WO2025243164A1 - 一种光传输放大方法、光放大器、计算机程序产品及存储介质 - Google Patents
一种光传输放大方法、光放大器、计算机程序产品及存储介质Info
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- WO2025243164A1 WO2025243164A1 PCT/IB2025/055119 IB2025055119W WO2025243164A1 WO 2025243164 A1 WO2025243164 A1 WO 2025243164A1 IB 2025055119 W IB2025055119 W IB 2025055119W WO 2025243164 A1 WO2025243164 A1 WO 2025243164A1
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- potassium
- doped fiber
- optical signal
- fiber amplifier
- output unit
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Classifications
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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
- H04B10/2589—Bidirectional transmission
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
-
- 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
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
Definitions
- This disclosure relates to the field of communication technology, and in particular to an optical transmission amplification method, an optical amplifier, a computer program product, and a storage medium.
- the potassium-doped fiber amplifier is a commonly used amplifier in optical transmission systems, used to enhance the intensity of optical signals and improve the transmission distance and quality of optical signals.
- EDFAs In optical transmission systems, EDFAs typically operate in Automatic Gain Control (AGC) mode, in which the EDFA provides a constant amplification gain for input optical signals within its operating range.
- AGC Automatic Gain Control
- This disclosure provides an optical transmission amplification method, an optical amplifier, a computer program product, and a storage medium to improve the performance stability of an optical transmission system in the event of a line fault.
- This disclosure provides an optical transmission amplification method applicable to potassium-doped fiber amplifiers.
- the method includes: if the received input optical signal is detected to meet a fault criterion, blocking the input optical signal on the transmission link within the potassium-doped fiber amplifier to isolate an output unit within the potassium-doped fiber amplifier that is unaffected by the input optical signal; determining the desired output power for the potassium-doped fiber amplifier; and controlling the output unit to generate an output optical signal according to the desired output power during a fault.
- blocking the input optical signal on the transmission link within the potassium-doped fiber amplifier includes: adjusting a pre-selected target device on the transmission link to a target state so as to block the input optical signal through the target device.
- adjusting the target device pre-selected on the transmission link to the target state includes: if the target device includes a dimming attenuator, controlling the dimming attenuator to switch to the isolation state to block the input optical signal; if the target device includes an optical switch, controlling the optical switch to switch to a preset position to block the input optical signal.
- a dedicated unit is added to the potassium-doped fiber amplifier, and a target optical switch is added to the transmission link as the target device; the target optical switch includes a first position for conducting the transmission link, and also includes a second position for conducting the dedicated unit and the link portion of the transmission link located after the target optical switch; when the target optical switch is switched to the second position, the dedicated unit constitutes the output unit.
- the link portion of the transmission link that is still connected to the output end constitutes the output unit.
- determining the desired output power includes: obtaining the output power of the potassium-doped fiber amplifier before the fault is detected as the desired output power; or, taking the output power preset for the output unit as the desired output power; or, calculating the desired output power based on the power spectral density preset for the output unit.
- the output unit includes potassium-doped fiber
- controlling the output unit to generate an output optical signal according to the desired output power includes: adjusting the pump power applied to the potassium-doped fiber contained in the output unit so that the output optical signal generated by the output unit conforms to the desired output power.
- adjusting the pump power applied to the potassium-doped fiber contained in the output unit includes: sending a control command to the pump laser used by the output unit according to the pump setting parameters recorded for the output unit, so as to control the pump laser to adjust the pump power applied to the potassium-doped fiber contained in the output unit; wherein the pump setting parameters are calculated based on the desired output power.
- the method further includes: adjusting the pump laser based on the difference between the output power detected by the output detector in the potassium-doped fiber amplifier and the desired output power, until the output detector detects that the output light signal generated by the output unit meets the desired output power; and recording the pump setting parameters obtained after the feedback adjustment is completed as the pump setting parameters corresponding to the output unit.
- the method also includes: if the received input optical signal is detected to no longer meet the fault criteria, then the blocking of the input optical signal is lifted; the pump laser required by the transmission link is restored to the pump power before the fault, so that the potassium-doped fiber amplifier can resume the amplification processing of the input optical signal.
- removing the blockage of the input optical signal includes: restoring the target device on the transmission link used to block the input optical signal from the target state to the state before adjustment, so as to remove the blockage of the input optical signal; wherein, after detecting that the received input optical signal meets the fault criteria, the target device has been adjusted to the target state to block the input optical signal.
- This disclosure also provides a potassium-doped fiber amplifier, which includes a control component and a transmission link.
- the control component is used to execute one or more computer instructions to perform the aforementioned optical transmission amplification method.
- This disclosure also provides a computer-readable storage medium for storing a computer program, which, when executed by one or more processors, causes the one or more processors to perform the aforementioned optical transmission amplification method.
- This disclosure also provides a computer program product, including a computer program that, when executed by one or more processors, causes the one or more processors to perform the aforementioned optical transmission amplification method.
- a new operating mode is proposed in the potassium-doped fiber amplifier.
- the potassium-doped fiber amplifier can enter this operating mode when a line fault is detected.
- the input optical signal can be blocked on the transmission link within the potassium-doped fiber amplifier, thereby isolating an output unit within the potassium-doped fiber amplifier that is not affected by the input optical signal.
- the output unit can be controlled to generate an output optical signal according to the desired output power.
- the potassium-doped fiber amplifier can decouple the output power from the input optical signal based on this operating mode. The output power is no longer affected by the input optical signal. Therefore, the potassium-doped fiber amplifier can still maintain a stable output power, thereby ensuring the performance stability of the optical transmission system.
- Figure 1 is a schematic flowchart of an optical transmission amplification method provided in an exemplary embodiment of the present disclosure
- Figure 2 provides a schematic diagram of a conventional structure of a potassium-doped fiber amplifier
- FIG. 3 provides a schematic diagram of the internal structure of a potassium-doped fiber amplifier after hardware modification
- FIGS. 4-6 provide schematic diagrams of the internal structure of several potassium-doped fiber amplifiers without hardware modifications
- FIG. 7 is a schematic diagram of the structure of a potassium-doped fiber amplifier provided in another exemplary embodiment of the present disclosure.
- FIG. 8 is a schematic diagram of the structure of a control device provided in an exemplary embodiment of the present disclosure. Detailed Description
- the potassium-doped fiber amplifier is a commonly used amplifier in optical transmission systems to enhance the intensity of optical signals and improve the transmission distance and quality of optical signals.
- the working principle of the potassium-doped fiber amplifier is to amplify light through the excitation emission process.
- the main component of the potassium-doped fiber amplifier is potassium-doped fiber (EDF), which is an optical fiber made of silicon dioxide and doped with a small amount of rare earth element potassium ions (Er3+).
- a pump laser is a device based on the principle of laser amplification, used to output laser light.
- Pump lasers are commonly used devices in potassium-doped fiber amplifiers.
- the laser light output by the pump laser can be used to provide pump power to the potassium-doped fiber to excite potassium ions in the potassium-doped fiber, thereby supporting the amplification of optical signals by the potassium-doped fiber.
- AGO Automatic Gain Control
- the potassium-doped fiber amplifier typically shuts down the pump laser in AGC mode. Based on the working principle of the potassium-doped fiber amplifier, after the pump laser is turned off, the potassium-doped fiber inside the amplifier will lose its excitation source, which is equivalent to shutting down the output of the potassium-doped fiber amplifier.
- the inventors discovered during their research that this method of dealing with line faults by shutting down the output of the potassium-doped fiber amplifier can lead to unstable transmission performance of the optical transmission system.
- the optical transmission system is a multi-band wavelength division multiplexing (WDM) system
- shutting down the output of the potassium-doped fiber amplifier in a certain band according to AGC mode will affect the transmission performance of other bands.
- the potassium-doped fiber amplifier is usually located on the optical multiplex section (OMS). Shutting down the output of the potassium-doped fiber amplifier according to AGC mode may result in no light output from the OMS where the potassium-doped fiber amplifier is located.
- OMS optical multiplex section
- Optical transmission systems usually contain multiple OMS, and a downstream OMS may usually be connected to multiple upstream OMS.
- a downstream OMS may usually be connected to multiple upstream OMS.
- embodiments of this disclosure propose an optical transmission amplification method for use in optical transmission systems experiencing line faults. In this case, improve the performance stability of the optical transmission system.
- a new working mode is introduced for the potassium-doped fiber amplifier. This working mode ensures that the potassium-doped fiber amplifier can maintain stable output power when encountering line faults in the optical transmission system, thereby avoiding the impact of local line faults on the downstream OMS and ensuring the performance stability of the optical transmission system.
- FIG1 is a schematic flowchart of an optical transmission amplification method provided in an exemplary embodiment of the present disclosure, which can be performed by a potassium-doped fiber amplifier. Referring to FIG1, the method may include the following steps.
- Step 100 If the received input optical signal is detected to meet the fault criteria, the input optical signal is blocked on the transmission link in the potassium-doped fiber amplifier so as to isolate the output unit that is not affected by the input optical signal in the potassium-doped fiber amplifier.
- Step 101 For a potassium-doped fiber amplifier, determine the desired output power.
- Step 102 During the fault, the control output unit generates an output optical signal according to the desired output power.
- FIG. 2 shows a schematic diagram of a conventional structure of a potassium-doped fiber amplifier.
- the potassium-doped fiber amplifier may include control components and a transmission link.
- the transmission link may include potassium-doped fiber, pump laser, input detector, and output detector. Of course, these are only a few exemplary main components.
- the transmission link in the potassium-doped fiber amplifier may also include a gain flattening filter (GFF), a variable optical attenuator (VOA), and an optical switch (SW) for leveling the gain spectrum of the optical amplifier. No further examples of the components in the potassium-doped fiber amplifier will be given here.
- GFF gain flattening filter
- VOA variable optical attenuator
- SW optical switch
- potassium-doped fiber amplifiers are also diverse, including but not limited to variable gain amplifiers (VGA) and switchable gain amplifiers (SGA). No further examples of the functional types will be given here.
- VGA variable gain amplifiers
- SGA switchable gain amplifiers
- the internal structures of potassium-doped fiber amplifiers vary depending on their functional type. That is, the types of devices included and the connection relationships between devices may differ in different functional types of potassium-doped fiber amplifiers.
- the control component can be implemented as software, hardware, or a combination of software and hardware.
- functional logic can be added to the control component in the potassium-doped fiber amplifier so that the control component can execute the optical transmission amplification method provided in this embodiment. It should be understood that the functional logic added to the control component in this embodiment will not interfere with the original functional logic in the control component.
- step 100 the input optical signal received by the potassium-doped fiber amplifier can be monitored to detect line faults in the optical transmission system in a timely manner based on the input optical signal.
- a fault standard can be preset. If the input optical signal is detected to meet the fault standard, it indicates that a line fault has occurred in the optical transmission system.
- the power of the input optical signal detected by the input detector (or input optical power detector) in the potassium-doped fiber amplifier can be tracked. If the tracked power is lower than a preset power threshold, it can be determined that the input optical signal meets the fault criteria.
