected to the WSS 523 through an optical fiber, and the generated second false light is input to the input port of the WSS 523.
  • WSS 523 is used to receive the first output signal light, and control the wavelength range of the input second false light according to the wavelength range of the first output signal light, so that the wavelength range of the second output signal light remains unchanged.
  • the initial state of the WSS 523 is set to be within the working wavelength range, and the wavelength not occupied by the first output signal light uses the second false light Filling, at this time the system works in the full-wave state, and configure the corresponding reverse equalization of the full-wave state to compensate the signal light output by the system.
  • the WSS 523 can fill the wavelength position of the wave dropping first output signal light with the second dummy light of the corresponding wavelength.
  • the WSS 523 will block the false optical signal of the corresponding wavelength and fill the local add wave into the system. That is, the WSS 523 replaces the signal light with the second false light to ensure that the system wavelength channel combination is always in a full-wave state, thereby ensuring that the Raman effect in the fiber is stable, and furthermore, the performance of the system is stable.
  • the control module 513 may determine an increased optical power of the input signal for the first false optical combiner 514 and/or increase the amplification gain of the first optical amplifier 515 .
  • control module 513 determines that the absolute value of the difference between the optical power of the first input signal light and the second reference value is smaller than the first threshold, the control module 513 increases the amplification gain of the first optical amplifier 515, and controls the second An optical amplifier 515 works in an automatic optical power locking state, so that the output power of the first output signal light remains unchanged.
  • control module 513 determines that the absolute value of the difference between the optical power of the first input signal light and the second reference value is greater than or equal to the first threshold, the control module 513 adjusts the amplification gain of the first optical amplifier 515 to the maximum gain, and at the same time , to determine an increased optical power of the input light for the first false optical combiner 514 .
  • the first threshold value corresponds to the maximum adjustment amount of the gain of the first optical amplifier 515
  • the second reference value corresponds to the first input signal light operating in the full-wave state
  • the optical signals of each wavelength in the first input signal light work at The setting range of optical power in normal state.
  • control module 513 controls the gain of the first amplifier 515 to the maximum adjustment amount, the optical power of the first input light is less than the second reference value, that is, the optical power of the first input signal light is equal to the second reference value The difference is negative.
  • the control module 513 can determine a reduced input signal optical power for the first false optical combiner 514 and/or reduce the amplification gain of the first optical amplifier 515 .
  • the control module 513 determines a reduced input for the first false optical combiner 514 The optical power of the first false light, the first false light combiner 514 adjusts the attenuation of the input first false light and the first input signal light according to the determined input optical power, so that the first output signal light The optical power meets the requirements of the control module 513 .
  • control module 513 determines that the absolute value of the difference between the optical power of the first input signal light and the first reference value is greater than or equal to the first threshold, the control module 513 determines that the first false light input by the first false optical combiner 514
  • the optical power needs to be reduced to the minimum, and at the same time reduce the amplification gain of the first optical amplifier 515, and control the first optical amplifier 515 to work in the automatic optical power locking state, so that the output power of the first output signal light remains unchanged.
  • the first threshold corresponds to adjusting the attenuation of the optical power of the first false light by the first false light filling module 512 to a maximum value. It should be understood that when the attenuation of the optical power of the first false light by the first false light filling module 512 is adjusted to the maximum value, at this time, the optical power of the first false light input by the first false light filling module 512 corresponds to the system The optical power of the minimum first false light that can be input.
  • the first false light combiner 514 can adjust the input first false light by controlling the attenuation of the first false light and the first input signal light according to the optical power of the input light determined by the control module 513. and the optical power of the first input signal light, and couple the input signal light to generate an output multiplexed optical signal.
  • the control module 513 controls the first false optical combiner 514 to adjust the attenuation of the optical power of the first false light to the maximum value
  • the optical power of the first input light is greater than the second reference value, that is, the first The difference between the optical power of the input signal light and the second reference value is positive.
  • the second reference value corresponds to the set range of optical power when the first input signal light works in the full-wave state and the optical signals of each wavelength in the first input signal light work in the normal state. It can be understood that when the system Optical power when the first input signal light is in full-wave state during normal operation. It should be understood that the normal operation of the system means that no failure occurs in the system, for example, no fiber cut occurs.
  • the first false optical combiner 514 may be formed by an optical switch, as shown in FIG. 9 .
  • the first false optical combiner 514 is based on The principle of the optical switch can be simply understood as that when two waveguides parallel to each other are close to each other, the propagation modes in the waveguides will be coupled during transmission and generate power exchange.
  • lithium niobate can be used as a substrate, a pair of parallel optical waveguides can be fabricated on the substrate, and Y-type 50/50 couplers are respectively connected to both ends of the waveguides.
  • Applying a voltage to the waveguide area through the electrodes causes the refractive index of the two waveguides in the coupling area to change, thereby changing the optical path accordingly.
  • the refractive index is the same, coherence enhancement is formed, and when the refractive index is opposite, cancellation is formed to achieve switching. the goal of.
  • the optical powers of the first input signal light and the first dummy light are controlled to complement each other, such as shown in FIG. 10 , so that the output power can be kept stable.
  • the first dummy optical combiner 514 may be composed of two optical attenuators and couplers, as shown in FIG. 11 , in FIG. 11 , the first dummy optical and the first input
  • the signal light is respectively input into two optical attenuators, which can attenuate the optical power of the input optical signal to a certain extent.
  • These two attenuators can use variable attenuators, which can realize the attenuation within a certain range.
  • the optical power attenuator can control the attenuation of the optical power of the first false light and the first input signal light according to the optical power of the input light determined by the controller 513, and output the first coupled signal light through the coupler.
  • the optical transmission device 500 provided by this application can quickly compensate for the change in optical power caused by adding and dropping waves in the scene where the line is passively added and dropped, so that the Raman gain of the system will not experience transient fluctuations. changes to ensure the stability of system performance.
  • the present application also provides three other structures of the first dummy optical filling module with different structures, as shown in FIG. 6 , FIG. 7 and FIG. 8 respectively. And other possible structures of the second false light filling module are shown in Fig. 11 and Fig. 12 respectively. For simplicity of description, only differences from FIG. 5 will be described in FIG. 6 , FIG. 7 , FIG. 8 , FIG. 12 and FIG. 13 .
  • FIG. 6 shows a schematic diagram of an optical transmission device 600 provided by an embodiment of the present application. Specifically, as shown in FIG. 6, the optical transmission device 600 is compared with the optical transmission device 500 in FIG. The position of a dimmer was swapped.
  • the first optical amplifier 615 is configured to amplify the first input signal light and generate the first amplified signal light according to the amplification gain of the first dummy light filling module.
  • the first optical amplifier 615 is connected to the first dummy optical combiner 614 through an optical fiber, and transmits the generated first amplified signal light to the input port of the first dummy optical combiner 614 .
  • the first false light combiner 614 is configured to receive the first amplified signal light and the first false light, and adjust the input of the first amplified signal light and the first false light according to the optical power of the input light of the first false light filling module optical power to generate the first output signal light.
  • the first false optical combiner 614 is connected to the WSS 623 through an optical fiber, and transmits the generated first output signal light to the input port of the WSS 623.
  • the first amplifier 515 in FIG. 5 can also be a multi-stage amplifier, such as the two-stage amplifier shown in FIG. 7.
  • the input stage and the output stage of the first amplifier are respectively included.
  • the output stage of the first amplifier can realize the same function as the first amplifier 515 in FIG. 5
  • the input stage of the first amplifier can realize the same function as the first amplifier 615 in FIG. 6 .
  • FIG. 8 shows a schematic diagram of another light elaboration device 800.
  • the first dummy light filling module 812 includes an input stage 811 of a first amplifier and an output stage 814 of the first amplifier.
  • the control module 813 can increase the amplification gain for the output stage 814 of the first optical amplifier and/or control the input stage 811 of the first amplifier to output a wide-spectrum ASE.
  • control module 813 determines that the absolute value of the difference between the optical power of the first input signal light and the second reference value is less than the first threshold, the control module 813 increases the amplification gain of the output stage 814 of the first optical amplifier , controlling the output stage 814 of the first optical amplifier to work in an automatic optical power locking state, so that the output power of the first output signal light is equal to the first reference value and remains unchanged.
  • control module 813 determines that the absolute value of the difference between the optical power of the first input signal light and the second reference value is greater than or equal to the first threshold, the control module 813 controls the amplification gain of the output stage 814 of the first optical amplifier to be adjusted to At the same time, according to the optical power of the second input signal light, the input stage 811 of the first amplifier is controlled to output a wide-spectrum ASE of preset optical power.
  • the first threshold value corresponds to the maximum adjustment amount of the output stage 814 gain of the first optical amplifier
  • the second reference value corresponds to the first input signal light operating in a full-wave state and the wavelength of each wavelength in the first input signal light The setting range of the optical power when the optical signal works in the normal state.
  • control module 813 controls the gain of the output stage 814 of the first optical amplifier to the maximum adjustment amount, the optical power of the first input light is less than the second reference value, that is, the optical power of the first input signal light is equal to The difference of the second reference value is negative.
  • the control module 813 can reduce the optical power of the wide-spectrum ASE output by the input stage 811 of the first amplifier and/or reduce the amplification gain of the output stage 814 of the first optical amplifier.
  • control module 813 determines that the absolute value of the difference between the optical power of the first input signal light and the second reference value is smaller than the first threshold, the control module 813 first determines whether the input stage 811 of the first amplifier is working at the output The state of the ASE, if yes, the control module 813 determines a reduced optical power of the output ASE for the input stage 811 of the first amplifier, so that the optical power of the first output signal light is equal to the first reference value.
  • the control module 813 determines that the absolute value of the difference between the optical power of the first input signal light and the second reference value is greater than or equal to the first threshold, the control module 813 first judges whether the input stage 811 of the first amplifier is working at the output ASE state, if yes, then the control module 813 determines a reduced optical power of the output ASE for the input stage 811 of the first amplifier, and simultaneously reduces the amplification gain of the output stage 814 of the first optical amplifier, and works in automatic optical In a power locking state, the optical power of the first output signal light satisfies a first reference value.
  • the first threshold is adjusted to a maximum value corresponding to the attenuation of the input stage 811 of the first amplifier. It should be understood that when the attenuation of the input stage 811 of the first amplifier is adjusted to a maximum value, the ASE optical power emitted by the input stage 811 of the first amplifier corresponds to the minimum ASE optical power that the system can input.
  • the control module 813 controls the attenuation of the optical power of the output ASE of the input stage 811 of the first amplifier to be adjusted to the maximum value
  • the optical power of the first input light is greater than the second reference value, that is, the first input
  • the difference between the optical power of the signal light and the second reference value is positive.
  • the second reference value corresponds to the set range of optical power when the first input signal light works in a full-wave state and the optical signals of each wavelength in the first input signal light work in a normal state, which can be understood as When the system is working normally, the optical power of the first input signal light is in the full-wave state. It should be understood that the normal operation of the system means that no failure occurs in the system, for example, no fiber cut occurs.
  • Fig. 12 shows a schematic diagram of optical transmission equipment 1200 in which the second false optical filling module is ROADM.
  • the second false optical filling module is ROADM.
  • it is a ROADM composed of two-level WSS. Flexible scheduling.
  • the second WSS selects the false optical signal of the corresponding wavelength to fill in the position of the missing wavelength corresponding to the received local downwave real wave optical signal.
  • the second false light corresponding to the true wavelength of the local upload wave is blocked by configuring the second WSS, and the real wave of the local upload wave is input into the system.
  • the alternate configuration of light ensures that the system wavelength channel combination is always in a full-wave state, so that the Raman effect in the fiber is stable, so that the system performance remains stable.
  • the first amplifier in the first false optical filling module can be the amplifier shared with the ROADM, as shown in Figure 13, this structure makes the volume of the optical transmission device smaller and the structure becomes more compact.
  • this embodiment of the present application also provides a schematic diagram of an optical transmission device 1400 as shown in FIG. 14 .
  • the optical transmission device 1400 includes a band demultiplexer 1410, a first false light generating module 1411, a first false light filling module 1412, and a control module. 1413 , the second false light generating module 1421 , the second false light filling module 1422 , the band multiplexer 1420 , the third false light generating module 1431 , and the third false light filling module 1432 .
  • the first dummy optical filling module 1412 includes a first dummy optical combiner 1414 and a first amplifier 1415 .
  • the second false light filling module is a ROADM composed of two-stage WSS.
  • the third dummy light filling module 1432 includes a first dummy light combiner 1434 and a first amplifier 1435 .
  • the band demultiplexer 1410 is configured to divide the input signal light into the first input signal light and the second input signal light according to the wavelength bands.
  • the waveband of the first input signal light is the first waveband, for example, the first input signal light can be the working wavelength of the C-band
  • the waveband of the second input signal light is the second waveband, for example, the second input The signal light may be the working wavelength of the L-band.
  • the first false light generating module 1411 is configured to generate a first false light, and the first false light may be a wide-spectrum ASE.
  • the first false light generation module 1411 is connected to the first false light combiner 1414 through an optical fiber, and inputs the generated first false light to the input port of the first false light combiner 1414 .
  • the first false optical combiner 1414 is configured to receive the first input signal light and the first false light, and fill the received first input signal light and the first false light according to the input signal optical power of the first false light filling module 1412 , coupled to generate the first coupled signal light.
  • the first false optical combiner 1414 is connected to the first optical amplifier 1415 through an optical fiber, and transmits the generated first coupled signal light to the input port of the first optical amplifier 1415 .
  • the first optical amplifier 1415 is configured to amplify the first coupled signal light to generate the first output signal light according to the amplification gain of the first dummy light filling module 1412 .
  • the first optical amplifier 1415 is connected to the ROADM 1422 through an optical fiber, and optically transmits the generated first output signal to the input port of the ROADM 1422.
  • the second false light generating module 1421 is configured to generate a second false light, and the second false light may be a wide-spectrum ASE.
  • the second false light generating module 1421 is connected to the ROADM 1422 through an optical fiber, and inputs the generated second false light to the input port of the ROADM 1422.
  • the third false light generating module 1431 is configured to generate a third false light, and the third false light may be a wide-spectrum ASE.
  • the third false light generation module 1431 is connected to the second false light combiner 1434 through an optical fiber, and inputs the generated third false light to the input port of the second false light combiner 1434 .
  • the second false light combiner 1434 is used to receive the second input signal light and the third false light, and fill the input signal light power of the module 1432 with the received second input signal light and the third false light according to the third false light filling module 1432 , coupled to generate the second coupled signal light.
  • the second false optical combiner 1434 is connected to the second optical amplifier 1435 through an optical fiber, and transmits the generated second coupled signal light to the input port of the second optical amplifier 1435 .
  • the second optical amplifier 1435 is configured to amplify the second coupled signal light to generate a third output signal light according to the amplification gain of the third dummy light filling module 1432 .
  • the second optical amplifier 1435 is connected to the ROADM 1422 through an optical fiber, and optically transmits the generated first output signal to the input port of the ROADM 1422.
  • the control module 1413 is configured to determine the optical power of the input light of the first false optical combiner 1414 and/or the amplification gain of the first optical amplifier 1415 according to the relationship between the optical power of the first output signal light and the first reference value, so as to making the optical power of the first output signal light equal to a first reference value, wherein the first reference value corresponds to the first output signal light operating in a full-wave state, and the optical signals of each wavelength in the first output signal light operating in a normal The setting range of the optical power in the state.
  • control module 1413 is also configured to determine the optical power of the input light of the second false optical combiner 1434 and/or the power of the second optical amplifier 1435 according to the relationship between the optical power of the third output signal light and the third reference value. Amplifying the gain so that the optical power of the third output signal light is equal to a third reference value, the third reference value corresponds to the third output signal light working in a full-wave state, and the optical signals of each wavelength in the third output signal light The setting range of optical power when working in normal state.
  • ROADM 1422 configured to receive the first output signal light and the third output signal light, and control the wavelength range of the input second dummy light according to the wavelength range of the first output signal light, so that the wavelength range of the second output signal light remains the same change, and control the wavelength range of the input second false light according to the wavelength range of the third output signal light, so that the wavelength range of the fourth output signal light remains unchanged.
  • the control module 1413 controls the first false optical combiner 1414 to set the input power of the first false light to 0, that is, controls the second The false light combiner 1434 adjusts the attenuation of the third false light to the maximum.
  • the damage of the first output signal light is only lost by the first false light combiner 1414.
  • the third output signal The optical damage is only caused by the inherent loss of the second false optical combiner 1434.
  • the optical power of the first output signal light is equal to the first reference value
  • the optical power of the third output signal light is equal to the third reference value.
  • the first reference value corresponds to a set range of optical power when the first output signal light works in a full-wave state and the optical signals of each wavelength in the first output signal light work in a normal state.
  • the third reference value corresponds to a set range of optical power when the third output signal light works in a full-wave state and the optical signals of each wavelength in the third output signal light work in a normal state.
  • the ROADM 1422 is based on the service requirements, when the ROADM 1422 adds waves locally, it blocks the wavelength of the corresponding second false light according to the wavelength of the service signal light that is added locally, and blocks the wavelength of the service signal light that is added locally. Signal light is received into the system. When there is local downwave, the ROADM 1422 fills the system with the wavelength of the corresponding second dummy light according to the wavelength of the signal light for local downwave.
  • the control module 1413 can determine an increased input signal optical power for the first false optical combiner 1414 and/or increase the amplification of the first optical amplifier 1415 gain.
  • control module 1413 determines that the absolute value of the difference between the optical power of the first input signal light and the second reference value is smaller than the first threshold
  • control module 514 increases the amplification gain of the first optical amplifier 1415, and controls the second An optical amplifier 1415 works in an automatic optical power locking state, so that the optical power of the output first output signal remains unchanged.
  • control module 1413 determines that the absolute value of the difference between the optical power of the first input signal light and the second reference value is greater than or equal to the first threshold, the control module 1413 adjusts the amplification gain of the first optical amplifier 1415 to the maximum gain, and at the same time , increasing the optical power of the first false light input by the first false optical combiner 1414 .
  • the first threshold value corresponds to the maximum adjustment amount of the gain of the first optical amplifier 1415
  • the second reference value corresponds to the operation of the first input signal light in a full-wave state and the optical signals of each wavelength in the first input signal light The setting range of optical power in normal state.
  • control module 1413 controls the gain of the first amplifier 1415 to be the maximum adjustment amount, the optical power of the first input light is less than the second reference value, that is, the optical power of the first input signal light is equal to the second reference value The difference is negative.
  • the control module 1413 may determine an increased input signal optical power for the second false optical combiner 1434 and/or increase the amplification gain of the second optical amplifier 1435 .
  • control module 1413 determines that the absolute value of the difference between the optical power of the second input signal light and the fourth reference value is smaller than the second threshold, the control module 1413 increases the amplification gain of the second optical amplifier 1435, and controls the first The second optical amplifier 1435 works in the state of automatic optical power locking, so that the output power of the third output signal light remains unchanged.
  • control module 1413 determines that the absolute value of the difference between the optical power of the second input signal light and the fourth reference value is greater than or equal to the second threshold, the control module 1413 adjusts the amplification gain of the second optical amplifier 1435 to the maximum gain, and at the same time , increasing the optical power of the third false light input by the second false optical combiner 1434 .
  • the second threshold value corresponds to the maximum adjustment amount of the gain of the second optical amplifier 1435
  • the fourth reference value corresponds to the operation of the second input signal light in a full-wave state and the operation of optical signals of each wavelength in the second input signal light The setting range of optical power in normal state.
  • control module 1413 controls the gain of the second amplifier 1435 to be the maximum adjustment amount, the optical power of the second input light is less than the fourth reference value, that is, the optical power of the second input signal light is equal to the fourth reference value The difference is negative.
  • the control module 1413 may determine a reduced input signal optical power for the first false optical combiner 1414 And/or reduce the amplification gain of the first optical amplifier 1415.
  • control module 1413 determines that the absolute value of the difference between the optical power of the first input signal light and the first reference value is smaller than the first threshold, the control module 1413 reduces the input first false value of the first false optical combiner 1414.
  • the optical power of the light is the optical power of the light.
  • control module 1413 When the control module 1413 determines that the absolute value of the difference between the optical power of the first input signal light and the first reference value is greater than or equal to the first threshold, the control module 1413 will output the first false light input from the first false optical combiner 1414 Reduce the optical power to the minimum, reduce the amplification gain of the first optical amplifier 1415 at the same time, control the first optical amplifier 1415 to work in the automatic optical power locking state, and keep the output power of the first output signal light unchanged.
  • the first threshold corresponds to adjusting the attenuation of the optical power of the first false light by the first false optical combiner 1414 to a maximum value.
  • the control module 1413 controls the first false optical combiner 1414 to adjust the attenuation of the optical power of the first false light to the maximum value
  • the optical power of the first input light is greater than the second reference value, that is, the first The difference between the optical power of the input signal light and the second reference value is positive.
  • control module 1413 may pass Determine a reduced input signal optical power for the second dummy optical combiner 1434 and/or reduce the amplification gain of the second optical amplifier 1435 .
  • control module 1413 determines that the absolute value of the difference between the optical power of the second input signal light and the fourth reference value is smaller than the second threshold, the control module 1413 reduces the input third false value of the second false optical combiner 1434.
  • the optical power of the light is the optical power of the light.
  • control module 1413 determines that the absolute value of the difference between the optical power of the second input signal light and the fourth reference value is greater than or equal to the second threshold, the control module 1413 uses the power of the third false light input by the second false optical combiner 1434 Reduce the optical power to the minimum, reduce the amplification gain of the second optical amplifier 1435 at the same time, control the second optical amplifier 1435 to work in the automatic optical power locking state, and keep the power of the output third output signal light unchanged.
  • the second threshold is adjusted to a maximum value corresponding to the attenuation of the optical power of the third false light by the second false optical combiner 1434 .
  • the control module 1413 controls the second false optical combiner 1434 to adjust the attenuation of the optical power of the first false light to the maximum value
  • the optical power of the second input light is greater than the fourth reference value, that is, the second The difference between the optical power of the input signal light and the fourth reference value is positive.
  • the first dummy optical combiner 1414 and the second dummy optical combiner 1434 can be constituted by the optical switch shown in FIG. 9 or FIG. Relevant descriptions in a dummy optical combiner 514 will not be repeated here.
  • the device 1400 can also be equivalent to the above-mentioned optical transmission device 500 .