- step 100 if the received input optical signal is detected to meet the fault criteria, the system can switch to the new operating mode introduced for the potassium-doped fiber amplifier in this embodiment.
- the potassium-doped fiber amplifier usually operates in the AGC mode mentioned above.
- the original operating mode of the potassium-doped fiber amplifier is not limited to the AGC mode, and this embodiment does not limit it.
- the new working mode introduced in this embodiment will be described in detail below.
- the new working mode may include at least two working aspects.
- the first aspect of this new operating mode can be achieved in step 100: the input optical signal is blocked on the transmission link within the potassium-doped fiber amplifier to isolate an output unit within the potassium-doped fiber amplifier that is not affected by the input optical signal.
- blocking can be understood as intercepting the input optical signal to prevent it from continuing to transmit. It is understood that in this embodiment, the input optical signal will no longer be able to transmit to the output end of the transmission link, but will be blocked midway through transmission.
- a link connected to the output end but unaffected by the input optical signal can be isolated within the potassium-doped fiber amplifier.
- this isolated link is described as an output unit.
- the output unit may contain one or more potassium-doped fiber segments, and within the potassium-doped fiber amplifier, each potassium-doped fiber segment is usually associated with a pump laser. Therefore, the isolated output unit in this embodiment also contains the required pump laser. This enables the isolated output unit in this embodiment to provide an output optical signal.
- the second aspect of the new operating mode can be achieved in steps 101 and 102: adjusting the output power of the isolated output unit so that the potassium-doped fiber amplifier maintains a stable output power.
- the desired output power can be determined in step 101.
- the desired output power is the output power that the potassium-doped fiber amplifier is expected to provide after a line fault is detected.
- various implementation methods can be used to determine the desired output power. Several exemplary implementation methods are provided below.
- the output power of the potassium-doped fiber amplifier prior to fault detection can be obtained.
- the desired output power As the desired output power.
- the output power detected by the output detector in the potassium-doped fiber amplifier can be tracked, so that the output power tracked before the fault is detected can be used as the desired output power.
- the last output power detected by the output detector before the fault is detected can be used as the desired output power; or, the average, median, or maximum value of multiple output powers detected by the output detector in the last detection cycle before the fault is detected can be used as the desired output power. There is no limitation on how the tracked output power is selected.
- the determined expected output power will be consistent with the output power provided by the potassium-doped fiber amplifier before the fault is detected. Therefore, from the output perspective of the potassium-doped fiber amplifier, the output power provided before/after the fault is detected is consistent, so that the potassium-doped fiber amplifier can maintain a stable output power.
- the output power preset for the output unit can be used as the desired output power.
- the output power of the potassium-doped fiber amplifier remains basically unchanged when there is no increase or decrease in the number of channels in the optical transmission system. Therefore, this fixed output power in the potassium-doped fiber amplifier can be preset as the desired output power required in step 101.
- the desired output power can also be preset to other values, as long as the performance stability of the optical transmission system can be guaranteed, which is not limited here.
- the output power set by the output unit can be used as a configuration parameter and configured into the control component of the potassium-doped fiber amplifier. The control component can directly use this output power as the desired output power.
- the desired output power can be calculated based on the power spectral density preset for the output unit.
- the power spectral density is a function describing the change of signal power with frequency, representing the power distribution of the signal at different frequencies. In the frequency domain, power can be calculated by integrating the power spectral density with the frequency range, and the result of the integration is the power of the signal. It can be seen that this exemplary implementation is similar to the previous exemplary implementation, but the power is indirectly characterized by the power spectral density. In practical applications, the output power or the power spectral density can be preset for the output unit according to the structure of the potassium-doped fiber amplifier or the type of signal to be processed, etc., without limitation here.
- the expected output power determined in this embodiment should be able to ensure the performance stability of the optical transmission system.
- the output unit isolated in step 100 is independent and has the ability to provide output optical signals. Therefore, in this embodiment, it is proposed that the output unit can be used to provide the desired output power.
- the output unit can generate an output optical signal based on the potassium-doped fiber contained in the output unit and the pump laser used. Moreover, the output optical signal generated by the output unit is adjustable. Therefore, in this embodiment, the output unit can support providing the desired output power. [62] Based on this, in step 102, during a fault, the output unit can be controlled to generate an output optical signal according to the desired output power.
- control method of the output unit is not limited, as long as it can ensure that the output unit maintains the expected output power during the fault period.
- the pump power applied to the potassium-doped fiber contained in the output unit can be adjusted so that the output optical signal generated by the output unit matches the desired output power.
- the isolated output unit in this embodiment contains one or more potassium-doped optical fibers. Based on this, the output power of the output unit can be adjusted by adjusting the pump power applied to the potassium-doped optical fibers contained in the output unit.
- the output unit can generate an output optical signal without relying on any input optical signal, but through the signal generation principle of the potassium-doped fiber itself.
- the inventors discovered that applying pump power to the potassium-doped fiber in the absence of an input optical signal can lead to the generation of spontaneous emission noise (ASE) in the potassium-doped fiber, and the power of this spontaneous emission noise can vary with the applied pump power. Therefore, in this reliable implementation, the power of the ASE noise generated in the output unit can be made to meet the aforementioned desired output power by reasonably controlling the pump power applied to the potassium-doped fiber contained in the output unit. That is, in this reliable implementation, the output optical signal generated by the output unit is entirely ASE noise, and the power of the generated ASE noise meets the desired output power.
- a feedback mechanism can be used to regulate the output unit.
- This feedback mechanism can be: based on the difference between the output power detected by the output detector in the potassium-doped fiber amplifier and the desired output power, the pump laser used by the output unit is adjusted until the output detector detects that the output unit meets the desired output power.
- the pump setting parameters of the pump laser used by the output unit are adjusted. When the pump setting parameters change, the pump power provided by the pump laser will change.
- the pump setting parameters may include, but are not limited to, parameters affecting the pump power such as the bias current value; further examples are not provided here.
- the output unit may use one or more pump lasers. In this feedback mechanism, each pump laser used by the output unit will be jointly adjusted so that the ASE noise jointly generated by one or more potassium-doped fibers in the output unit can meet the desired output power.
- a preferred solution is to record the pump setting parameters obtained after the feedback adjustment as the pump setting parameters corresponding to the output unit. Based on this, after determining the desired output power, a control command can be sent to the pump laser used by the output unit according to the pump setting parameters recorded for the output unit, so as to control the pump laser to adjust the pump power applied to the potassium-doped fiber contained in the output unit. In this way, the time consumption caused by the aforementioned feedback adjustment can be eliminated, and the pump laser used by the output unit can be adjusted to the appropriate pump setting parameters in one step. This allows the pump laser to quickly switch to the appropriate pump power, thereby This allows the output unit to achieve the desired output power more efficiently.
- a dedicated optical signal with a stable input power can be provided to the isolated output unit.
- the input power of the dedicated optical signal can be consistent with the input power of the input optical signal before the fault was detected.
- the dedicated optical signal can carry dedicated test data or may not carry any data content to avoid affecting the data layer of the optical transmission system. No further examples of implementation methods will be given here.
- both of the above-mentioned working aspects are implemented by the control component in the potassium-doped fiber amplifier. Therefore, the control component can support the simultaneous completion of the above two working aspects, thereby ensuring that the boundary between the original working mode of the potassium-doped fiber amplifier and the new working mode introduced in this embodiment is clear and there will be no cross-influence. From the output perspective of the potassium-doped fiber amplifier, the output power remains stable when the working mode is switched.
- the output power of the output unit in this embodiment will not be affected before the fault is cleared, regardless of how the optical signal on the faulty optical cable changes (the optical signal may change due to events such as optical cable maintenance or fault testing). Therefore, the output unit in this embodiment can stably maintain the expected output power during the fault period.
- the optical transmission system is a multi-band wavelength division multiplexing (WDM) system
- WDM wavelength division multiplexing
- the output power of the potassium-doped fiber amplifier can remain stable, which can ensure the stability of the output power of the OMS where it is located, and therefore, it will no longer affect the transmission performance of the downstream OMS.
- this embodiment proposes a new operating mode in the potassium-doped fiber amplifier, which can enter this operating mode when a line fault is detected.
- the input optical signal can be blocked on the transmission link within the potassium-doped fiber amplifier, thereby isolating an output unit that is not affected by the input optical signal within the potassium-doped fiber amplifier.
- the output unit can be controlled to generate an output optical signal according to the desired output power.
- the potassium-doped fiber amplifier can decouple the output power from the input optical signal based on this operating mode, and the output power is no longer affected by the input optical signal.
- the potassium-doped fiber amplifier can still maintain a stable output power, thereby ensuring the performance stability of the optical transmission system.
- various implementation methods can be used to block the input optical signal on the transmission link within the potassium-doped fiber amplifier.
- a preferred implementation method is provided below: a target device pre-selected on the transmission link is adjusted to a target state so as to block the input optical signal through the target device.
- the target device can be any device on the transmission link that has signal blocking capability.
- the target device may include, but is not limited to, a dimming attenuator VOA or an optical switch SW, etc., without further examples.
- the dimming attenuator is controlled to switch to the isolation state (i.e., the target state) to block the input optical signal; if the target device includes an optical switch, the optical switch is controlled to switch to a preset position (i.e., the target state) to block the input optical signal.
- the selection scheme of the target device can be adaptively set according to the internal structure of the potassium-doped fiber amplifier.
- the selection scheme of the target device will be explained in detail below in two cases.
- the potassium-doped fiber amplifier can be modified in terms of hardware.
- FIG. 3 provides a schematic diagram of the internal structure of a potassium-doped fiber amplifier after hardware modification.
- an exemplary hardware modification scheme may be: adding a dedicated unit to the potassium-doped fiber amplifier, the dedicated unit may contain at least one or more segments of potassium-doped fiber, and the dedicated unit may also use a pump laser (either reuse the original pump laser in the potassium-doped fiber amplifier or add a dedicated pump laser); adding a target optical switch to the transmission link in the potassium-doped fiber amplifier, the target optical switch may contain a first position for conducting the transmission link, and may also contain a second position for conducting the dedicated unit and the link portion of the transmission link located after the target optical switch.
- the target optical switch can be pre-selected as the target device.
- the dedicated unit constitutes the output unit.
- the dedicated unit is independent of the transmission link within the potassium-doped fiber amplifier, that is, the dedicated unit is dedicated.
- the default pump setting parameters of the pump laser dedicated to the dedicated unit are set to pump setting parameters adapted to the desired output power, which allows the desired output power to be generated by default when the dedicated unit is started. In this way, the potassium-doped fiber amplifier can be guaranteed to generate the desired output power when the dedicated unit is started before or simultaneously with the target light development switching to the second gear.
- Figures 4-6 provide schematic diagrams of the internal structures of several potassium-doped fiber amplifiers without hardware modifications. During the research process, the inventors discovered that the internal structures of different models of potassium-doped fiber amplifiers differ. Therefore, the selection scheme of the target device can be adaptively set for different models of potassium-doped fiber amplifiers.
- Figure 4 provides an exemplary internal structure diagram of a potassium-doped fiber amplifier with adjustable gain.
- the transmission link of the potassium-doped fiber amplifier includes a modulation attenuator (VOA).