  • the optical transmission device 1400 provided by this application is applied in the scenario where there are multiple bands of input signal light, and can independently control each band to realize rapid compensation for the change in optical power introduced by adding waves. , so that the Raman gain of the system will not change transiently, ensuring the stability of the system performance.
  • FIG. 15 shows a schematic diagram of an optical transmission device 1500 provided by an embodiment of the present application.
  • the third false light filling module is arranged at the output end of the second false light filling device, that is, in Figure 15, for the two-band system, the opposite transmission can be used structure.
  • both the first WSS and the second WSS can be used to fill false light
  • the input end of the first WSS is connected to the fourth false light generating module through an optical fiber to obtain the fourth false light generation module.
  • the input end of the second WSS is connected to the second false light generating module through an optical fiber to obtain the second false light generated by the second false light generating module.
  • the second false light is used to compensate and fill the missing waveband in the first output signal light received by the ROADM
  • the fourth false light is used to fill in the missing waveband in the third output signal light received by the ROADM. Compensation padding.
  • the walk-off effect of opposite transmission can average out the moment of wave drop, wherein, due to the power change of band 1 or band 2, the transient Raman gain changes introduced, as shown in FIG. 16 .
  • Fig. 16 it can be seen that when the band 1 is dropped and the false optical combiner is filled with false light, the change of the Raman gain of the band 2 due to the influence of the false optical combiner is negligible.
  • FIG. 6, FIG. 7, FIG. 8, FIG. 12, FIG. 13, FIG. 14 and the embodiments of FIG. 15 can also be combined with each other, for example, the embodiment shown in FIG. 6 is combined with FIG. 14, that is, the first A false light filling module or a third false light filling module may adopt the structure shown in FIG. 6 .
  • the embodiment shown in FIG. 7 is combined with FIG. 15 , that is, the first dummy light filling module or the third dummy light filling module may adopt the structure shown in FIG. 7 .
  • the present application further provides an optical transmission system, where the optical transmission system includes the optical transmission device provided in any one of the foregoing embodiments.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disc, SSD)) etc.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a high-density digital video disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disc, SSD)
  • a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device can be components.
  • One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on a signal having one or more packets of data (e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems). Communicate through local and/or remote processes.
  • packets of data e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • each functional unit may be fully or partially implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer instructions (programs). When the computer program instructions (program) are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (solid state disk, SSD)), etc.
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

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Abstract

本申请实施例提供了一种光传输设备和系统，该设备包括：第一假光和第二假光生成模块，生成第一假光和第二假光；第一假光填充模块，接收第一输入信号光和第一假光，生成第一输出信号光；控制模块，根据第一输出信号光的光功率与第一基准值的关系，确定第一假光填充模块的输入光的光功率和/或第一假光填充模块的放大增益，使第一输出信号光的光功率等于第一基准值；第二假光填充模块，根据接收的第一输出信号光的波长范围控制输入的第二假光的波长范围，使第二输出信号光的波长范围保持不变。本申请通过第一假光填充模块维持第二假光填充模块输入端的光功率稳定，使得第二输出信号光在下游光纤传输时的拉曼增益保持稳定，从而提升系统的稳定性。

Description

一种光传输设备和系统
本申请要求于2021年12月14日提交中国国家知识产权局、申请号202111524310.X、申请名称为“一种光传输设备和系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及光接入和光传输网络技术领域，并且更具体地，涉及一种光传输设备和系统。
背景技术
随着通信技术的发展，第五代移动通信技术(5th generation mobile communication technology，5G)、增强现实(augmented reality，AR)、虚拟现实(virtual reality，VR)、云计算、高清视频以及物联网等新业务与应用快速兴起，对网络流量的需求随之高速增长。当前，常用的两种提升网络传输容量的方案分别是通过增加光纤部署数量和提升单纤传输容量。其中基于波分复用(wavelength division multiplexing，WDM)技术的频谱带宽扩展具有实施方便灵活、经济效益高等优势，目前已成为首选的扩容方案。
然而，由于光纤中存在的受激拉曼散射(stimulated raman scattering，SRS)效应，使得光功率随着波长的不同而发生转移，因此，当波长的功率或者波长通道组合发生变化时，拉曼效应导致的光谱倾斜发生改变，进而导致WDM传输系统的不同波长通道信号光功率平坦度劣化。特别是针对系统故障导致的速度较快的被动掉波，如不能及时响应，将引发系统性能劣化，从而产生突发误码。
因此，如何确保系统性能的稳定是亟待解决的问题。
发明内容
本申请实施例提供一种光传输设备和系统，能够维持系统的拉曼增益稳定，提升系统性能的稳定性。
第一方面，提供了一种光传输设备，该设备包括：第一假光生成模块、第一假光填充模块、控制模块、第二假光生成模块、第二假光填充模块，所述第一假光生成模块，用于生成第一假光；所述第二假光生成模块，用于生成第二假光；所述第一假光填充模块，用于接收第一输入信号光和所述第一假光，处理所述第一输入信号光和所述第一假光并生成第一输出信号光；所述控制模块，用于根据所述第一输出信号光的光功率与第一基准值的关系，确定所述第一假光填充模块的输入光的光功率和/或所述第一假光填充模块的放大增益，以使所述第一输出信号光的光功率等于所述第一基准值，所述第一基准值对应所述第一输出信号光工作在满波状态、且所述第一输出信号光中各波长的光信号工作在正常状态时的光功率的设定范围；所述第二假光填充模块，用于接收所述第一输出信号光，根据所述第一输出信号光的 波长范围控制输入的所述第二假光的波长范围，以使第二输出信号光的波长范围保持不变。
应理解，所述控制模块还用于获取所述第一输出信号光的光功率，例如可以通过光探测器来检测所述第一输出信号光的光功率，所述控制模块获取所述光探测器检测的所述第一输出信号光的光功率。
基于上述方案，本申请通过第一假光填充模块的功率填充，保证第二假光填充模块的输入端光功率稳定，使得第二输出信号光在下游光纤传输时的拉曼增益保持稳定。
结合第一方面，在第一方面的某些实现方式中，所述第一假光填充模块包括：第一放大器和第一假光合路器，所述第一假光合路器，用于接收所述第一输入信号光和所述第一假光，根据所述第一假光填充模块的输入光的光功率，调整所述第一输入信号光和所述第一假光的输入光功率，生成第一耦合信号光；所述第一放大器，用于根据所述第一假光填充模块的放大增益，放大所述第一耦合信号光生成所述第一输出信号光。
结合第一方面，在第一方面的某些实现方式中，所述第一假光填充模块包括：第一放大器和第一假光合路器，所述第一放大器，用于根据所述第一假光填充模块的放大增益，放大所述第一输入信号光生成第一放大信号光；所述第一假光合路器，用于接收所述第一放大信号光和所述第一假光，根据所述第一假光填充模块的输入光的光功率，调整所述第一放大信号光和所述第一假光的输入光功率，生成所述第一输出信号光。
结合第一方面，在第一方面的某些实现方式中，所述第一假光填充模块包括：第一放大器，所述第一放大器包括所述第一放大器的输入级与所述第一放大器的输出级，所述第一放大器的输入级，用于接收所述第一输入信号光，根据所述第一输入信号光的光功率，生成预设光功率的自发辐射光，所述第一放大器的输出级，用于根据所述第一假光填充模块的放大增益，放大所述第一输入信号光和所述自发辐射光，生成所述第一输出信号光。
结合第一方面，在第一方面的某些实现方式中，所述第一假光填充模块包括：第一放大器、第一假光合路器，所述第一放大器包括所述第一放大器的输入级与所述第一放大器的输出级，所述第一放大器的输入级，用于根据所述第一假光填充模块的放大增益，放大所述第一输入信号光生成第一放大信号光；所述第一假光合路器，用于接收所述第一放大信号光和所述第一假光，根据所述第一假光填充模块的输入光的光功率，调整所述第一放大信号光和所述第一假光的输入光功率，生成第一耦合信号光；所述第一放大器的输出级，用于根据所述第一假光填充模块的放大增益，放大所述第一耦合信号光生成所述第一输出信号光。
结合第一方面，在第一方面的某些实现方式中，当所述第一输出信号光的光功率小于所述第一基准值时，所述控制模块具体用于，增加所述第一光放大器的放大增益，使所述第一光放大器工作在自动光功率锁定状态。
结合第一方面，在第一方面的某些实现方式中，所述控制模块还用于，增加所述第一假光合路器输入的所述第一假光的光功率。
结合第一方面，在第一方面的某些实现方式中，所述控制模块还用于：确定所述第一输入信号光的光功率与第二基准值的差的绝对值大于第一阈值，所述第一阈值对应所述第一光放大器增益的最大调节量，所述第二基准值对应所述第一输入信号光工作在满波状态、且所述第一输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
应理解，所述控制模块还用于获取所述第一输入信号光的光功率，例如可以通过光探测器来检测所述第一输入信号光的光功率，所述控制模块获取所述光探测器检测的所述第一输 入信号光的光功率。
需要说明的是，所述控制模块控制所述第一放大器增益为最大调解量时，该第一输入光的光功率小于第二基准值，即第一输入信号光的光功率与第二基准值的差值为负。
结合第一方面，在第一方面的某些实现方式中，当所述第一输出信号光的光功率大于所述第一基准值时，所述控制模块具体用于，降低所述第一假光合路器输入的所述第一假光的光功率。
结合第一方面，在第一方面的某些实现方式中，所述控制模块还用于，降低所述第一光放大器的放大增益，使所述第一光放大器工作在自动光功率锁定状态。
结合第一方面，在第一方面的某些实现方式中，所述控制模块还用于：确定所述第一输入信号光的光功率与第二基准值的差的绝对值大于第一阈值，所述第一阈值对应所述第一假光填充模块对所述第一假光光功率的衰减调节至最大值，所述第二基准值对应所述第一输入信号光工作在满波状态、且所述第一输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
需要说明的是，所述控制模块控制所述第一假光合路器将该第一假光的光功率的衰减调节至最大值时，该第一输入光的光功率大于第二基准值，即第一输入信号光的光功率与第二基准值的差值为正。
结合第一方面，在第一方面的某些实现方式中，所述设备还包括：第三假光生成模块、第三假光填充模块，所述第三假光生成模块，用于生成第三假光；所述第三假光填充模块，用于接收第二输入信号光和所述第三假光，处理所述第二输入信号光和所述第三假光并生成第三输出信号光；所述控制模块，还用于根据所述第三输出信号光的光功率与第三基准值的关系，确定所述第三假光填充模块的输入光的光功率和/或所述第三假光填充模块的放大增益，以使所述第三输出信号光的光功率等于所述第三基准值，所述第三基准值对应所述第三输出信号光工作在满波状态、且所述第三输出信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
基于上述方案，本申请提供的光传输设备能够应用于两个及以上波段的信号光的波分复用系统，使得信号在下游光纤传输时的拉曼增益维持稳定。
结合第一方面，在第一方面的某些实现方式中，所述第二假光填充模块，还用于接收所述第三输出信号光，根据所述第三输出信号光的波长范围控制输入的所述第二假光的波长范围，以使第四输出信号光的波长范围保持不变，所述第一输出信号光与所述第三输出信号光的传输方向相同。
结合第一方面，在第一方面的某些实现方式中，所述设备还包括：第四假光生成模块，所述第四假光生成模块，用于生成第四假光；所述第二假光填充模块，还用于接收所述第三输出信号光，根据所述第三输出信号光的波长范围控制输入的所述第四假光的波长范围，以使第四输出信号光的波长范围保持不变，所述第一输出信号光与所述第三输出信号光的传输方向相反。
基于上述方案，利用对向传输的走离效应，当系统中的某一个波段信号光掉波时，能够降低对另一个波段信号光产生的SRS效应的积累。
结合第一方面，在第一方面的某些实现方式中，所述第三假光填充模块包括：第二放大器和第二假光合路器，所述第二假光合路器，用于接收所述第二输入信号光和所述第三假光， 根据所述第三假光填充模块的输入光的光功率，调整所述第二输入信号光和所述第三假光的输入光功率，生成第二耦合信号光；所述第二放大器，用于根据所述第三假光填充模块的放大增益，放大所述第二耦合信号光生成所述第三输出信号光。
结合第一方面，在第一方面的某些实现方式中，所述第三假光填充模块包括：第二放大器和第二假光合路器，所述第二放大器，用于根据所述第三假光填充模块的放大增益，放大所述第二输入信号光生成第二放大信号光；所述第二假光合路器，用于接收所述第二放大信号光和所述第三假光，根据所述第三假光填充模块的输入光的光功率，调整所述第二放大信号光和所述第三假光的输入光功率，生成所述第三输出信号光。
结合第一方面，在第一方面的某些实现方式中，所述第三假光填充模块包括：第二放大器，所述第二放大器包括所述第二放大器的输入级与所述第二放大器的输出级，所述第二放大器的输入级，用于接收所述第二输入信号光，根据所述第二输入信号光的光功率，生成预设光功率的自发辐射光，所述第二放大器的输出级，用于根据所述第三假光填充模块的放大增益，放大所述第二输入信号光和所述自发辐射光，生成所述第三输出信号光。
结合第一方面，在第一方面的某些实现方式中，所述第三假光填充模块包括：第二放大器、第二假光合路器，所述第二放大器包括所述第二放大器的输入级与所述第二放大器的输出级，所述第二放大器的输入级，用于根据所述第三假光填充模块的放大增益，放大所述第二输入信号光生成第二放大信号光；所述第二假光合路器，用于接收所述第二放大信号光和所述第三假光，根据所述第三假光填充模块的输入光的光功率，调整所述第二放大信号光和所述第三假光的输入光功率，生成第二耦合信号光；所述第二放大器的输出级，用于根据所述第三假光填充模块的放大增益，放大所述第二耦合信号光生成所述第三输出信号光。
结合第一方面，在第一方面的某些实现方式中，当所述第三输出信号光的光功率小于所述第三基准值时，所述控制模块具体用于，增加所述第二光放大器的放大增益，使所述第二光放大器工作在自动光功率锁定状态。
结合第一方面，在第一方面的某些实现方式中，所述控制模块还用于，增加所述第二假光合路器输入的所述第三假光的光功率。
结合第一方面，在第一方面的某些实现方式中，所述控制模块还用于：确定所述第二输入信号光的光功率与第四基准值的差的绝对值大于第二阈值，所述第二阈值对应所述第二光放大器增益的最大调节量，所述第四基准值对应所述第二输入信号光工作在满波状态、且所述第二输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
需要说明的是，所述控制模块控制所述第二放大器增益为最大调解量时，该第二输入光的光功率小于第四基准值，即第二输入信号光的光功率与第四基准值的差值为负。
结合第一方面，在第一方面的某些实现方式中，当所述第三输出信号光的光功率大于所述第三基准值时，所述控制模块具体用于，降低所述第二假光合路器输入的所述第三假光的光功率。
结合第一方面，在第一方面的某些实现方式中，所述控制模块还用于，降低所述第二光放大器的放大增益，使所述第二光放大器工作在自动光功率锁定状态。
结合第一方面，在第一方面的某些实现方式中，所述控制模块还用于：确定所述第二输入信号光的光功率与第四基准值的差的绝对值大于第二阈值，所述第二阈值对应所述第三假光填充模块对所述第三假光光功率的衰减调节至最大值所述第四基准值对应所述第二输入信 号光工作在满波状态、且所述第二输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
需要说明的是，所述控制模块控制所述第二假光合路器将该第三假光的光功率的衰减调节至最大值时，该第二输入光的光功率大于第四基准值，即第二输入信号光的光功率与第四基准值的差值为正。
结合第一方面，在第一方面的某些实现方式中，所述第二假光填充模块包括可重新配置的光分插复用器ROADM。
第二方面，提供了一种光传输系统，该系统包括如上述第一方面中任一方面所述的光传输设备。
附图说明
图1示出了一种适用于本申请实施例的WDM传输系统的示意图。
图2示出了光纤传输中的拉曼效应导致的波长之间的光功率转移示意图。
图3示出了本申请实施例提供的一种光传输设备300的示意图。
图4示出了一种真波与假光相互替换示意图。
图5示出了本申请实施例提供的一种光传输设备500的示意图。
图6示出了本申请实施例提供的一种光传输设备600的示意图。
图7示出了本申请实施例提供的一种光传输设备700的示意图。
图8示出了本申请实施例提供的一种光传输设备800的示意图。
图9示出了本申请实施例提供的一种假光合路器的示意图。
图10示出了一种假光合路器输出的输入信号光与假光输出光功率的示意图。
图11示出了本申请实施例提供的另一种假光合路器的示意图。
图12示出了本申请实施例提供的一种光传输设备1200的示意图。
图13示出了本申请实施例提供的一种光传输设备1300的示意图。
图14示出了本申请实施例提供的一种光传输设备1400的示意图。
图15示出了本申请实施例提供的一种光传输设备1500的示意图。
图16示出了一种走离效应下第二波段信号光的SRS效应的变化的示意图。
具体实施方式
下面将结合附图，对本申请实施例中的技术方案进行描述。
本申请实施例提供的光传输设备和系统可以应用于光纤通信网络中。
为了便于理解本申请实施例，作出以下说明。
第一、在下文示出的本申请实施例中的文字说明或者附图中的术语，“第一”、“第二”、“第三”、“第四”等以及各种数字编号仅为描述方便进行的区分，而不必用于描述特定的顺序或者先后次序，并不用来限制本申请实施例的范围。例如，区分不同的步骤后光信号的不同状态等。
第二、下文示出的本申请实施例中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可以包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其他步骤或者单元。
第三、在本申请下文的实施例中，假光(dummy light)为不包含业务信息的光信号，与之对应的可以是真波光信号，即携带业务信息的光信号。
第四、在本申请实施例中，“/”可以表示前后关联的对象是一种“或”的关系，例如，A/B可以表示A或B；“和/或”可以用于描述关联对象存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。其中A，B可以是单数或者复数。
第五、在本申请实施例中，“示例性的”或者“例如”等词用于表示例子、例证或说明，被描述为“示例性的”或者“例如”的实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念，便于理解。
随着通信技术的发展，WDM技术使得一根光纤中存在数十条甚至上百条光波道，在如图1所示的一种典型的WDM传输系统的示意图中，需要传输的信息被调制在不同的光频率，即在不同波长的光通道上进行传输。为了实现业务的灵活调度，可以在光纤链路的中间加入可重新配置的光分插复用器(reconfigurable optical add-drop multiplexer，ROADM)，其是一种使用在密集波分复用(dense wavelength division multiplexing，DWDM)系统中的器件或设备，能够通过远程的重新配置，根据需要任意指配上下业务的波长，来动态调节上路或下路业务波长，从而达到灵活调度业务的目的。