- VOA modulation attenuator
- the VOA on the transmission link can be selected as the target device, and the isolation state can be used as the target state of the VOA.
- the transmission link is divided into two parts. After the division, the link part that is still connected to the output end (the dashed box part in Figure 4) becomes the output unit. It can be seen that the input optical signal will be blocked at the modulation attenuator.
- FIG. 5 provides an exemplary internal structure diagram of a potassium-doped fiber amplifier with adjustable gain range.
- the transmission link of the potassium-doped fiber amplifier includes a modulation attenuator (VOA) and an optical switch.
- VOA modulation attenuator
- the isolation state can be used as the target state of the VOA.
- the transmission link is divided into two parts. After the division, the link part that is still connected to the output end (the dashed box part in Figure 5) constitutes the output unit. It can be seen that the input optical signal will be blocked at the modulation attenuator.
- Figure 6 provides another exemplary internal structure schematic diagram of a potassium-doped fiber amplifier with adjustable gain range.
- the transmission link of the potassium-doped fiber amplifier includes an optical switch.
- the optical switch on the transmission link can be selected as the target device, and the selected optical switch can be switched to a preset position to achieve the segmentation of the transmission link, thereby blocking the input optical signal.
- One blocking method is to place the optical switch 1 in the neutral position (that is, it will not be placed in position 1 or position 2, but will be unloaded), so that the transmission link can be segmented by the optical switch 1 as the segmentation point.
- the optical switch 2 can be placed in any position.
- optical switch 1 can be set to position 1
- optical switch 2 can be set to position 2. In this way, the output optical signal will be generated by the potassium-doped optical fiber 2.
- the internal structures of the above-mentioned potassium-doped fiber amplifiers are merely exemplary, and the target device selection schemes used in these types of internal structures are also merely exemplary. This embodiment is not limited thereto.
- a selection scheme adapted to their internal structure can be set in the control components, so that the control components in the potassium-doped fiber amplifier can select target devices without obstacles and reasonably.
- the transmission link after adjusting the selected target device on the transmission link to the target state, the transmission link can be segmented, thereby blocking the input optical signal.
- the part of the transmission link that is still connected to the output end after segmentation becomes the output unit. It is worth noting that by reasonably designing the selection scheme of the target device, it can be ensured that the output unit obtained after segmentation can contain potassium-doped fiber and can use a pump laser.
- a target device can be selected on the transmission link, and the target device can be adjusted to the target state.
- the target device is used to block the input optical signal.
- the pump power on (for example, the first segment) is used to render the output of that potassium-doped fiber completely dark. In this way, the input optical signal can be blocked through that potassium-doped fiber segment, and the link section following that segment becomes the output unit. Further examples of implementation methods are not provided here.
- the potassium-doped fiber amplifier when the potassium-doped fiber amplifier is in the aforementioned new operating mode, if the fault is detected to have been cleared, it can switch back from the new operating mode to the original operating mode in which the potassium-doped fiber amplifier was before the fault was detected (e.g., the AGC mode mentioned above).
- the process of switching back from the new operating mode to the original operating mode of the potassium-doped fiber amplifier before the fault was detected can be understood as restoring the changes implemented during the switch from the original operating mode to the new operating mode to their original state.
- this embodiment proposes: if the received input optical signal is detected to no longer meet the fault criteria, then the blocking of the input optical signal is lifted; and the pump laser required for the transmission link is restored to its state before the fault.
- the target device on the transmission link used to block the input optical signal can be restored to its state (i.e., restored from the aforementioned target state to the state before adjustment) to release the blocking of the input optical signal.
- the pump lasers used on the transmission link may have been modulated in the output unit, it is also proposed here to restore the pump lasers required by the transmission link to their state before the fault. In this way, the transmission link in the potassium-doped fiber amplifier can be restored to the state before the fault was detected, and thus, the working capability before the fault was detected can be restored, that is, the amplification processing of the input optical signal can be restored.
- the switching of the operating mode is implemented by the control component in the potassium-doped fiber amplifier. Therefore, when switching back from the new operating mode to the original operating mode in which the potassium-doped fiber amplifier was before the fault was detected, the control component can also support the aforementioned "unblocking of the input optical signal" and "restoring the pump laser required for the transmission link to the state before the fault". These two operations are completed simultaneously, thereby avoiding cross-influence between the two operating modes, and thus ensuring that the potassium-doped fiber amplifier can maintain stable output power when switching operating modes.
- FIG7 is a schematic diagram of a potassium-doped fiber amplifier provided in another exemplary embodiment of the present disclosure.
- the potassium-doped fiber amplifier may include: a control component 70 and a transmission link 80.
- control component 70 is used to execute one or more computer program instructions to: if the received input optical signal is detected to meet the fault criteria, block the input optical signal on the transmission link 80 in the potassium-doped fiber amplifier to isolate an output unit 90 in the potassium-doped fiber amplifier that is not affected by the input optical signal; determine the desired output power for the potassium-doped fiber amplifier; and during the fault period, control the output unit 90 to generate an output optical signal according to the desired output power.
- control component 70 when the control component 70 blocks the input optical signal on the transmission link within the potassium-doped fiber amplifier, it may specifically be used to: adjust a pre-selected target device on the transmission link 80 to a target state so as to block the input optical signal through the target device.
- control component 70 when the control component 70 adjusts the target device pre-selected on the transmission link to the target state, it can be specifically used to: if the target device includes a dimming attenuator, control the dimming attenuator to switch to the isolation state to block the input optical signal; if the target device includes an optical switch, control the optical switch to switch to a preset position to block the input optical signal.
- a dedicated unit is added to the potassium-doped fiber amplifier, and a target optical switch is added to the transmission link 80 as the target device; the target optical switch includes a first position for conducting the transmission link 80, and also includes a second position for conducting the dedicated unit and the link portion of the transmission link 80 located after the target optical switch; when the target optical switch is switched to the second position, the dedicated unit constitutes the output unit 90.
- the link portion of the transmission link 80 that is still connected to the output end constitutes the output unit 90.
- control component 70 when determining the desired output power, may specifically be used to: obtain the output power of the potassium-doped fiber amplifier before the fault is detected, as the desired output power; or, use the output power preset for the output unit as the desired output power; or, calculate the desired output power based on the power spectral density preset for the output unit.
- the output unit 90 includes a potassium-doped fiber 91.
- the control component 70 controls the output unit 90 to generate an output optical signal according to the desired output power, it can specifically be used to: adjust the pump power applied to the potassium-doped fiber 91 included in the output unit 90, so that the output signal generated by the output unit 90... The emitted light signal meets the desired output power.
- control component 70 when adjusting the pump power applied to the potassium-doped fiber 91 contained in the output unit 90, the control component 70 may specifically be configured to: send a control command to the pump laser 92 used by the output unit 90 according to the pump setting parameters recorded for the output unit 90, so as to control the pump laser to adjust the pump power applied to the potassium-doped fiber contained in the output unit; wherein the pump setting parameters are calculated based on the desired output power.
- control component 70 may also be used to: perform feedback adjustment on the pump laser 92 based on the difference between the output power detected by the output detector in the potassium-doped fiber amplifier and the desired output power, until the output detector detects that the output light signal generated by the output unit 90 meets the desired output power; and record the pump setting parameters obtained after the feedback adjustment is completed as the pump setting parameters corresponding to the output unit 90.
- control component 70 may also be used to: if it is detected that the received input optical signal no longer meets the fault criteria, then release the blocking of the input optical signal; restore the pump laser required by the transmission link 80 to the pump power before the fault, so that the potassium-doped fiber amplifier can resume the amplification processing of the input optical signal.
- control component 70 when the control component 70 releases the blockage of the input optical signal, it may specifically be used to: restore the target device on the transmission link 80 used to block the input optical signal from the target state to the state before adjustment, so as to release the blockage of the input optical signal; wherein, after detecting that the received input optical signal meets the fault criteria, the target device has been adjusted to the target state to block the input optical signal.
- the two operations of unblocking the input optical signal and restoring the pump laser required for the transmission link to its pre-fault state are performed simultaneously.
- the transmission link 80 of the potassium-doped fiber amplifier may also include other devices such as a dimming attenuator 81, an optical switch 82, and a potassium-doped fiber 83.
- FIG7 only schematically shows some devices and does not mean that the potassium-doped fiber amplifier only includes the devices shown in FIG7.
- FIG. 8 is a schematic diagram of a control device provided in an exemplary embodiment of the present disclosure.
- the control device can be integrated into the control components of a potassium-doped fiber amplifier.
- the control device may include: a mode switching module 10, configured to trigger an isolation module 20 if the input optical signal received by the potassium-doped fiber amplifier meets a fault criterion; the isolation module 20, configured to block the input optical signal on the transmission link within the potassium-doped fiber amplifier, so as to...
- the potassium-doped fiber amplifier isolates an output unit unaffected by the input optical signal; the output configuration module 30 is configured to determine the desired output power for the potassium-doped fiber amplifier; the output control module 40 is configured to control the output unit to generate an output optical signal according to the desired output power during a fault.
- the isolation module 20 may be specifically configured to: adjust a target device pre-selected on the transmission link to a target state so as to block the input optical signal through the target device.
- the isolation module 20 may be specifically configured as follows: if the target device includes a dimming attenuator, the dimming attenuator is controlled to switch to the isolation state to block the input optical signal; if the target device includes an optical switch, the optical switch is controlled to switch to a preset position to block the input optical signal.
- a dedicated unit is added to the potassium-doped fiber amplifier, and a target optical switch is added to the transmission link as the target device; the target optical switch includes a first position for conducting the transmission link, and also includes a second position for conducting the dedicated unit and the link portion of the transmission link located after the target optical switch; when the target optical switch is switched to the second position, the dedicated unit constitutes the output unit.
- the link portion of the transmission link that is still connected to the output end when the target device in the potassium-doped fiber amplifier is adjusted to the target state constitutes the output unit.
- the output configuration module 30 may be specifically configured to: obtain the output power of the potassium-doped fiber amplifier before the fault is detected, as the expected output power; or, use the output power pre-set for the output unit as the expected output power; or, calculate the expected output power based on the power spectral density pre-set for the output unit.
- the output unit includes potassium-doped optical fiber
- the output control module 40 may be specifically configured to: adjust the pump power applied to the potassium-doped optical fiber included in the output unit so that the output optical signal generated by the output unit conforms to the desired output power.
- the output control module 40 may be specifically configured to: send a control command to the pump laser used by the output unit according to the pump setting parameters recorded for the output unit, so as to control the pump laser to adjust the pump power applied to the potassium-doped fiber contained in the output unit; wherein the pump setting parameters are calculated based on the desired output power.
- the output control module 40 may further be configured to: perform feedback adjustment on the pump laser based on the difference between the output power detected by the output detector in the potassium-doped fiber amplifier and the desired output power, until the output detector detects that the output light signal generated by the output unit meets the desired output power; and record the pump setting parameters obtained after the feedback adjustment is completed as the pump settings corresponding to the output unit. Set parameters.