一般来讲，WDM传输系统中通常会伴随着光放大器的使用，大功率的多波长光信号被耦合进一根光纤，从而导致多波长光信号聚集在很小的界面上，这时光纤开始表现出非线性特性，其中，SRS能够导致波长之间的光功率转移，即不同波长之间存在能量转移，使得某些波长的光功率下降，成为影响系统传输性能的关键因素之一。
图2示出了光纤传输前后，WDM信号的功率变化图，可以看到，经过光纤传输后，不同波长在SRS效应下受到的增益不同，短波长光得到负增益导致光功率下降，长波长光得到正增益使得光功率上升，可以看作是短波长的能量向着长波长转移，从而形成短波长的光功率低，长波长的光功率高的带有一定倾斜度的光谱分布。
其中，因SRS效应而引入的不同波长的拉曼增益，可以通过如下公式来进行说明。
Figure PCTCN2022124627-appb-000001
式中，各个参数的含义分别为：
P nout表示第n个波长经过光纤后的光功率，n∈[1，N]，P nin表示第n个波长进入光纤的光功率，g Ri表示当i＞n时，以第n个波长为基准的第i个波长的拉曼增益系数，P iin表示第i个波长进入光纤的光功率，L effi表示第i个波长的有效光纤长度，ω n表示第n个波长的角频率，ω i表示第i个波长的角频率，g Rn表示当i＜n时，以第i个波长为基准的第n个波长的拉曼增益系数，L effn表示表示第n个波长的有效光纤长度，α n表示第n个波长的光纤衰耗系数，L为光纤长度。
根据上式可知，各个波长的光功率与微分拉曼增益乘积的积分影响拉曼增益的数值，即对不同的波长来说，其对应的拉曼增益是不同的。例如，当系统的光频谱由C波段扩展到C+L波段后，光频谱增加了2倍，最大的拉曼增益变大了4倍，那么对于C+L系统来说，SRS能 够带来比C波段系统更加剧烈的功率转移。
为了使系统工作的稳定，通常会在WDM系统的复用光信号的输入端施加固定的反向光功率均衡来补偿因为SRS效应而引起的功率不平衡。
然而，在实际光传输链路中，波长通道会由于各种因素发生加掉波，导致光纤链路中波长通道组合的快速变化。通常可以分为主动加掉波和被动加掉波两类。其中，对于主动加掉波，例如，可以是在ROADM站点，根据需要通过波长选择开关(wavelength selection switch，WSS)对某些波长主动进行调度或者本地下波、加波，使得光纤链路中的波长通道组合经过ROADM之后发生变化，即WDM信号的光功率谱发生变化。这种变化的速度受限于ROADM自身的响应速度，一般在秒级。对于被动加掉波，例如，可以是系统中各种突发故障，比如断纤、光放故障等等因素，将导致WDM信号的部分波长或者全部波长被阻断，这种故障引起的掉波在毫秒量级就发生了。
因此，可以理解的是，不论是对于由于WSS主动控制引起的加掉波，或者是由于系统故障而导致的被动加掉波，由于使得WDM系统的波长数量或各个波长的光功率发生增减的变化，即，造成了系统实际拉曼增益发生改变，因此，仍然采用相同的反向均衡补偿会使得施加的反向均衡补偿与实际光纤的拉曼增益不匹配的情况发生。也就是，会造成某些波长会发生欠补偿或者过补偿的现象，进一步地，使得经过光纤传输后的某些波长的光信号的光功率过低或过高，从而对WDM信号引入损伤代价，严重情况下还会导致业务中断的情况发生。例如，由于下游站点接收的光信号的波长与上游站点发出的光信号的波长相关，即当下游站点接收的上游波长发生加掉波时，会引起下游站点的关联波长的拉曼增益发生变化，这种变化是毫秒两级的，若无法及时补偿，将会引起下游关联波长因为性能损伤而出现误码。
此外，对于C+L波段的WDM系统发生的主动加掉波或者被动加掉波，由于原有的反向均衡补偿与实际的拉曼增益的不匹配度更差，会使得上述问题产生更加恶化的后果。
为了避免上述由于系统主动加掉波以及被动加掉波造成的问题，确保系统性能的稳定，一个最关键的因素就是如何确保系统的反向均衡补偿与实际的拉曼增益匹配，本质上是需要规避拉曼效应因为加掉波带来的不同波长的拉曼增益变化，更进一步地，即如何保证光纤传输系统的拉曼增益维持稳定，换句话说，就是要确保系统的下游节点的输出信号光的拉曼增益不会受到上游加掉波的影响。
为了解决上述问题，本申请实施例提供一种光传输设备300，具体如图3所示，光传输设备300包括第一假光生成模块311、第一假光填充模块312、控制模块313、第二假光生成模块321以及第二假光填充模块322。
其中，第一假光生成模块311，用于生成第一假光，该第一假光可以是一个宽谱的自发辐射(amplified spontaneous emission，ASE)。该第一假光生成模块311通过光纤与第一假光填充模块312相连，将生成的第一假光输入至第一假光填充模块312的输入端口。
第一假光填充模块312，用于接收第一输入信号光和第一假光，并将接收到的第一输入信号光和第一假光经过处理后生成第一输出信号光。该第一假光填充模块312与第二假光填充模块322通过光纤相连，将生成的第一输出信号光传输至第二假光填充模块322的输入端口。
第二假光生成模块321，用于生成第二假光，该第二假光可以是一个宽谱的ASE。该第二假光生成模块321通过光纤与第二假光填充模块322相连，将生成的第二假光输入至第二 假光填充模块312的输入端口。
控制模块313，用于根据第一输出信号光的光功率与第一基准值的关系，确定第一假光填充模块312的输入光的光功率和/或第一假光填充模块312的放大增益，以使第一输出信号光的光功率等于该第一基准值，其中，第一基准值对应该第一输出信号光工作在满波状态、且该第一输出信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
需要说明的是，该控制模块313可以获取第一假光填充模块312的输出端口或者第二假光填充模块322的输入端口的第一输出信号光的光功率，通过判断该第一输出信号光的光功率与第一基准值的关系，确定对第一假光填充模块312的调节，使得调节后的第一输出信号光的光功率的变化满足预设的范围。
需要说明的是，该第一基准值对应该第一输出信号光工作在满波状态、且该第一输出信号光中各波长的光信号工作在正常状态时的光功率的设定范围，可以理解为当系统正常工作时，第一输出信号光处于满波状态时的光功率。应理解，该系统正常工作是指，系统未发生任何故障，例如，未发生断纤等情况，系统在正常工作下的输入信号光经过该第一假光填充模块后的第一输出信号光的功率衰减，仅仅受到该第一假光填充模块的固有损伤，不存在掉波或者加波的情况。
应理解，第一基准值对应的值应为一个设定范围，该预设的范围可以是提前在该控制模块313中设置好的一个可变动范围，当该控制模块313通过调节第一假光填充模块312后，使得第一输出信号光的光功率在预设范围内时，认为该第一输出信号光的光功率等于该第一基准值。
同样的，当该控制模块313实时获取该第一输出信号光的光功率时，若确定该第一输出信号光的光功率即使在变动，但始终在该范围内时，可以确定该第一输出信号光的光功率为恒定值，并不对该第一假光填充模块312进行调节。
其中，该控制模块313获取该第一输出信号光的光功率可以是通过光探测器等手段来获取，本申请对此不做限定。
此外，该控制模块313对该第一假光填充模块312的调节包括，通过确定该第一假光填充模块312的第一输入信号光以及第一假光的光功率，使得该第一假光填充模块312根据该控制模块313确定的第一输入信号光以及第一假光的光功率，分别调节输入的第一输入信号光以及第一假光的衰减。或者通过确定该第一假光填充模块312的放大增益，控制该第一假光填充模块312的放大增益。或者该控制模块313同时确定上述第一假光填充模块312输入的第一输入信号光的光功率、输入的该第一假光的光功率以及放大增益，使得该第一假光填充模块312通过调节输入信号的光功率的衰减量以及调节该第一假光填充模块312的放大增益，保证该第一假光填充模块312输出的第一输出信号光的光功率保持恒定不变。
具体地，当控制模块313获取的第一输出信号光的光功率相比第一基准值小时，该控制模块313可以通过为第一假光填充模块312确定一个增大的输入信号光功率和/或一个增大的放大增益。换句话说，当控制模块313获取的第一输出信号光的光功率相比第一基准值小时，该控制模块313确定第一假光填充模块312需要降低对第一输入信号光以及第一假光的光衰减和/或增大对第一输入信号光以及第一假光的放大增益。
对应地，当控制模块313获取的第一输出信号光的光功率相比第一基准值大时，该控制模块313可以通过为第一假光填充模块312确定一个减小的输入信号光功率和/或一个减小的 放大增益。即，该控制模块313确定该第一假光填充模块312需要增大对第一输入信号光以及第一假光的光衰减和/或降低对第一输入信号光以及第一假光的的放大增益。
第二假光填充模块322，用于接收第一输出信号光，根据第一输出信号光的波长范围控制输入的第二假光的波长范围，以使第二输出信号光的波长范围保持不变。
其中，该第二假光填充模块322可以采用配置WSS来实现，通过WSS将第二假光与第一输出信号光合成到线路光纤中，当系统中需要通过WSS主动进行调度或者本地下波、加波时，该第二假光填充模块322通过控制第二假光的输入波长，以保证系统中的波长通道组合始终稳定在满波状态。
接下来，针对不同的场景，对该设备300的工作原理进行说明。
在一种可实现的方式中，当线路中未存在线路断纤或者其他信号光输入时，即第一输入信号光无任何掉波或加波，第一输出信号光是第一输入信号光通过第一假光填充模块后输出的信号光，由于该系统正常工作，因此，该第一输出输出信号光的光功率仅受到第一假光填充模块的固有损伤。应理解，第一输出信号光的光功率为该系统的第一基准值。此时，第一输入信号光经过该第一假光填充模块312时，该第一假光填充模块312可以控制输入第一假光的光功率为零，即无第一假光向系统输入。
该第一输出信号光经过光纤传输至第二假光填充模块中，若此时根据业务需求，该第二假光填充模块需要本地上下波时，可以通过配置WSS，选择对应波长的第二假光信号填充掉波的真波波长的位置，如图4所示。同样的，当发生本地加波时，通过配置WSS，将对应波长的第二假光信号阻断，将本地真波填充到系统中。由此，真波和第二假波相互替换，确保系统的波长通道组合式中处于满波的状态。
在另一种可能的实现方式中，若系统中存在线路断纤、光放故障或者故障恢复过程中存在的信号光输入时，即第一输入信号光发生掉波或加波，那么第一输入信号光经过该第一假光填充模块312后，控制模块313获取的第一输出信号光的光功率相对于第一基准值存在变小或者变大的情况。
对于第一输出信号光的光功率变小的情况，该控制模块313确定该第一假光填充模块312需要增加的第一假光的输入功率和/或增加放大增益，此时，第一假光填充模块312根据控制模块确定的输入功率和/或放大增益，进行相应的调整，使得第一输出信号光的光功率恢复为第一基准值。对于第一输出信号光的光功率变大的情况，该控制模块313确定该第一假光填充模块312需要减小的第一假光的输入功率和/或减小的放大增益，此时，第一假光填充模块312根据控制模块确定的输入功率和/或放大增益，进行相应的调整，使得第一输出信号光的光功率减小到第一基准值。
需要说明的是，对于第二假光填充模块322来讲，通过WSS实现真波信号与第二假光波长相互替换的方案受限于WSS的响应速度(一般来说，该响应速度为秒级)。对于光纤系统发生故障(一般为毫秒级)使得系统被动掉波的情况来说，第二假光将无法及时填充由于真波掉波的波长，即在第二假光填充之前，系统的波长通道组合已经发生了变化，导致系统的性能发生劣化，甚至可能导致某些波长通道的业务中断。
此外，由于在实际的掉波过程中，真波的波道功率是逐渐下降的，该功率跌落到信号丢失(loss of signal，LOS)状态的时间与引起掉波的故障类型相关，可能是毫秒量级的，或者是秒级的。但是只有当检测到真波的波道达到LOS状态后，该第二假光填充模块322的第二 假光才进行填充，此时，由于真波的波长通道的功率已经发生改变，则SRS效应引起的波长功率增益也将发生改变，同样也会造成系统性能的劣化。
因此，该第一假光填充模块的存在，能够保证在第二假光填充模块的输入端的光功率始终维持不变，规避由于被动加掉波带来的不同波长的拉曼增益的变化，使得系统由于SRS效应产生的不同波长的拉曼增益保持稳定，从而维持系统性能的稳定。
此外，无论是对于线路断纤或者信号光输入，在该过程中，第一输入信号光的光功率变化是一个逐渐变小或者逐渐变大的过程，因此，控制模块313能够实时根据第一输出信号光的光功率确定第一假光填充模块312需要调整的输入功率和/或放大增益，实现动态、实时补偿因为加掉波引入的光功率谱的变化，使得输出的第一信号光的光功率始终等于该第一基准值。