- the mode switching module 10 may also be configured to trigger the isolation module 20 to release the blocking of the input optical signal if the received input optical signal is detected to no longer meet the fault criteria; the output control module 40 may also be configured to restore the pump laser required by the transmission link to the pump power before the fault, so that the potassium-doped fiber amplifier can resume the amplification processing of the input optical signal.
- the isolation module 20 may be configured to: restore the target device on the transmission link used to block the input optical signal from the target state to the state before adjustment, so as to release the blocking of the input optical signal; wherein, after detecting that the received input optical signal meets the fault criteria, the target device has been adjusted to the target state to block the input optical signal.
- the two operations of unblocking the input optical signal and restoring the pump laser required for the transmission link to its pre-fault state are performed simultaneously.
- this disclosure also provides a computer-readable storage medium storing a computer program, which, when executed, can implement the steps in the above method embodiments.
- this disclosure also provides a computer program product, wherein the computer program contained herein, when executed, can implement the steps in the above method embodiments.
- These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and/or one or more block diagrams.
- These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and/or one or more block diagrams.
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Abstract
本公开实施例提供一种光传输放大方法、光放大器、计算机程序产品及存储介质。提出在掺铒光纤放大器中设计一种新的工作模式,掺铒光纤放大器可在监测到线路故障时,进入该工作模式。在该工作模式下,可在掺铒光纤放大器内的传输链路上对输入光信号进行阻断,从而可在掺铒光纤放大器内隔离出不受输入光信号影响的输出单元;在此基础上,可在故障期间,控制该输出单元按照期望输出功率,生成输出光信号。
Description
一种光传输放大方法、 光放大器、 计算机程序产品及存储介质 技术领域
[01]本公开涉及通信技术领域, 尤其涉及一种光传输放大方法、 光放大器、 计算机程序 产品及存储介质。 背景技术
[02]掺钾光纤放大器 ( Erbium-Doped Fiber Amplifier, EDFA ) , 是光传输系统中常用的 一种放大器, 用于增强光信号的强度, 提高光信号传输的距离和质量。
[03]在光传输系统中, EDFA通常工作在自动增益控制 ( Automatic Gain Control, AGC ) 模式, 在该模式下, EDFA可为工作范围内的输入光信号提供恒定的放大增益。
[04]目前,在光传输系统中发生线路故障的情况下, AGC模式下的处置方案通常是关闭 EDFA 中的泵浦激光器 ,这导致 EDFA中的掺钾光纤失去了激发源,相当于关闭了 EDFA 的输出,这可能影响光传输系统中部分光复用段 (Optical Multiplex Section, OMS) 或部 分波段的传输性能, 进而造成光传输系统的性能不稳定。 发明内容
[05]本公开的多个方面提供一种光传输放大方法、 光放大器、 计算机程序产品及存储介 质, 用以改善光传输系统在发生线路故障时的性能稳定性。
[06]本公开实施例提供一种光传输放大方法, 适用于掺钾光纤放大器, 所述方法包括: 若监测到所接收到的输入光信号符合故障标准,则在所述掺钾光纤放大器内的传输链路 上, 阻断所述输入光信号, 以在所述掺钾光纤放大器内隔离出不受所述输入光信号影响 的输出单元; 为所述掺钾光纤放大器, 确定期望输出功率; 在故障期间, 控制所述输出 单元按照所述期望输出功率, 生成输出光信号。
[07]进一步地, 在所述掺钾光纤放大器内的传输链路上, 阻断所述输入光信号, 包括: 将在所述传输链路上预先选定的目标器件, 调整至目标状态, 以通过所述目标器件阻断 所述输入光信号。
[08]进一步地, 将在所述传输链路上预先选定的目标器件, 调整至目标状态, 包括: 若 所述目标器件包括调光衰减器, 则控制所述调光衰减器切换至隔离状态, 以阻断所述输 入光信号; 若所述目标器件包括光开关, 则控制所述光开关切换至预设档位, 以阻断所 述输入光信号。
[09]进一步地, 所述掺钾光纤放大器中增设有专用单元, 所述传输链路上增设有目标光 开关, 作为所述目标器件; 所述目标光开关中包含用于导通所述传输链路的第一档位, 还包含用于将所述专用单元和 所述传输链路中位于所述目标光开关之后的链路部分进 行导通的第二档位; 所述目标光开关切换至所述第二档位时, 所述专用单元构成所述输 出单元。
[10]进一步地, 若未在所述掺钾光纤放大器中增设新组件, 则所述掺钾光纤放大器中的 所述目标器件调整至所述目标状态时, 所述传输链路上仍与输出端导通的链路部分, 构 成所述输出单元。
[11]进一步地, 确定期望输出功率, 包括: 获取所述掺钾光纤放大器在监测到故障之前 的输出功率,作为所述期望输出功率;或者,将预先为所述输出单元所设定的输出功率, 作为所述期望输出功率; 或者, 基于预先为所述输出单元所设定的功率谱密度, 计算出 所述期望输出功率。
[12]进一步地, 所述输出单元中包含掺钾光纤, 控制所述输出单元按照所述期望输出功 率,生成输出光信号,包括 :调整向所述输出单元内包含的掺钾光纤所施加的泵浦功率, 以使所述输出单元生成的输出光信号符合所述期望输出功率。
[13]进一步地, 调整向所述输出单元内包含的掺钾光纤所施加的泵浦功率, 包括: 按照 为所述输出单元所记录的泵浦设置参数, 向所述输出单元所使用的泵浦激光器发送控制 指令, 以控制所述泵浦激光器调整向所述输出单元内包含的掺钾光纤所施加的泵浦功率; 其中, 所述泵浦设置参数是基于所述期望输出功率所计算出的。
[14]进一步地, 所述方法还包括: 基于所述掺钾光纤放大器中的输出检测器所检测到的 输出功率与所述期望输出功率之间的差值, 对所述泵浦激光器进行反馈调整, 直至所述 输出检测器检测到所述输出单元生成的输出光信号符合所述期望输出功率; 将反馈调整 结束后所获得的泵浦设置参数, 记录为所述输出单元对应的泵浦设置参数。
[15]进一步地, 所述方法还包括: 若监测到所接收到的输入光信号不再符合所述故障标 准, 则解除对所述输入光信号的阻断; 将所述传输链路所需使用的泵浦激光器恢复至故 障前的泵浦功率, 以使所述掺钾光纤放大器恢复对所述输入光信号的放大处理。
[16]进一步地, 解除对所述输入光信号的阻断, 包括: 将所述传输链路上用于阻断所述 输入光信号的目标器件, 从目标状态恢复至调整前的状态, 以解除对所述输入光信号的 阻断; 其中, 在监测到所接收到的输入光信号符合故障标准后, 已将所述目标器件调整 至所述目标状态, 以阻断所述输入光信号。
[17]进一步地, 所述解除对所述输入光信号的阻断, 和所述将所述传输链路所需使用的
泵浦激光器恢复至故障前的状态, 两项操作同步完成。
[18]本公开实施例还提供一种掺钾光纤放大器, 包含控制组件和传输链路, 所述控制组 件用于执行一条或多条计算机指令, 以用于执行前述的光传输放大方法。
[19]本公开实施例还提供一种存储计算机程序的计算机可读存储介质, 当所述计算机程 序被一个或多个处理器执行时,致使所述一个或多个处理器执行前述的光传输放大方法。
[20]本公开实施例还提供一种计算机程序产品, 包括计算机程序, 当所述计算机程序被 一个或多个处理器执行时, 致使所述一个或多个处理器执行前述光传输放大方法。
[21]在本公开实施例中, 提出在掺钾光纤放大器中设计一种新的工作模式, 掺钾光纤放 大器可在监测到线路故障时, 进入该工作模式。 在该工作模式下, 可在掺钾光纤放大器 内的传输链路上对输入光信号进行阻断,从而可在掺钾光纤放大器内隔离出不受输入光 信号影响的输出单元;在此基础上,可在故障期间,控制该输出单元按照期望输出功率, 生成输出光信号。 这样, 在光传输系统中出现线路故障的情况下, 掺钾光纤放大器可基 于该工作模式实现输出功率与输入光信号之间解耦,输出功率不再受到输入光信号的影 响, 因此, 掺钾光纤放大器仍可维持稳定的输出功率, 从而保障光传输系统的性能稳定 性。 附图说明
[22]此处所说明的附图用来提供对本公开的进一步理解, 构成本公开的一部分, 本公开 的示意性实施例及其说明用于解释本公开, 并不构成对本公开的不当限定。 在附图中:
[23]图 1为本公开一示例性实施例提供的一种光传输放大方法的流程示意图;
[24]图 2提供了一种掺钾光纤放大器的常规结构示意图;
[25]图 3提供了一种硬件改造后的掺钾光纤放大器的内部结构示意图;
[26]图 4 -图 6提供了几种未进行硬件改造的掺钾光纤放大器的内部结构示意图;
[27]图 7为本公开另一示例性实施例提供的一种掺钾光纤放大器的结构示意图;
[28]图 8为本公开一示例性实施例提供的一种控制装置的结构示意图。 具体实施方式
[29]为使本公开的目的、 技术方案和优点更加清楚, 下面将结合本公开具体实施例及相 应的附图对本公开技术方案进行清楚、 完整地描述。 显然, 所描述的实施例仅是本公开 一部分实施例, 而不是全部的实施例。 基于本公开中的实施例, 本领域普通技术人员在
没有做出创造性劳动前提下所获得的所有其他实施例, 都属于本公开保护的范围。
[30]在开始对本公开各实施例提供的技术方案进行详细说明之前, 先对本公开涉及到的 几个技术概念进行解释如下。
[31]掺钾光纤放大器( Erbium-Doped Fiber Amplifier, EDFA) , 是光传输系统中常用的 一种放大器, 用于增强光信号的强度, 提高光信号传输的距离和质量。 掺钾光纤放大器 的工作原理是通过激发发射的过程来放大光。掺钾光纤放大器的主要组成部分是掺钾光 纤 ( Erbium-Doped Fiber, EDF) , 它是一种由二氧化硅制成的光纤, 并掺入了少量的稀 土元素钾离子 (Er3+) 。
[32]泵浦激光器( Pump) , 是一种基于激光放大原理的装置, 它用于输出激光。 泵浦激 光器是掺钾光纤放大器中的常用器件, 在掺钾光纤放大器中, 泵浦激光器所输出的激光 可用于向掺钾光纤提供泵浦功率, 以激发掺钾光纤中的钾离子, 进而支持掺钾光纤对光 信号进行放大。
[33]自动增益控制 (Automatic Gain Control, AGO , 是掺钾光纤放大器的一种典型工 作模式。 在该工作模式下, 掺钾光纤放大器可为工作范围内的输入光信号提供恒定的放 大增益。 在光传输系统中, 掺钾光纤放大器通常就保持在该工作模式下。
[34]正如背景技术中介绍的, 光传输系统在发生线路故障的情况下, 掺钾光纤放大器在 AGC 工作模式下通常会关闭泵浦激光器。 基于掺钾光纤放大器的工作原理可知, 在泵 浦激光器被关闭后, 掺钾光纤放大器内的掺钾光纤将失去激发源, 这相当于关闭了掺钾 光纤放大器的输出。
[35]发明人在研究过程中发现, 这种通过将掺钾光纤放大器的输出关闭来应对线路故障 的解决方式, 会导致光传输系统的传输性能不稳定。 一种示例性的故障场景中: 若光传 输系统为多波段波分复用( WDM)系统,在某个波段发生线路故障的情况下,按照 AGC 模式将该波段上掺钾光纤放大器的输出关闭后, 会影响其它波段的传输性能。 另一种示 例性的故障场景中:掺钾光纤放大器通常位于光复用段 (Optical Multiplex Section, OMS) 上, 按照 AGC模式将掺钾光纤放大器的输出关闭, 就可能导致掺钾光纤放大器所处的 OMS 的输 出无光。 而光传输系统中通常会包含多个 OMS, —个下游 OMS通常可能连 接多个上游 OMS。 这样, 从下游 OMS的视角来说, 若其连接的一部分上游 OMS的输 出无光, 就会影响该下游 OMS对其连接的其它 OMS的传输性能。
[36]以上两种故障场景进行示例性的, 在此不做更多示例。 但应当理解的是, AGC模式 下应对线路故障的解决方式, 会影响光传输系统的性能稳定性。
[37]为此, 本公开实施例提出了一种光传输放大方法, 用以在光传输系统发生线路故障
的情况下, 改善光传输系统的性能稳定性。
[38]本实施例提出的光传输放大方法中, 为掺钾光纤放大器引入了一种新的工作模式, 以通过该工作模式保证掺钾光纤放大器能够在遇到光传输 系统发生线路故障的情况下, 维持稳定的输出功率, 从而避免局部的线路故障对下游 OMS造成影响, 进而保障光传 输系统的性能稳定性。
[39]以下结合附图, 详细说明本公开各实施例提供的技术方案。
[40]图 1为本公开一示例性实施例提供的一种光传输放大方法的流程示意图, 该方法可 由掺钾光纤放大器执行。 参考图 1 , 该方法可包括以下步骤。
[41]步骤 100、 若监测到所接收到的输入光信号符合故障标准, 则在掺钾光纤放大器内 的传输链路上 , 阻断输入光信号, 以在掺钾光纤放大器内隔离出不受输入光信号影响的 输出单元。
[42]步骤 101、 为掺钾光纤放大器, 确定期望输出功率。
[43]步骤 102、 在故障期间, 控制输出单元按照期望输出功率, 生成输出光信号。
[44]图 2提供了一种掺钾光纤放大器的常规结构示意图。 参考图 2, 掺钾光纤放大器中 可包含控制组件和传输链路, 传输链路上可包含掺钾光纤、 泵浦激光器、 输入检测器及 输出检测器等器件。 当然, 这仅是几种示例性的主要器件, 掺钾光纤放大器内的传输链 路上还可包含用于调平光放大器增益谱的滤波器 ( Gain Flattening Filter, GFF ) 、 调光 衰减器 ( Variable Optical Attenuator, VOA ) 以及光开关 ( Switch, SW )等, 在此对掺 钾光纤放大器中的器件不做更多示例。 另外, 掺钾光纤放大器的功能类型也是多样的, 包括但不限于增益可调放大器 ( Variable Gain Amplifier, VGA )以及增益区间可调放大 器 ( Switchable Gain Amplifier, SGA )等, 在此对功能类型也不做更多示例。 不同功能 类型的掺钾光纤放大器的内部结构存在差异, 也即是, 在不同功能类型的掺钾光纤放大 器中, 所包含的器件种类可能不同, 器件之间的连接关系也可能不同。
[45]其中, 控制组件可实现为软件、 硬件或者软件与硬件的结合。 本实施例中提出, 可 在掺钾光纤放大器中的控制组件中添加功能逻辑, 以由控制组件执行本实施例提供的光 传输放大方法。 应当理解的是, 本实施例中在控制组件中所添加的功能逻辑并不会干扰 控制组件中的原有功能逻辑。
[46]参考图 1 , 在步骤 100中, 可对掺钾光纤放大器所接收到的输入光信号进行监测, 以根据输入光信号及时感知到光传输系统中的线路故障。 为此, 在步骤 100中, 可预先 设定故障标准, 若监测到输入光信号符合故障标准, 则表征光传输系统中发生了线路故 障。
[47]在一种示例性的监测方案中: 可跟踪掺钾光纤放大器中的输入检测器(或称为输入 光功率检测器)所检测到的输入光信号的功率, 若跟踪到的功率低于预设功率阈值, 则 可确定输入光信号符合故障标准。 应当理解的是, 这仅是示例性的, 本实施例中还可采 用其它监测方案, 以及时感知到光传输系统中的线路故障。 例如, 可在监测到输入光信 号的功率波动程度出现异常的情况下, 确定光传输系统中发生线路故障, 等。 在此不做 更多示例。
[48]在步骤 100中, 若监测到所接收到的输入光信号符合故障标准, 则可切换至本实施 例中为掺钾光纤放大器所引入的新工作模式。 应当理解的是, 在切换至本实施例中的新 工作模式之前, 掺钾光纤放大器通常工作在前文提及的 AGC模式, 当然, 掺钾光纤放 大器原本所处的工作模式并不限于 AGC模 式, 本实施例对此不做限定。
[49]以下对本实施例所引入的新工作模式进行展开说明。 本实施例中, 该新工作模式下 可包含至少两个工作方面。
[50]参考图 1 , 在步骤 100中可实现该新工作模式下的第一个工作方面: 在掺钾光纤放 大器内的传输链路上 , 阻断输入光信号, 以在掺钾光纤放大器内隔离出不受输入光信号 影响的输出单元。
[51]其中, 这里的阻断, 可理解为对输入光信号进行拦截, 以禁止其继续向后传输。 可 知, 本实施例中, 输入光信号将无法再传输到传输链路的输出端, 而是在传输中途即被 阻断。 这样, 在掺钾光纤放大器内即可隔离出一段与输出端导通但却不受输入光信号影 响的链路, 本实施例中, 将隔离出的这段链路描述为输出单元。 本实施例中, 输出单元 中可包含一段或多段掺钾光纤, 而在掺钾光纤放大器内, 每段掺钾光纤又通常关联有泵 浦激光器, 因此, 本实施例中隔离出的输出单元中也包含所需使用的泵浦激光器。 这使 得本实施例中隔离出的输出单元具备提供输出光信号的能力。
[52]可以理解的是, 本实施例中, 输入光信号已被阻断在输出单元之外, 因此, 输出单 元也就不会再受到输入光信号的影响,这使得在该新工作模式下所获得的输出单元具备 独立性。
[53]继续参考图 1 ,在步骤 101和步骤 102中可实现该新工作模式下的第二个工作方面: 调控所隔离出的输出单元的输出功率, 以使掺钾光纤放大器维持稳定的输出功率。
[54]本实施例中, 在步骤 101中可确定期望输出功率。 这里, 期望输出功率, 即为期望 掺钾光纤放大器在监测到线路故障后仍能提供的输出功率。本实施例中可采用多种实现 方式来确定出期望输出功率。 以下提供几种示例性实现方式。
[55]在一种示例性实现方式中: 可获取掺钾光纤放大器在监测到故障之前的输出功率,
作为期望输出功率。 在该示例性的实现方式中, 可跟踪掺钾光纤放大器中的输出检测器 所检测到的输出功率, 从而可将在监测到故障之前所跟踪到的输出功率, 作为期望输出 功率。 实际应用中, 可将监测到故障之前输出检测器所检测到的最后一次输出功率, 作 为期望输出功率; 或者, 可将监测到故障之前输出检测器在最后一个检测周期中检测到 的多个输出功率的平均值、 中值或最值等, 作为期望输出功率, 在此对如何选用所跟踪 到的输出功率不做限定。
[56]在该示例性的实现方式中, 所确定出的期望输出功率将与掺钾光纤放大器在监测到 故障之前所提供的输出功率保持一致, 因此, 从掺钾光纤放大器的输出视角来看, 在监 测到故障前 /后所提供的输出功率是一致的,这样,掺钾光纤放大器可维持稳定的输出功 率。
[57]在另一种示例性实现方式中: 可将预先为输出单元所设定的输出功率, 作为期望输 出功率。 发明人在研究过程中发现, 在光传输系统中未发生波道增减的情况下, 掺钾光 纤放大器的输出功率基本是保持不变的, 因此, 可将掺钾光纤放大器中这种固定的输出 功率, 预设为步骤 101中所需的期望输出功率。 当然, 还可将期望输出功率预设为其它 数值, 能够保障光传输系统的性能稳定性即可, 在此不做限定。 实际应用中, 可将输出 单元所设定的输出功率作为配置参数, 配置到掺钾光纤放大器的控制组件中, 控制组件 可直接取用到该输出功率, 作为期望输出功率。
[58]在又一种示例性实现方式中: 可基于预先为输出单元所设定的功率谱密度, 计算出 期望输出功率。 功率谱密度是描述信号功率随频率变化的函数, 它表示了信号在不同频 率上的功率分布情况。 在频域上, 功率可以通过将功率谱密度与频率范围进行积分来计 算, 积分得到的结果即为信号的功率。 可知, 该示例性实现方式与上一种示例性实现方 式类似, 不过用功率谱密度的方式来间接地表征功率。 实际应用中, 可根据掺钾光纤放 大器的结构或所需处理的信号类型等,灵活决定为输出单元预设输出功率还是预设功率 谱密度, 在此不做限定。
[59]无论采用哪种示例性实现方式, 本实施例中所确定出的期望输出功率, 应能够保障 光传输系统的性能稳定性。
[60]正如前文提及的, 在步骤 100中所隔离出的输出单元具备独立性且具备提供输出光 信号的能力, 因此, 本实施例中提出, 可利用输出单元提供期望输出功率。