综上所述，本申请提供的实施例提供的光传输设备300中，不仅能够解决由于业务切换而发生的主动加掉波引起的拉曼增益不稳定的情况，同时能够在WDM光纤传输系统发生各种突发故障情况下，实现实时、动态的补偿因为加掉波引入的光功率谱的变化，维持系统输出的不同波长的拉曼增益保持稳定，从而使得整个过程拉曼增益不发生瞬态变化，保证了系统性能稳定。
接下来，结合不同的第一假光填充模块的结构，对本申请提出光传输设备进行详细的说明。
图5示出了本申请实施例提供一种光传输设备500的示意图，具体如图5所示，光传输设备500包括第一假光生成模块511、第一假光填充模块512、控制模块513、第二假光生成模块521以及第二假光填充模块522，其中，该第一假光填充模块512包括第一假光合路器514以及第一光放大器515，该第二假光填充模块522包括WSS 523。
其中，第一假光生成模块511，用于生成第一假光，该第一假光可以是一个宽谱的ASE。该第一假光生成模块511通过光纤与第一假光合路器514相连，将生成的第一假光输入至第一假光合路器514的输入端口。
第一假光合路器514，用于接收第一输入信号光和第一假光，并根据第一假光填充模块的输入光的光功率，调整第一输入信号光和第一假光的输入光功率，生成第一耦合信号光。该第一假光合路器514与第一光放大器515通过光纤相连，将生成的第一耦合信号光传输至第一光放大器515的输入端口。
第一光放大器515，用于根据第一假光填充模块512的放大增益，放大第一耦合信号光生成第一输出信号光。该第一光放大器515与WSS 523通过光纤相连，将生成的第一输出信号光传输至WSS 523的输入端口。
控制模块513，用于根据第一输出信号光的光功率与第一基准值的关系，确定第一假光合路器514的输入光的光功率和/或第一光放大器515的放大增益，以使第一输出信号光的光功率等于第一基准值，其中，该第一基准值对应该第一输出信号光工作在满波状态、且该第一输出信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
第二假光生成模块521，用于生成第二假光，该第二假光可以是一个宽谱的ASE。该第二假光生成模块521通过光纤与WSS 523相连，将生成的第二假光输入至WSS 523的输入端口。
WSS 523，用于接收第一输出信号光，根据第一输出信号光的波长范围控制输入的第二 假光的波长范围，以使第二输出信号光的波长范围保持不变。
当光纤传输系统的上游并未发生断纤或其他故障情况发生时，设定该WSS 523的初始状态为将在工作波长范围内，没有被第一输出信号光占据的波长都用第二假光进行填充，此时系统工作在满波状态，并配置相应的满波状态的反向均衡对系统输出的信号光的进行补偿。当根据业务需要，该第一输出信号光发生掉波时，该WSS 523能够将对应波长的第二假光填充到掉波的第一输出信号光的波长位置。当发生本地上波时，该WSS 523将对应波长的假光信号阻断，将本地上波填充进系统。即该WSS 523将信号光与第二假光相互替换，确保系统波长通道组合始终处于满波状态，从而保证光纤中的拉曼效应是稳定的，进一步地，系统的性能是稳定的。
当光纤传输系统的上游发生断纤、其他故障发生时，此时，该第一输入信号光的光功率逐渐降低，在一种可实现的方式中，当控制模块513获取的第一输出信号光的光功率相比第一基准值小时，该控制模块513可以通过为第一假光合路器514确定一个增大的输入信号光功率和/或提高第一光放大器515放大增益。
具体地，当控制模块513确定第一输入信号光的光功率与第二基准值的差的绝对值小于第一阈值时，该控制模块513增大该第一光放大器515的放大增益，控制第一光放大器515工作在自动光功率锁定状态，使输出的第一输出信号光的功率保持不变。
当控制模块513确定第一输入信号光的光功率与第二基准值的差的绝对值大于或者等于第一阈值时，该控制模块513将第一光放大器515的放大增益调节到最大增益，同时，为第一假光合路器514确定一个增大的输入光的光功率。
其中，第一阈值对应该第一光放大器515增益的最大调节量，该第二基准值对应该第一输入信号光工作在满波状态、且第一输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
需要说明的是，该控制模块513控制该第一放大器515增益为最大调解量时，该第一输入光的光功率小于第二基准值，即第一输入信号光的光功率与第二基准值的差值为负。
当线路逐渐恢复过程中时，光纤传输系统的第一输入信号光功率逐渐增强，在一种可能实现的方式中，当控制模块513获取的第一输出信号光的光功率相比第一基准值大时，该控制模块513可以通过为第一假光合路器514确定一个减小的输入信号光功率和/或降低第一光放大器515放大增益。
具体地，当控制模块513确定第一输入信号光的光功率与第一基准值的差的绝对值小于第一阈值时，该控制模块513为第一假光合路器514确定一个减小的输入第一假光的光功率，该第一假光合路器514根据该确定的输入光功率，调节输入的第一假光和第一输入信号光的衰减量，使所述第一输出信号光的光功率满足控制模块513的要求。
当控制模块513确定第一输入信号光的光功率与第一基准值的差的绝对值大于或者等于第一阈值时，该控制模块513确定该第一假光合路器514输入的第一假光的光功率需要降到最低，同时减小第一光放大器515的放大增益，控制第一光放大器515工作在自动光功率锁定状态，使输出的第一输出信号光的功率保持不变。
其中，第一阈值对应第一假光填充模块512对所述第一假光光功率的衰减调节至最大值。应理解，当第一假光填充模块512对第一假光的光功率的衰减调节到最大值时，此时，该第一假光填充模块512输入的第一假光的光功率对应该系统所能输入的最小第一假光的光功率。
需要说明的是，该第一假光合路器514，能够根据控制模块513确定的输入光的光功率，通过控制第一假光以及第一输入信号光的衰减，调节其输入的第一假光以及第一输入信号光的光功率，并将输入的信号光耦合生成合波光信号输出。
需要说明的是，控制模块513控制第一假光合路器514将该第一假光的光功率的衰减调节至最大值时，该第一输入光的光功率大于第二基准值，即第一输入信号光的光功率与第二基准值的差值为正。
此外，该第二基准值对应该第一输入信号光工作在满波状态、且第一输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围，可以理解为当系统正常工作时，第一输入信号光处于满波状态时的光功率。应理解，该系统正常工作是指，系统未发生任何故障，例如，未发生断纤等情况。
在一种可能实现的方式中，该第一假光合路器514可以是由光开关构成的，如图9所示，在图9中，该第一假光合路器514为基于马赫泽德干涉仪结构的光开关，该光开关的原理可以简单理解为当相互平行的两个波导互相靠近时，波导中的传播模式会在传输过程中发生耦合并产生功率交换。
例如，可以以铌酸锂为基底，在基底上制作一对平行光波导，并在波导两端分别连接Y型50/50耦合器。通过电极对波导区施加电压，使得耦合区两波导的折射率发生变化，从而使光程相应变化，当折射率大小相同时，形成相干增强，折射率大小相反时，形成相消，达到开关切换的目的。
在调节过程中，控制第一输入信号光和第一假光的光功率互补，例如图10所示，可以使得输出的功率维持稳定。
在一种可能实现的方式中，该第一假光合路器514可以是由两个光衰减器和耦合器构成的，如图11所示，在图11中，第一假光和第一输入信号光分别输入两个光衰减器中，该光衰减器能够对输入的光信号的光功率进行一定的衰减，这两个衰减器可以采用可变衰减器，能够实现衰减量在一定范围内变化，光功率衰减器能够根据控制器513确定的输入光的光功率，控制第一假光和第一输入信号光的光功率的衰减量，并通过耦合器输出第一耦合信号光。
综上所述，本申请提供的光传输设备500，能够在线路被动加掉波的场景中，快速补偿因为加掉波引入的光功率的变化，使得系统的拉曼增益不会发生瞬态的变化，保证了系统性能的稳定。
基于图5所示的光传输设备500，本申请还提供了其他三种不同结构的第一假光填充模块的结构，分别如图6、图7和图8所示。以及第二假光填充模块的其他可能的结构，分别如图11和图12所示。为了说明的简便性，图6、图7、图8、图12和图13仅针对与图5的区别点进行说明。
图6示出了本申请实施例提供一种光传输设备600的示意图，具体如图6所示，该光传输设备600与图5中的光传输设备500相比，第一放大器的位置与第一假光器的位置进行了调换。
第一光放大器615，用于根据所述第一假光填充模块的放大增益，放大第一输入信号光并生成第一放大信号光。该第一光放大器615与第一假光合路器614通过光纤相连，将生成的第一放大信号光传输至第一假光合路器614的输入端口。
第一假光合路器614，用于接收第一放大信号光和第一假光，并根据第一假光填充模块 的输入光的光功率，调整第一放大信号光和第一假光的输入光功率，生成第一输出信号光。该第一假光合路器614与WSS 623通过光纤相连，将生成的第一输出信号光传输至WSS 623的输入端口。
此外，图5中的第一放大器515也可以是多级放大器构成，例如图7所示的两级放大器，在图7中，分别包括第一放大器的输入级和第一放大器的输出级，该第一放大器的输出级能够实现图5中第一放大器515相同的作用，该第一放大器的输入级能够实现图6中第一放大器615相同的作用。
图8示出了另一种光阐述设备800的示意图，在图8中，该第一假光填充模块812包括第一放大器的输入级811和第一放大器的输出级814。
当光纤传输系统的上游发生断纤、其他故障发生时，此时，该第一输入信号光的光功率逐渐降低，在一种可实现的方式中，当控制模块813获取的第一输出信号光的光功率相比第一基准值小时，该控制模块813可以通过为第一光放大器的输出级814提高放大增益和/或控制该第一放大器的输入级811输出宽谱ASE。
具体地，当控制模块813确定第一输入信号光的光功率与第二基准值的差的绝对值小于第一阈值时，该控制模块813增大该第一光放大器的输出级814的放大增益，控制第一光放大器的输出级814工作在自动光功率锁定状态，使输出的第一输出信号光的功率等于第一基准值，并保持不变。
当控制模块813确定第一输入信号光的光功率与第二基准值的差的绝对值大于或者等于第一阈值时，该控制模块813控制该第一光放大器的输出级814的放大增益调节到最大增益，同时，根据第二输入信号光的光功率，控制该第一放大器的输入级811输出预设光功率的宽谱ASE。
其中，第一阈值对应该第一光放大器的输出级814增益的最大调节量，该第二基准值对应该第一输入信号光工作在满波状态、且该第一输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
需要说明的是，该控制模块813控制该第一光放大器的输出级814增益为最大调解量时，该第一输入光的光功率小于第二基准值，即第一输入信号光的光功率与第二基准值的差值为负。
当线路逐渐恢复过程中时，光纤传输系统的第一输入信号光功率逐渐增强，在一种可能实现的方式中，当控制模块813获取的第一输出信号光的光功率相比第一基准值大时，该控制模块813可以通过降低该第一放大器的输入级811输出宽谱ASE的光功率和/或降低该第一光放大器的输出级814放大增益。
具体地，当控制模块813确定第一输入信号光的光功率与第二基准值的差的绝对值小于第一阈值时，该控制模块813首先判断该第一放大器的输入级811是否工作在输出ASE的状态，如果是，则该控制模块813为该第一放大器的输入级811确定一个减小的输出ASE的光功率，使所述第一输出信号光的光功率等于第一基准值。
当控制模块813确定第一输入信号光的光功率与第二基准值的差的绝对值大于或者等于第一阈值时，该控制模块813先判断该第一放大器的输入级811是否工作在输出ASE的状态，如果是，则该控制模块813为该第一放大器的输入级811确定一个减小的输出ASE的光功率，同时降低该第一光放大器的输出级814放大增益，并工作在自动光功率锁定状态，使所述第 一输出信号光的光功率满足第一基准值。
其中，第一阈值对应该第一放大器的输入级811的衰减调节至最大值。应理解，当该第一放大器的输入级811的衰减调节到最大值时，此时，该该第一放大器的输入级811出射的ASE光功率对应该系统所能输入的最小ASE的光功率。
需要说明的是，该控制模块813控制该第一放大器的输入级811的输出ASE的光功率的衰减调节至最大值时，该第一输入光的光功率大于第二基准值，即第一输入信号光的光功率与第二基准值的差值为正。
此外，该第二基准值对应该第一输入信号光工作在满波状态、且该第一输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围，可以理解为当系统正常工作时，第一输入信号光处于满波状态时的光功率。应理解，该系统正常工作是指，系统未发生任何故障，例如，未发生断纤等情况。
图12示出了第二假光填充模块为ROADM的光传输设备1200的示意图，在图12中，是两级WSS构成的ROADM，该ROADM能够根据需要任意指配上下业务的波长，实现业务的灵活调度。
在该ROADM站点中，当发生本地下波时，第二WSS选择对应的波长的假光信号填充到接收到本地下波的真波光信号对应的缺失的波长的位置，同理，当发生本地上波时，通过配置第二WSS，将对应的本地上波的真波波长的第二假光进行阻断，将本地上波的真波输入至系统中，通过第二WSS对真波信号和假光的相互交替的配置，确保系统波长通道组合始终处于满波状态，这样就使得光纤中的拉曼效应是稳定的，从而使得系统性能保持稳定。
此外，在图12的基础上，该第一假光填充模块中的第一放大器可以是与ROADM中共用的放大器，如图13所示，该结构使得光传输设备的体积变小，结构变得更为紧凑。
当系统中存在多个波段的输入信号光时，由于针对每个波段的光放大器的性能可能存在差异，因此，本申请实施例还提供了如图14所示光传输设备1400的示意图。
在图14中，是以输入信号光有两个波段为例进行说明的，该光传输设备1400包括波段分波器1410、第一假光生成模块1411、第一假光填充模块1412、控制模块1413、第二假光生成模块1421、第二假光填充模块1422、波段合波器1420、第三假光生成模块1431、第三假光填充模块1432。
其中，该第一假光填充模块1412包括第一假光合路器1414和第一放大器1415。该第二假光填充模块为两级WSS构成的ROADM。该第三假光填充模块1432包括第一假光合路器1434和第一放大器1435。
其中，波段分波器1410，用于将输入信号光按照波段，分成第一输入信号光和第二输入信号光。其中，该第一输入信号光的波段为第一波段，例如，该第一输入信号光可以是C波段的工作波长，该第二输入信号光的波段为第二波段，例如，该第二输入信号光可以是L波段的工作波长。
第一假光生成模块1411，用于生成第一假光，该第一假光可以是一个宽谱的ASE。该第一假光生成模块1411通过光纤与第一假光合路器1414相连，将生成的第一假光输入至第一假光合路器1414的输入端口。
第一假光合路器1414，用于接收第一输入信号光和第一假光，并将接收到的第一输入信号光和第一假光按照第一假光填充模块1412的输入信号光功率，耦合生成第一耦合信号光。 该第一假光合路器1414与第一光放大器1415通过光纤相连，将生成的第一耦合信号光传输至第一光放大器1415的输入端口。
第一光放大器1415，用于根据所述第一假光填充模块1412的放大增益，放大第一耦合信号光生成第一输出信号光。该第一光放大器1415与ROADM 1422通过光纤相连，将生成的第一输出信号光传输至ROADM 1422的输入端口。
第二假光生成模块1421，用于生成第二假光，该第二假光可以是一个宽谱的ASE。该第二假光生成模块1421通过光纤与ROADM 1422相连，将生成的第二假光输入至ROADM 1422的输入端口。
第三假光生成模块1431，用于生成第三假光，该第三假光可以是一个宽谱的ASE。该第三假光生成模块1431通过光纤与第二假光合路器1434相连，将生成的第三假光输入至第二假光合路器1434的输入端口。
第二假光合路器1434，用于接收第二输入信号光和第三假光，并将接收到的第二输入信号光和第三假光按照第三假光填充模块1432的输入信号光功率，耦合生成第二耦合信号光。该第二假光合路器1434与第二光放大器1435通过光纤相连，将生成的第二耦合信号光传输至第二光放大器1435的输入端口。
第二光放大器1435，用于根据第三假光填充模块1432的放大增益，放大第二耦合信号光生成第三输出信号光。该第二光放大器1435与ROADM 1422通过光纤相连，将生成的第一输出信号光传输至ROADM 1422的输入端口。
控制模块1413，用于根据第一输出信号光的光功率与第一基准值的关系，确定第一假光合路器1414的输入光的光功率和/或第一光放大器1415的放大增益，以使第一输出信号光的光功率等于第一基准值，其中，该第一基准值对应该第一输出信号光工作在满波状态、且第一输出信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
同时，该控制模块1413，还用于根据第三输出信号光的光功率与第三基准值的关系，确定第二假光合路器1434的输入光的光功率和/或第二光放大器1435的放大增益，以使第三输出信号光的光功率等于第三基准值，该第三基准值对应该第三输出信号光工作在满波状态、且该第三输出信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
ROADM 1422，用于接收第一输出信号光和第三输出信号光，根据第一输出信号光的波长范围控制输入的第二假光的波长范围，以使第二输出信号光的波长范围保持不变，和根据第三输出信号光的波长范围控制输入的第二假光的波长范围，以使第四输出信号光的波长范围保持不变。
当光纤传输系统的上游并未发生断纤、其他故障情况或者其他业务信号的上波时，控制模块1413控制第一假光合路器1414将第一假光的输入功率为0，即控制第二假光合路器1434将该第三假光的衰减量调节到最大，此时，可以理解为第一输出信号光的损伤仅受到第一假光合路器1414的损耗，类似的，第三输出信号光的损伤仅受到第二假光合路器1434的固有损耗，此时，该第一输出信号光的光功率等于第一基准值，该第三输出信号光的光功率等于第三基准值。
其中，该第一基准值对应所述第一输出信号光工作在满波状态、且该第一输出信号光中各波长的光信号工作在正常状态时的光功率的设定范围。该第三基准值对应该第三输出信号光工作在满波状态、且第三输出信号光中各波长的光信号工作在正常状态时的光功率的设定 范围。
此时，若该ROADM 1422根据业务需求，该ROADM 1422在本地上波时，根据本地上波的业务信号光的波长，将相应的第二假光的波长阻断，并将本地上波的业务信号光接收到系统中。存在本地下波时，该ROADM 1422根据本地下波的信号光的波长，将相应的第二假光的波长填充至系统中。
当光纤传输系统的上游发生断纤、其他故障发生时，此时，该第一输入信号光(对应第一波段)的光功率逐渐降低，在一种可实现的方式中，当控制模块1413获取的第一输出信号光的光功率相比第一基准值小时，该控制模块1413可以通过为第一假光合路器1414确定一个增大的输入信号光功率和/或提高第一光放大器1415放大增益。
具体地，当控制模块1413确定第一输入信号光的光功率与第二基准值的差的绝对值小于第一阈值时，该控制模块514增大该第一光放大器1415的放大增益，控制第一光放大器1415工作在自动光功率锁定状态，使输出的第一输出信号光的功率保持不变。
当控制模块1413确定第一输入信号光的光功率与第二基准值的差的绝对值大于或者等于第一阈值时，该控制模块1413将第一光放大器1415的放大增益调节到最大增益，同时，增加第一假光合路器1414输入的第一假光的光功率。
其中，第一阈值对应该第一光放大器1415增益的最大调节量，该第二基准值对应该第一输入信号光工作在满波状态、且该第一输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
需要说明的是，该控制模块1413控制该第一放大器1415增益为最大调解量时，该第一输入光的光功率小于第二基准值，即第一输入信号光的光功率与第二基准值的差值为负。
同样的，对于第二输入信号光，由于上游发生故障，导致第二输入信号光(对应第二波段)光功率逐渐降低，在一种可实现的方式中，当控制模块1413获取的第三输出信号光的光功率相比第三基准值小时，该控制模块1413可以通过为第二假光合路器1434确定一个增大的输入信号光功率和/或提高第二光放大器1435放大增益。
具体地，当控制模块1413确定第二输入信号光的光功率与第四基准值的差的绝对值小于第二阈值时，该控制模块1413增大该第二光放大器1435的放大增益，控制第二光放大器1435工作在自动光功率锁定状态，使输出的第三输出信号光的功率保持不变。
当控制模块1413确定第二输入信号光的光功率与第四基准值的差的绝对值大于或者等于第二阈值时，该控制模块1413将第二光放大器1435的放大增益调节到最大增益，同时，增加第二假光合路器1434输入的第三假光的光功率。
其中，第二阈值对应该第二光放大器1435增益的最大调节量，该第四基准值对应该第二输入信号光工作在满波状态、且该第二输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
需要说明的是，该控制模块1413控制该第二放大器1435增益为最大调解量时，该第二输入光的光功率小于第四基准值，即第二输入信号光的光功率与第四基准值的差值为负。
当光纤传输系统在断纤逐渐恢复的过程中，第一输入信号光的光功率或者第二输入信号光的光功率增强的时，在一种可能实现的方式中，第一输入信号光的光功率增强时，当控制模块1413获取的第一输出信号光的光功率相比第一基准值大时，该控制模块1413可以通过为第一假光合路器1414确定一个减小的输入信号光功率和/或降低第一光放大器1415放大增 益。
具体地，当控制模块1413确定第一输入信号光的光功率与第一基准值的差的绝对值小于第一阈值时，该控制模块1413减小第一假光合路器1414的输入第一假光的光功率。
当控制模块1413确定第一输入信号光的光功率与第一基准值的差的绝对值大于或者等于第一阈值时，该控制模块1413将第一假光合路器1414输入的第一假光的光功率降到最低，同时减小第一光放大器1415的放大增益，控制第一光放大器1415工作在自动光功率锁定状态，使输出的第一输出信号光的功率保持不变。
其中，第一阈值对应第一假光合路器1414对第一假光光功率的衰减调节至最大值。
需要说明的是，控制模块1413控制第一假光合路器1414将该第一假光的光功率的衰减调节至最大值时，该第一输入光的光功率大于第二基准值，即第一输入信号光的光功率与第二基准值的差值为正。
在另一种可能实现的方式中，第二输入信号光的光功率增强时，当控制模块1413获取的第三输出信号光的光功率相比第三基准值大时，该控制模块1413可以通过为第二假光合路器1434确定一个减小的输入信号光功率和/或降低第二光放大器1435放大增益。
具体地，当控制模块1413确定第二输入信号光的光功率与第四基准值的差的绝对值小于第二阈值时，该控制模块1413减小第二假光合路器1434的输入第三假光的光功率。
当控制模块1413确定第二输入信号光的光功率与第四基准值的差的绝对值大于或者等于第二阈值时，该控制模块1413将第二假光合路器1434输入的第三假光的光功率降到最低，同时减小第二光放大器1435的放大增益，控制第二光放大器1435工作在自动光功率锁定状态，使输出的第三输出信号光的功率保持不变。
其中，第二阈值对应该第二假光合路器1434对第三假光光功率的衰减调节至最大值。
需要说明的是，控制模块1413控制第二假光合路器1434将该第一假光的光功率的衰减调节至最大值时，该第二输入光的光功率大于第四基准值，即第二输入信号光的光功率与第四基准值的差值为正。
需要说明的是，在图14中，第一假光合路器1414和第二假光合路器1434可以采用图9或图11所示的光开关构成，其工作的方式可以参考图5中对第一假光合路器514中的相关说明，此处不再赘述。
应理解，当不同波段的光信号的放大增益能够在一个放大器上实现时，该装置1400也可以等效成上述光传输设备500。
此外，本申请的保护范围并不限于系统只有两个波段输入信号光的场景，对于大于两个波段的场景，应理解，可以在第二假光填充模块的输入端增加其他假光填充模块，并实现对不同波段独立控制和调节的效果。
综上所述，本申请提供的光传输设备1400，应用在当输入信号光存在多个波段的场景下，能够分别对各个波段进行独立控制，实现快速补偿因为加掉波引入的光功率的变化，使得系统的拉曼增益不会发生瞬态的变化，保证了系统性能的稳定。
图15示出了本申请实施例提供的光传输设备1500的示意图。如图15所示，相比于图15，第三假光填充模块布置在第二假光填充装置的输出端，即在该图15中，对于两个波段的系统，可以采用对向传输的结构。
需要说明的是，在图15中，该第一WSS和第二WSS都可以用于填充假光，第一WSS 的输入端通过光纤连接第四假光生成模块，用于获取第四假光生成模块产生的第四假光，第二WSS的输入端通过光纤连接第二假光生成模块，用于获取第二假光生成模块产生的第二假光。