[61]发明人在研究过程中发现, 尽管对于输出单元来说, 不会再接收到光传输系统中传 输至掺钾光纤放大器的输入光信号,但是基于输出单元中包含的掺钾光纤和所使用的泵 浦激光器, 输出单元是可以生成输出光信号的, 而且, 输出单元所生成的输出光信号是 可调控的, 因此, 本实施例中, 输出单元能够支持提供期望输出功率。
[62]基于此, 在步骤 102中, 可在故障期间, 控制输出单元按照期望输出功率, 生成输 出光信号。
[63]本实施例中, 不限定对输出单元的控制方式, 能够保证在故障期间输出单元维持提 供期望输出功率即可。
[64]在一种可选实现方式中: 可调整向输出单元内包含的掺钾光纤所施加的泵浦功率, 以使输出单元生成的输出光信号符合期望输出功率。
[65]在该可选实现方式中, 正如前文提及的, 本实施例中所隔离出的输出单元中包含有 一段或多段掺钾光纤, 基于此, 调整向输出单元内包含的掺钾光纤所施加的泵浦功率, 即可调整输出单元的输出功率。
[66]可以理解的是, 在该可选实现方式中, 输出单元可不依赖任何输入光信号, 而通过 掺钾光纤本身的信号生成原理, 即可生成输出光信号。 发明人在研究过程中发现, 在不 存在输入光信号的情况下, 向掺钾光纤施加泵浦功率, 可导致掺钾光纤中产生自发辐射 噪声 ( Amplified Spontaneous Emission, ASE ) , 且这种自发辐射噪声的功率可随所施 加的泵浦功率而变化。 因此, 在该可信实现方式中, 可通过合理调控向输出单元内包含 的掺钾光纤所施加的泵浦功率, 而使得输出单元内所产生的 ASE噪声的功率符合前述 的期望输出功率。 也即是, 在该种可信实现方式中, 输出单元所产生的输出光信号全部 为 ASE噪声, 且所产生的 ASE噪声的功率符合期望输出功率。
[67]在该可选实现方式中, 可采用反馈机制来对输出单元进行调控。 这里的反馈机制可 以是:基于掺钾光纤放大器中的输出检测器所检测到的输出功率与期望输出功率之间的 差值, 对输出单元所使用的泵浦激光器进行反馈调整, 直至输出检测器检测到输出单元 符合期望输出功率。 在该反馈机制, 反馈调整的是输出单元所使用的泵浦激光器的泵浦 设置参数,泵浦设置参数发生变化的情况下,泵浦激光器提供的泵浦功率就会发生变化。 其中, 泵浦设置参数可包括但不限于偏置电流值等影响泵浦功率的参数, 在此不做更多 示例。 应当理解的是, 输出单元所使用的泵浦激光器可能是一个或多个, 在该反馈机制 中将对输出单元所使用的各个泵浦激光器进行联合调整, 以使输出单元中包含的一个或 多个掺钾光纤联合产生的 ASE噪声能够符合期望输出功率。
[68]在该可选实现方式中, 一种优选方案可以是: 将反馈调整结束后所获得的泵浦设置 参数, 记录为输出单元对应的泵浦设置参数。 在此基础上, 在确定出期望输出功率后, 即可按照为输出单元所记录的泵浦设置参数, 向输出单元所使用的泵浦激光器发送控制 指令, 以控制泵浦激光器调整向输出单元内包含的掺钾光纤所施加的泵浦功率。 这样, 可省去前述的反馈调整所导致的耗时, 而是可将输出单元所使用的泵浦激光器一步到位 地调整至应有的泵浦设置参数, 这使得泵浦激光器可快速切换至应有的泵浦功率, 从而
使得输出单元能够更加高效地达到期望输出功率。
[69]应当理解的是, 上述的可选实现方式仅是示例性的, 在该可选实现方式中提供的技 术细节也是示例性的, 本实施例中还可采用其它实现方式来实现步骤 102, 而并不限于 此。例如,可在故障期间,向所隔离出的输出单元提供具有稳定输入功率的专用光信号, 通过合理设置该专用光信号的输入功率,可保障该专用光信号经过输出单元后所生成的 输出光信号能够符合期望输出功率, 示例性地, 该专用光信号的输入功率可与监测到故 障之前的输入光信号的输入功率一致, 当然, 该专用光信号中可携带专用测试数据或者 也可不携带任何数据内容, 以避对光传输系统中的数据层面带来影响。 在此不做更多实 现方式的示例。
[70]另外,本实施例中,上述两个工作方面都是由掺钾光纤放大器中的控制组件实施的, 因此, 控制组件可支持上述两个工作方面同步完成, 从而保证掺钾光纤放大器原本所处 的工作模式和本实施例中引入的新工作模式之间边界明确, 不会出现交叉影响。 而从掺 钾光纤放大器的输出视角来看, 工作模式切换时输出功率依然稳定。
[71]由于本实施例中将输入光信号阻断在输出单元之外, 因此, 在故障未解除之前, 无 论已故障的光缆上的光信号如何变动(可能因光缆维修或故障测试等事件而出现变化不 定的光信号) , 都不会影响本实施例中输出单元的输出功率, 因此, 本实施例中的输出 单元可在故障期间稳定维持在期望输出功率。
[72]承接前文中提及的两种示例性的故障场景, 一种示例性的故障场景中: 若光传输系 统为多波段波分复用 (WDM) 系统, 在某个波段发生线路故障的情况下, 基于本实施 例提供的光传输放大方法, 该波段上的掺钾光纤放大器的输出功率可保持稳定, 因此, 不再会对光传输系统中其它波段的传输性能带来影响。 而另一种示例性的故障场景中: 在发生线路故障的情况下, 基于本实施例提供的光传输放大方法, 掺钾光纤放大器的输 出功率可保持稳定,这可保障其所处 OMS的输出功率稳定,因此,不再会给下游的 OMS 的传输性能带来影响。
[73]综上, 本实施例中, 提出在掺钾光纤放大器中设计一种新的工作模式, 掺钾光纤放 大器可在监测到线路故障时, 进入该工作模式。 在该工作模式下, 可在掺钾光纤放大器 内的传输链路上对输入光信号进行阻断,从而可在掺钾光纤放大器内隔离出不受输入光 信号影响的输出单元;在此基础上,可在故障期间,控制该输出单元按照期望输出功率, 生成输出光信号。 这样, 在光传输系统中出现线路故障的情况下, 掺钾光纤放大器可基 于该工作模式实现输出功率与输入光信号之间解耦,输出功率不再受到输入光信号的影 响, 因此, 掺钾光纤放大器仍可维持稳定的输出功率, 从而保障光传输系统的性能稳定 性。
[74]在上述或下述实施例中, 可采用多种实现方式在掺钾光纤放大器内的传输链路上阻 断输入光信号。 以下提供一种优选地实现方式: 将在传输链路上预先选定的目标器件, 调整至目标状态, 以通过目标器件阻断输入光信号。
[75]在该实现方式中,目标器件可以是传输链路上具备信号阻断能力的任一器件。其中, 目标器件可包括但不限于调光衰减器 VOA或光开关 SW等, 在此不做更多示例。
[76]以上述两类示例性的目标器件为例, 在该实现方式中, 进一步提出: 若目标器件包 括调光衰减器,则控制调光衰减器切换至隔离状态(即目标状态),以阻断输入光信号; 若目标器件包括光开关, 则控制光开关切换至预设档位(即目标状态) , 以阻断输入光 信号。
[77]在该实现方式中, 可才艮据掺钾光纤放大器的内部结构, 适应性地设定目标器件的选 定方案。 以下分两种情况来对目标器件的选定方案进行展开说明。
[78]第一种情况下, 可对掺钾光纤放大器进行硬件改造。
[79]图 3提供了一种硬件改造后的掺钾光纤放大器的内部结构示意图。 参考图 3, —种 示例性的硬件改造方案可以是: 在掺钾光纤放大器中增设专用单元, 专用单元中至少可 包含一段或多段掺钾光纤, 专用单元还可使用泵浦激光器(复用掺钾光纤放大器中的原 有泵浦激光器或者增设专用的泵浦激光器均可); 在掺钾光纤放大器内的传输链路上增 设目标光开关, 目标光开关中可包含用于导通传输链路的第一档位, 还可包含用于将专 用单元和传输链路中位于目标光开关之后的链路部分进行导通的第二档位。
[80]基于此, 在这种情况下, 可预先将目标光开关选定为目标器件。 参考图 3, 在目标 光开关切换至第二档位时, 专用单元即构成输出单元。
[81]应当理解的是, 这种情况下, 专用单元是独立在掺钾光纤放大器内的传输链路之外 的, 也即是, 专用单元具备专用性。 基于这种专用性和目标光开关中第一档位和第二档 位的通路隔离能力, 在一种优选实现方案中, 将专用单元所专用的泵浦激光器的默认泵 浦设置参数, 设置为与期望输出功率相适配的泵浦设置参数, 这使得启动专用单元即可 默认产生期望输出功率。 这样, 可在目标光开发切换至第二档位之前或者与此同时, 启 动专用单元, 即可保证掺钾光纤放大器能够产生期望输出功率。
[82]第二种情况下, 可无需对掺钾光纤放大器进行硬件改造, 也即并未在掺钾光纤放大 器中增设前述的专用单元及目标光开关等新组件。
[83]图 4 -图 6提供了几种未进行硬件改造的掺钾光纤放大器的内部结构示意图。 发明人 在研究过程中发现, 不同型号的掺钾光纤放大器的内部结构存在差异。 为此, 可针对不 同型号的掺钾光纤放大器, 适应性地设定目标器件的选定方案。
[84]图 4提供了一种增益可调掺钾光纤放大器的示例性内部结构示意图。 参考图 4, 该 掺钾光纤放大器的传输链路上包含调光衰减器 VOA。 示例性地, 可将其传输链路上的 VOA 选定为 目标器件, 并将隔离状态作为 VOA的目标状态。 基于此, 针对该掺钾光纤 放大器, 将传输链路上的该调光衰减器调整至隔离状态后, 传输链路被分割为两部分, 经过分割后, 仍与输出端导通的链路部分(图 4中的虚线框部分) , 即成为输出单元。 可知, 输入光信号将在调光衰减器处被阻断。
[85]图 5提供了一种增益区间可调掺钾光纤放大器的一种示例性内部结构示意图。 参考 图 5 ,该掺钾光纤放大器的传输链路上包含调光衰减器 VOA ,还包含光开关。示例性地, 可将调光衰减器 VOA选定为目标器件,并将隔离状态作为 VOA的目标状态。基于此, 针对该掺钾光纤放大器, 将传输链路上的该调光衰减器调整至隔离状态后, 传输链路被 分割为两部分, 经过分割后, 仍与输出端导通的链路部分(图 5中的虚线框部分) , 即 构成输出单元。 可知, 输入光信号将在调光衰减器处被阻断。
[86]图 6提供了一种增益区间可调掺钾光纤放大器的另一种示例性内部结构示意图。 参 考图 6, 该掺钾光纤放大器的传输链路上包含光开关。 示例性地, 可将传输链路上的光 开关选定为目标器件,并将所选定的光开关切换至预设档位,以实现对传输链路的分割, 进而阻断输入光信号。 一种阻断方式可以是: 将光开关 1置于空档(也即是不会置于档 位 1也不会置于档位 2, 而是空挂) , 即可由光开关 1作为分割点而实现对传输链路的 分割, 光开关 2则可置于任一档位, 若置于档位 1 , 则将由掺钾光纤 1来生成输出光信 号; 若置于档位 2, 则将由掺钾光纤 2来生成输出光信号。 参考图 6, 另一种阻断方式 可以是: 将光开关 1和光开关 2的档位错开, 也即两者的档位要连接至两者之间的不同 掺钾光纤上, 以避免两者导通。 如图 6所示, 例如, 光开发 1可置于档位 1 , 光开关 2 则可置于档位 2, 这样, 将由掺钾光纤 2来生成输出光信号。
[87]以上几种掺钾光纤放大器的内部结构仅是示例性的, 在这些类型的内部结构中所采 用的目标器件选定方案也仅是示例性的, 本实施例并不限于此。 针对不同型号的掺钾光 纤放大器, 可在其内的控制组件中设置与其内部结构相适配的选定方案, 从而使得掺钾 光纤放大器内的控制组件可无障碍且合理地选用目标器件。
[88]可以理解的是, 在上述第二种情况下, 将在传输链路上选定的目标器件调整至目标 状态之后, 可实现对传输链路的分割, 进而可阻断输入光信号。 这种情况下, 分割后的 传输链路上, 仍与输出端导通的链路部分, 即成为输出单元。 值得说明的是, 通过合理 设计目标器件的选定方案, 即可保障分割后获得的输出单元能够包含有掺钾光纤且可使 用到泵浦激光器。