其中，该第二假光用于对ROADM接收到的第一输出信号光中的缺少的波段进行补偿填充，第四假光用于对ROADM接收到的第三输出信号光中的缺少的波段进行补偿填充。
在图15所示的光传输设备1500中，对向传输的走离效应能平均掉波瞬间，其中，由于波段1或者波段2功率变化，引入的瞬态拉曼增益变化，如图16所示。根据图16可以看出，当波段1掉波后，假光合路器填充假光的时间里，波段2由于受到假光合路器影响的拉曼增益的变化可以忽略不计。
针对于上述图5、图6、图7、图8、图12、图13、图14以及图15的实施例，需要说明的是：
上述图5、图6、图7、图8、图12、图13、图14以及图15的实施例，也可以互相结合，例如，图6所示的实施例和图14相结合，即第一假光填充模块或者第三假光填充模块可以采用如图6所示的结构。或者图7所示的实施例和图15相结合，即第一假光填充模块或者第三假光填充模块可以采用如图7所示的结构等。
根据本申请实施例提供的光传输设备，本申请还提供一种光传输系统，该光传输系统中包括上述实施例中任意一个实施例提供的光传输设备。
应理解，在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disc，SSD))等。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在两个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各种说明性逻辑块 (illustrative logical block)和步骤(step)，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，各功能单元的功能可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令(程序)。在计算机上加载和执行所述计算机程序指令(程序)时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (26)

  1. 一种光传输设备，其特征在于，包括：第一假光生成模块、第一假光填充模块、控制模块、第二假光生成模块、第二假光填充模块，
    所述第一假光生成模块，用于生成第一假光；
    所述第二假光生成模块，用于生成第二假光；
    所述第一假光填充模块，用于接收第一输入信号光和所述第一假光，处理所述第一输入信号光和所述第一假光并生成第一输出信号光；
    所述控制模块，用于根据所述第一输出信号光的光功率与第一基准值的关系，确定所述第一假光填充模块的输入光的光功率和/或所述第一假光填充模块的放大增益，以使所述第一输出信号光的光功率等于所述第一基准值，所述第一基准值对应所述第一输出信号光工作在满波状态、且所述第一输出信号光中各波长的光信号工作在正常状态时的光功率的设定范围；
    所述第二假光填充模块，用于接收所述第一输出信号光，根据所述第一输出信号光的波长范围控制输入的所述第二假光的波长范围，以使第二输出信号光的波长范围保持不变。
  2. 根据权利要求1所述的设备，其特征在于，所述第一假光填充模块包括：第一放大器和第一假光合路器，
    所述第一假光合路器，用于接收所述第一输入信号光和所述第一假光，根据所述第一假光填充模块的输入光的光功率，调整所述第一输入信号光和所述第一假光的输入光功率，生成第一耦合信号光；
    所述第一放大器，用于根据所述第一假光填充模块的放大增益，放大所述第一耦合信号光生成所述第一输出信号光。
  3. 根据权利要求1所述的设备，其特征在于，所述第一假光填充模块包括：第一放大器和第一假光合路器，
    所述第一放大器，用于根据所述第一假光填充模块的放大增益，放大所述第一输入信号光生成第一放大信号光；
    所述第一假光合路器，用于接收所述第一放大信号光和所述第一假光，根据所述第一假光填充模块的输入光的光功率，调整所述第一放大信号光和所述第一假光的输入光功率，生成所述第一输出信号光。
  4. 根据权利要求1所述的设备，其特征在于，所述第一假光填充模块包括：第一放大器，所述第一放大器包括所述第一放大器的输入级与所述第一放大器的输出级，
    所述第一放大器的输入级，用于接收所述第一输入信号光，根据所述第一输入信号光的光功率，生成预设光功率的自发辐射光，
    所述第一放大器的输出级，用于根据所述第一假光填充模块的放大增益，放大所述第一输入信号光和所述自发辐射光，生成所述第一输出信号光。
  5. 根据权利要求1所述的设备，其特征在于，所述第一假光填充模块包括：第一放大器、第一假光合路器，所述第一放大器包括所述第一放大器的输入级与所述第一放大器的输出级，
    所述第一放大器的输入级，用于根据所述第一假光填充模块的放大增益，放大所述第 一输入信号光生成第一放大信号光；
    所述第一假光合路器，用于接收所述第一放大信号光和所述第一假光，根据所述第一假光填充模块的输入光的光功率，调整所述第一放大信号光和所述第一假光的输入光功率，生成第一耦合信号光；
    所述第一放大器的输出级，用于根据所述第一假光填充模块的放大增益，放大所述第一耦合信号光生成所述第一输出信号光。
  6. 根据权利要求2至5中任一项所述的设备，其特征在于，当所述第一输出信号光的光功率小于所述第一基准值时，
    所述控制模块具体用于，增加所述第一光放大器的放大增益，使所述第一光放大器工作在自动光功率锁定状态。
  7. 根据权利要求6所述的设备，其特征在于，
    所述控制模块还用于，增加所述第一假光合路器输入的所述第一假光的光功率。
  8. 根据权利要求7所述的设备，其特征在于，所述控制模块还用于：
    确定所述第一输入信号光的光功率与第二基准值的差的绝对值大于第一阈值，所述第一阈值对应所述第一光放大器增益的最大调节量，所述第二基准值对应所述第一输入信号光工作在满波状态、且所述第一输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
  9. 根据权利要求2至5中任一项所述的设备，其特征在于，当所述第一输出信号光的光功率大于所述第一基准值时，
    所述控制模块具体用于，降低所述第一假光合路器输入的所述第一假光的光功率。
  10. 根据权利要求9所述的设备，其特征在于，
    所述控制模块还用于，降低所述第一光放大器的放大增益，使所述第一光放大器工作在自动光功率锁定状态。
  11. 根据权利要求10所述的设备，其特征在于，所述控制模块还用于：
    确定所述第一输入信号光的光功率与第二基准值的差的绝对值大于第一阈值，所述第一阈值对应所述第一假光填充模块对所述第一假光光功率的衰减调节至最大值，所述第二基准值对应所述第一输入信号光工作在满波状态、且所述第一输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
  12. 根据权利要求1至11中任一项所述的设备，其特征在于，所述设备还包括：第三假光生成模块、第三假光填充模块，
    所述第三假光生成模块，用于生成第三假光；
    所述第三假光填充模块，用于接收第二输入信号光和所述第三假光，处理所述第二输入信号光和所述第三假光并生成第三输出信号光；
    所述控制模块，还用于根据所述第三输出信号光的光功率与第三基准值的关系，确定所述第三假光填充模块的输入光的光功率和/或所述第三假光填充模块的放大增益，以使所述第三输出信号光的光功率等于所述第三基准值，所述第三基准值对应所述第三输出信号光工作在满波状态、且所述第三输出信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
  13. 根据权利要求12所述的设备，其特征在于，
    所述第二假光填充模块，还用于接收所述第三输出信号光，根据所述第三输出信号光的波长范围控制输入的所述第二假光的波长范围，以使第四输出信号光的波长范围保持不变，所述第一输出信号光与所述第三输出信号光的传输方向相同。
  14. 根据权利要求12所述的设备，其特征在于，所述设备还包括：第四假光生成模块，
    所述第四假光生成模块，用于生成第四假光；
    所述第二假光填充模块，还用于接收所述第三输出信号光，根据所述第三输出信号光的波长范围控制输入的所述第四假光的波长范围，以使第四输出信号光的波长范围保持不变，所述第一输出信号光与所述第三输出信号光的传输方向相反。
  15. 根据权利要求12至14中任一项所述的设备，其特征在于，所述第三假光填充模块包括：第二放大器和第二假光合路器，
    所述第二假光合路器，用于接收所述第二输入信号光和所述第三假光，根据所述第三假光填充模块的输入光的光功率，调整所述第二输入信号光和所述第三假光的输入光功率，生成第二耦合信号光；
    所述第二放大器，用于根据所述第三假光填充模块的放大增益，放大所述第二耦合信号光生成所述第三输出信号光。
  16. 根据权利要求12至14中任一项所述的设备，其特征在于，所述第三假光填充模块包括：第二放大器和第二假光合路器，
    所述第二放大器，用于根据所述第三假光填充模块的放大增益，放大所述第二输入信号光生成第二放大信号光；
    所述第二假光合路器，用于接收所述第二放大信号光和所述第三假光，根据所述第三假光填充模块的输入光的光功率，调整所述第二放大信号光和所述第三假光的输入光功率，生成所述第三输出信号光。
  17. 根据权利要求12至14中任一项所述的设备，其特征在于，所述第三假光填充模块包括：第二放大器，所述第二放大器包括所述第二放大器的输入级与所述第二放大器的输出级，
    所述第二放大器的输入级，用于接收所述第二输入信号光，根据所述第二输入信号光的光功率，生成预设光功率的自发辐射光，
    所述第二放大器的输出级，用于根据所述第三假光填充模块的放大增益，放大所述第二输入信号光和所述自发辐射光，生成所述第三输出信号光。
  18. 根据权利要求1所述的设备，其特征在于，所述第三假光填充模块包括：第二放大器、第二假光合路器，所述第二放大器包括所述第二放大器的输入级与所述第二放大器的输出级，
    所述第二放大器的输入级，用于根据所述第三假光填充模块的放大增益，放大所述第二输入信号光生成第二放大信号光；
    所述第二假光合路器，用于接收所述第二放大信号光和所述第三假光，根据所述第三假光填充模块的输入光的光功率，调整所述第二放大信号光和所述第三假光的输入光功率，生成第二耦合信号光；
    所述第二放大器的输出级，用于根据所述第三假光填充模块的放大增益，放大所述第二耦合信号光生成所述第三输出信号光。
  19. 根据权利要求15至18中任一项所述的设备，其特征在于，当所述第三输出信号光的光功率小于所述第三基准值时，
    所述控制模块具体用于，增加所述第二光放大器的放大增益，使所述第二光放大器工作在自动光功率锁定状态。
  20. 根据权利要求19所述的设备，其特征在于，
    所述控制模块还用于，增加所述第二假光合路器输入的所述第三假光的光功率。
  21. 根据权利要求20所述的设备，其特征在于，所述控制模块还用于：
    确定所述第二输入信号光的光功率与第四基准值的差的绝对值大于第二阈值，所述第二阈值对应所述第二光放大器增益的最大调节量，所述第四基准值对应所述第二输入信号光工作在满波状态、且所述第二输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
  22. 根据权利要求15至18中任一项所述的设备，其特征在于，当所述第三输出信号光的光功率大于所述第三基准值时，
    所述控制模块具体用于，降低所述第二假光合路器输入的所述第三假光的光功率。
  23. 根据权利要求22所述的设备，其特征在于，
    所述控制模块还用于，降低所述第二光放大器的放大增益，使所述第二光放大器工作在自动光功率锁定状态。
  24. 根据权利要求23所述的设备，其特征在于，所述控制模块还用于：
    确定所述第二输入信号光的光功率与第四基准值的差的绝对值大于第二阈值，所述第二阈值对应所述第三假光填充模块对所述第三假光光功率的衰减调节至最大值，所述第四基准值对应所述第二输入信号光工作在满波状态、且所述第二输入信号光中各波长的光信号工作在正常状态时的光功率的设定范围。
  25. 根据权利要求1至24中任一项所述的设备，其特征在于，
    所述第二假光填充模块包括可重新配置的光分插复用器ROADM。
  26. 一种光传输系统，其特征在于，
    包括如权利要求1至25中任一项所述的光传输设备。
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