[89]据此, 该实现方式中, 可在传输链路上选用目标器件, 并将目标器件调整至目标状
态, 来通过目标器件阻断输入光信号。 其通过合理地选用目标器件, 可保障所隔离出的 输出单元能够具备产生输出光信号的能力。
[90]值得说明的是, 除了上述实现方式之外, 本实施例中还可采用其它实现方式以在掺 钾光纤放大器内的传输链路上阻断输入光信号。 例如, 可关闭传输链路上某段掺钾光纤
(例如, 第一段)上的泵浦功率, 以使该段掺钾光纤的输出无光。 这种方式下, 可通过 该段掺钾光纤来实现阻断输入光信号, 而该段掺钾光纤之后的链路部分, 即成为输出单 元。 在此不做更多实现方式的示例。
[91]在上述或下述实施例中, 在掺钾光纤放大器处于前述的新工作模式期间, 在监测到 故障已解除的情况下,可从新工作模式再切换回掺钾光纤放大器在监测到故障之前原本 所处的工作模式 (例如前文提及的 AGC模式) 。
[92]本实施例中, 从新工作模式再切换回掺钾光纤放大器在监测到故障之前原本所处的 工作模式的过程,可理解为将从原本的工作模式切换至新工作模式过程所实施的改变恢 复至原状。对此,本实施例中提出:若监测到所接收到的输入光信号不再符合故障标准, 则解除对输入光信号的 阻断; 将传输链路所需使用的泵浦激光器恢复至故障前的状态
(包括恢复泵浦功率等) , 以使掺钾光纤放大器恢复对输入光信号的放大处理。
[93]呼应于前文中提及的阻断输入光信号的可选实现方式, 这里, 可对传输链路上用于 阻断输入光信号的目标器件,进行状态恢复(即从前述的目标状态恢复至调整前的状态), 以解除对输入光信号的阻断。考虑到传输链路上所使用的部分泵浦激光器可能已在输出 单元中被调控, 因此, 这里还提出将传输链路所需使用的泵浦激光器恢复至故障前的状 态。 这样, 可实现掺钾光纤放大器内的传输链路恢复到监测到故障之前的状态, 因此, 可恢复监测到故障之前的工作能力, 也即恢复对输入光信号的放大处理。
[94]另外,正如前文提及的,工作模式的切换是由掺钾光纤放大器中的控制组件实施的, 因此,在从新工作模式再切换回掺钾光纤放大器在监测到故障之前原本所处的工作模式 时, 控制组件也可支持前述的 “解除对输入光信号的阻断” , 和 “将传输链路所需使用 的泵浦激光器恢复至故障前的状态” , 这两项操作同步完成, 从而避免两种工作模式之 间出现交叉影响,进而保障掺钾光纤放大器在进行工作模式切换时仍能维持稳定的输出 功率。
[95]需要说明的是, 在上述实施例及附图中的描述的一些流程中, 包含了按照特定顺序 出现的多个操作, 但是应该清楚了解, 这些操作可以不按照其在本文中出现的顺序来执 行或并行执行, 操作的序号如 101、 102等, 仅仅是用于区分开各个不同的操作, 序号 本身不代表任何的执行顺序。 另夕卜, 这些流程可以包括更多或更少的操作, 并且这些操 作可以按顺序执行或并行执行。 需要说明的是, 本文中的 “第一”、 “第二 ”等描述, 是用
于区分不同的档位、 工作方面或情况等, 不代表先后顺序, 也不限定 “第一 ”和 “第二 ”是 不同的类型。
[96]图 7为本公开另一示例性实施例提供的一种掺钾光纤放大器的结构示意图。 如图 7 所示, 该掺钾光纤放大器可包括: 控制组件 70和传输链路 80。
[97]其中, 控制组件 70用于执行一条或多条计算机程序指令, 以用于: 若监测到所接收 到的输入光信号符合故障标准, 则在所述掺钾光纤放大器内的传输链路 80上, 阻断所 述输入光信号, 以在所述掺钾光纤放大器内隔离出不受所述输入光信号影响的输出单元 90; 为掺钾光纤放大器, 确定期望输出功率; 在故障期间, 控制所述输出单元 90按照 所述期望输出功率, 生成输出光信号。
[98]在一可选实施例中,控制组件 70在所述掺钾光纤放大器内的传输链路上, 阻断所述 输入光信号时, 可具体用于: 将在所述传输链路 80上预先选定的目标器件, 调整至目 标状态, 以通过所述目标器件阻断所述输入光信号。
[99]在一可选实施例中,控制组件 70将在所述传输链路上预先选定的目标器件,调整至 目标状态时, 可具体用于: 若所述目标器件包括调光衰减器, 则控制所述调光衰减器切 换至隔离状态, 以阻断所述输入光信号; 若所述目标器件包括光开关, 则控制所述光开 关切换至预设档位, 以阻断所述输入光信号。
[100]在一可选实施例中, 所述掺钾光纤放大器中增设有专用单元, 所述传输链路 80上 增设有目标光开关, 作为所述目标器件; 所述目标光开关中包含用于导通所述传输链路 80的第一档位, 还包含用于将所述专用单元和所述传输链路 80中位于所述目标光开关 之后的链路部分进行导通的第二档位; 所述目标光开关切换至所述第二档位时, 所述专 用单元构成所述输出单元 90。
[101]在一可选实施例中, 若未在所述掺钾光纤放大器中增设新组件, 则在所述掺钾光 纤放大器中的所述目标器件调整至所述目标状态时, 所述传输链路 80上仍与输出端导 通的链路部分, 构成所述输出单元 90。
[102]在一可选实施例中, 控制组件 70在确定期望输出功率时, 可具体用于: 获取所述 掺钾光纤放大器在监测到故障之前的输出功率, 作为所述期望输出功率; 或者, 将预先 为所述输出单元所设定的输出功率, 作为所述期望输出功率; 或者, 基于预先为所述输 出单元所设定的功率谱密度, 计算出所述期望输出功率。
[103]在一可选实施例中, 所述输出单元 90中包含掺钾光纤 91 , 控制组件 70在控制所 述输出单元 90按照所述期望输出功率, 生成输出光信号时, 可具体用于: 调整向所述 输出单元 90内包含的掺钾光纤 91所施加的泵浦功率, 以使所述输出单元 90生成的输
出光信号符合所述期望输出功率。
[104]在一可选实施例中, 控制组件 70在调整向所述输出单元 90内包含的掺钾光纤 91 所施加的泵浦功率时, 可具体用于: 按照为所述输出单元 90所记录的泵浦设置参数, 向所述输出单元 90所使用的泵浦激光器 92发送控制指令, 以控制所述泵浦激光器调整 向所述输出单元内包含的掺钾光纤所施加的泵浦功率; 其中, 所述泵浦设置参数是基于 所述期望输出功率所计算出的。
[105]在一可选实施例中, 控制组件 70还可用于: 基于所述掺钾光纤放大器中的输出检 测器所检测到的输出功率与所述期望输出功率之间的差值, 对所述泵浦激光器 92进行 反馈调整, 直至所述输出检测器检测到所述输出单元 90生成的输出光信号符合所述期 望输出功率; 将反馈调整结束后所获得的泵浦设置参数, 记录为所述输出单元 90对应 的泵浦设置参数。
[106]在一可选实施例中, 控制组件 70还可用于: 若监测到所接收到的输入光信号不再 符合所述故障标准, 则解除对所述输入光信号的阻断; 将所述传输链路 80所需使用的 泵浦激光器恢复至故障前的泵浦功率, 以使所述掺钾光纤放大器恢复对所述输入光信号 的放大处理。
[107]在一可选实施例中,控制组件 70在解除对所述输入光信号的阻断时,可具体用于: 对所述传输链路 80上用于阻断所述输入光信号的目标器件, 从目标状态恢复至调整前 的状态, 以解除对所述输入光信号的阻断; 其中, 在监测到所接收到的输入光信号符合 故障标准后, 已将所述目标器件调整至所述目标状态, 以阻断所述输入光信号。
[108]在一可选实施例中, 所述解除对所述输入光信号的阻断, 和所述将所述传输链路 所需使用的泵浦激光器恢复至故障前的状态, 两项操作同步完成。
[109]进一步, 如图 7所示, 该掺钾光纤放大器的传输链路 80上还可包括: 调光衰减器 81、 光开关 82及掺钾光纤 83等其它器件。 图 7中仅示意性给出部分器件, 并不意味着 掺钾光纤放大器只包括图 7所示器件。
[110]值得说明的是, 上述关于掺钾光纤放大器各实施例中的技术细节, 可参考前述的 方法实施例中的相关描述, 为节省篇幅, 在此不再赘述, 但这不应造成本公开保护范围 的损失。
[111]图 8 为本公开一示例性实施例提供的一种控制装置的结构示意图。 该控制装置可 集成在掺钾光纤放大器的控制组件中, 该控制装置可包括: 模式切换模块 10,设置为若 监测到掺钾光纤放大器所接收到的输入光信号符合故障标准,则触发隔离模块 20; 隔离 模块 20,设置为在所述掺钾光纤放大器内的传输链路上, 阻断所述输入光信号, 以在所
述掺钾光纤放大器内隔离出不受所述输入光信号影响的输出单元;输出配置模块 30,设 置为, 为掺钾光纤放大器, 确定期望输出功率; 输出控制模块 40, 设置为在故障期间, 控制所述输出单元按照所述期望输出功率, 生成输出光信号。
[112]在一可选实施例中, 隔离模块 20可具体设置为: 将在所述传输链路上预先选定的 目标器件, 调整至目标状态, 以通过所述目标器件阻断所述输入光信号。
[113]在一可选实施例中,隔离模块 20可具体设置为:若所述目标器件包括调光衰减器, 则控制所述调光衰减器切换至隔离状态, 以阻断所述输入光信号; 若所述目标器件包括 光开关, 则控制所述光开关切换至预设档位, 以阻断所述输入光信号。
[114]在一可选实施例中, 所述掺钾光纤放大器中增设有专用单元, 所述传输链路上增 设有目标光开关, 作为所述目标器件; 所述目标光开关中包含用于导通所述传输链路的 第一档位,还包含用于将所述专用单元和所述传输链路中位于所述目标光开关之后的链 路部分进行导通的第二档位; 所述目标光开关切换至所述第二档位时, 所述专用单元构 成所述输出单元。
[115]在一可选实施例中, 若未在所述掺钾光纤放大器中增设新组件, 则所述掺钾光纤 放大器中的所述目标器件调整至所述目标状态时,所述传输链路上仍与输出端导通的链 路部分, 构成所述输出单元。
[116]在一可选实施例中, 输出配置模块 30可具体设置为: 获取所述掺钾光纤放大器在 监测到故障之前的输出功率, 作为所述期望输出功率; 或者, 将预先为所述输出单元所 设定的输出功率, 作为所述期望输出功率; 或者, 基于预先为所述输出单元所设定的功 率谱密度, 计算出所述期望输出功率。
[117]在一可选实施例中, 所述输出单元中包含掺钾光纤, 输出控制模块 40可具体设置 为: 调整向所述输出单元内包含的掺钾光纤所施加的泵浦功率, 以使所述输出单元生成 的输出光信号符合所述期望输出功率。
[118]在一可选实施例中, 输出控制模块 40可具体设置为: 按照为所述输出单元所记录 的泵浦设置参数, 向所述输出单元所使用的泵浦激光器发送控制指令, 以控制所述泵浦 激光器调整向所述输出单元内包含的掺钾光纤所施加的泵浦功率; 其中, 所述泵浦设置 参数是基于所述期望输出功率所计算出的。
[119]在一可选实施例中, 输出控制模块 40还可设置为: 基于所述掺钾光纤放大器中的 输出检测器所检测到的输出功率与所述期望输出功率之间的差值,对所述泵浦激光器进 行反馈调整, 直至所述输出检测器检测到所述输出单元生成的输出光信号符合所述期望 输出功率; 将反馈调整结束后所获得的泵浦设置参数, 记录为所述输出单元对应的泵浦
设置参数。
[120]在一可选实施例中, 模式切换模块 10还可设置为若监测到所接收到的输入光信号 不再符合所述故障标准, 则触发隔离模块 20解除对所述输入光信号的阻断; 输出控制 模块 40, 还可设置为将所述传输链路所需使用的泵浦激光器恢复至故障前的泵浦功率, 以使所述掺钾光纤放大器恢复对所述输入光信号的放大处理。
[121]在一可选实施例中, 隔离模块 20在解除对所述输入光信号的阻断的过程中, 可设 置为: 对所述传输链路上用于阻断所述输入光信号的目标器件, 从目标状态恢复至调整 前的状态, 以解除对所述输入光信号的阻断; 其中, 在监测到所接收到的输入光信号符 合故障标准后, 已将所述目标器件调整至所述目标状态, 以阻断所述输入光信号。
[122]在一可选实施例中, 所述解除对所述输入光信号的阻断, 和所述将所述传输链路 所需使用的泵浦激光器恢复至故障前的状态, 两项操作同步完成。
[123]相应地, 本公开实施例还提供一种存储有计算机程序的计算机可读存储介质, 计 算机程序被执行时能够实现上述方法实施例中的各步骤。
[124]相应地, 本公开实施例还提供一种计算机程序产品, 其所包含的计算机程序被执 行时能够实现上述方法实施例中的各步骤。
[125]本领域内的技术人员应明白, 本公开的实施例可提供为方法、 系统、 或计算机程 序产品。 因此, 本公开可采用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方 面的实施例的形式。 而且, 本公开可采用在一个或多个其中包含有计算机可用程序代码 的计算机可用存储介质 (包括但不限于磁盘存储器、 CD-ROM. 光学存储器等)上实施 的计算机程序产品的形式。
[126]本公开是参照根据本公开实施例的方法、 设备(系统) 、 和计算机程序产品的流 程图和 /或方框图来描述的。应理解可由计算机程序指令实现流程图和 /或方框图中的 每一流程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这 些计算机程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设 备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行 的指令产生用于实现在 流程图一个流程或多个流程和 /或方框图一个方框或多个方框 中指定的功能的装置。
[127]这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定 方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指 令装置的制造品,该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框 或多个方框中指定的功能。
[128]这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计 算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机 或其他可编程设备上执行 的指令提供用于实现在流程图一个流程或多个流程和 /或方 框图一个方框或多个方框中指定的功能的步骤。
[129]还需要说明的是, 术语 “包括”、 “包含 ”或者其任何其他变体意在涵盖非排他性的包 含, 从而使得包括一系列要素的过程、 方法、 商品或者设备不仅包括那些要素, 而且还 包括没有明确列出的其他要素, 或者是还包括为这种过程、 方法、 商品或者设备所固有 的要素。 在没有更多限制的情况下, 由语句 “包括一个 ..... ”限定的要素, 并不排除在包 括所述要素的过程、 方法、 商品或者设备中还存在另外的相同要素。
[130]以上所述仅为本公开的实施例而已, 并不用于限制本公开。 对于本领域技术人员 来说, 本公开可以有各种更改和变化。 凡在本公开的精神和原理之内所作的任何修改、 等同替换、 改进等, 均应包含在本公开的保护范围之内。
Claims
1、 一种光传输放大方法, 适用于掺钾光纤放大器, 所述方法包括: 若监测到所接收到 的输入光信号符合故障标准,则在所述掺钾光纤放大器内的传输 链路上, 阻断所述输入光信号, 以在所述掺钾光纤放大器内隔离出不受所述输入光信号 影响的输出单元; 为所述掺钾光纤放 大器, 确定期望输出功率; 在故障期 间, 控制所述输出单元按照所述期望输出功率, 生成输出光信号。
2、 根据权利要求 1 所述的方法, 其中, 在所述掺钾光纤放大器内的传输链路上, 阻断所述输入光信号, 包括: 将在所述传输链路上预先选定 的目标器件, 调整至目标状态, 以通过所述目标器件 阻断所述输入光信号。
3、根据权利要求 2所述的方法,其中,将在所述传输链路上预先选定的目标器件, 调整至目标状态, 包括: 若所述 目标器件包括调光衰减器, 则控制所述调光衰减器切换至隔离状态, 以阻断 所述输入光信号; 若所述 目标器件包括光开关, 则控制所述光开关切换至预设档位, 以阻断所述输入 光信号。
4、 根据权利要求 2或 3所述的方法, 其中, 所述掺钾光纤放大器中增设有专用单 元, 所述传输链路上增设有目标光开关, 作为所述目标器件; 所述目标光开关中包含用 于导通所述传输链路的第一档位,还包含用于将所述专用单元和所述传输链路中位于所 述目标光开关之后的链路部分进行导通的第二档位; 所述目标光开关切换至所述第二档 位时, 所述专用单元构成所述输出单元。
5、根据权利要求 4所述的方法,其中,若未在所述掺钾光纤放大器中增设新组件, 则所述掺钾光纤放大器中的所述目标器件调整至所述目标状态时,所述传输链路上仍与 输出端导通的链路部分, 构成所述输出单元。
6、 根据权利要求 1所述的方法, 其中, 确定期望输出功率, 包括: 获取所 述掺钾光纤放大器在监测到故障之前的输出功率, 作为所述期望输出功率; 或者, 将预先为所述输 出单元所设定的输出功率, 作为所述期望输出功率; 或者, 基于预先为所述输 出单元所设定的功率谱密度, 计算出所述期望输出功率。
7、 根据权利要求 1 所述的方法, 其中, 所述输出单元中包含掺钾光纤, 控制所述 输出单元按照所述期望输出功率, 生成输出光信号, 包括: 调整 向所述输出单元内包含的掺钾光纤所施加的泵浦功率, 以使所述输出单元生成
的输出光信号符合所述期望输出功率。
8、 根据权利要求 7所述的方法, 其中, 调整向所述输出单元内包含的掺钾光纤所 施加的泵浦功率, 包括: 按照为所述输 出单元所记录的泵浦设置参数, 向所述输出单元所使用的泵浦激光器 发送控制指令, 以控制所述泵浦激光器调整向所述输出单元内包含的掺钾光纤所施加的 泵浦功率; 其 中, 所述泵浦设置参数是基于所述期望输出功率所计算出的。
9、 根据权利要求 8所述的方法, 还包括: 基 于所述掺钾光纤放大器中的输出检测器所检测到的输 出功率与所述期望输出功 率之间的差值, 对所述泵浦激光器进行反馈调整, 直至所述输出检测器检测到所述输出 单元生成的输出光信号符合所述期望输出功率; 将反馈调整结束后所获得 的泵浦设置参数,记录为所述输出单元对应的泵浦设置参 数。
10、 根据权利要求 1所述的方法, 还包括: 若监测到所接收到 的输入光信号不再符合所述故障标准,则解除对所述输入光信号 的阻断; 将所述传输链路所需使用 的泵浦激光器恢复至故障前的泵浦功率, 以使所述掺钾光 纤放大器恢复对所述输入光信号的放大处理。
11、 根据权利要求 10所述的方法, 其中, 解除对所述输入光信号的阻断, 包括: 将所述传输链路上用于 阻断所述输入光信号的目标器件,从目标状态恢复至调整前 的状态, 以解除对所述输入光信号的阻断; 其 中, 在监测到所接收到的输入光信号符合故障标准后, 已将所述目标器件调整至 所述目标状态, 以阻断所述输入光信号。
12、 根据权利要求 10所述的方法, 其中, 所述解除对所述输入光信号的阻断, 和 所述将所述传输链路所需使用的泵浦激光器恢复至故障前的状态 , 两项操作同步完成。
13、 一种掺钾光纤放大器, 包含控制组件和传输链路, 其中, 所述控制组件用于执 行一条或多条计算机指令, 以用于执行权利要求 1-12任一项所述的光传输放大方法。
14、 一种存储计算机程序的计算机可读存储介质, 其中, 当所述计算机程序被一个 或多个处理器执行时, 致使所述一个或多个处理器执行权利要求 1-12任一项所述的光 传输放大方法。
15、 一种计算机程序产品, 包括计算机程序, 其中, 当所述计算机程序被一个或多 个处理器执行时, 致使所述一个或多个处理器执行权利要求 1-12任一项所述光传输放 大方法。
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| CN1236897A (zh) * | 1998-05-18 | 1999-12-01 | 日本电气株式会社 | 光学开关和光学网络 |
| US20040109227A1 (en) * | 2002-12-07 | 2004-06-10 | Hong-Seok Shin | Optical fiber amplifier having automatic power control function and automatic power control method |
| CN201830265U (zh) * | 2010-09-21 | 2011-05-11 | 上海大学 | 一种实现主/备光路智能切换的光放大器 |
| CN102742199A (zh) * | 2012-02-23 | 2012-10-17 | 华为海洋网络有限公司 | 光分插复用器分支单元及其控制方法 |
| CN104904140B (zh) * | 2013-12-25 | 2017-04-19 | 华为海洋网络有限公司 | 一种光分插复用光分支器 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1236897A (zh) * | 1998-05-18 | 1999-12-01 | 日本电气株式会社 | 光学开关和光学网络 |
| US20040109227A1 (en) * | 2002-12-07 | 2004-06-10 | Hong-Seok Shin | Optical fiber amplifier having automatic power control function and automatic power control method |
| CN201830265U (zh) * | 2010-09-21 | 2011-05-11 | 上海大学 | 一种实现主/备光路智能切换的光放大器 |
| CN102742199A (zh) * | 2012-02-23 | 2012-10-17 | 华为海洋网络有限公司 | 光分插复用器分支单元及其控制方法 |
| CN104904140B (zh) * | 2013-12-25 | 2017-04-19 | 华为海洋网络有限公司 | 一种光分插复用光分支器 |
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