WO2014201607A1 - Procédé et dispositif d'émission de signal optique, et émetteur optique - Google Patents

Procédé et dispositif d'émission de signal optique, et émetteur optique Download PDF

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Publication number
WO2014201607A1
WO2014201607A1 PCT/CN2013/077326 CN2013077326W WO2014201607A1 WO 2014201607 A1 WO2014201607 A1 WO 2014201607A1 CN 2013077326 W CN2013077326 W CN 2013077326W WO 2014201607 A1 WO2014201607 A1 WO 2014201607A1
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WO
WIPO (PCT)
Prior art keywords
carrier
optical signal
power
carriers
adjustment coefficient
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PCT/CN2013/077326
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English (en)
Chinese (zh)
Inventor
王轲
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380002344.XA priority Critical patent/CN103782531B/zh
Priority to PCT/CN2013/077326 priority patent/WO2014201607A1/fr
Publication of WO2014201607A1 publication Critical patent/WO2014201607A1/fr

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Classifications

    • 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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/506—Multiwavelength transmitters
    • 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
    • H04B10/50—Transmitters
    • H04B10/564—Power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems

Definitions

  • the present invention relates to communication technologies, and in particular, to an optical signal transmission method, apparatus, and optical transmitter. Background technique
  • an optical transmitter of a transmission system above 100 G uses photonic integration technology to integrate a laser array and a modulator array.
  • the demultiplexing device Demux is used to demultiplex the carrier into multiple independent wavelength optical signals for modulation.
  • the output of the modulator is coupled by the wavelength division multiplexer Mux to obtain a light.
  • the signal is transmitted through the fiber.
  • an optical amplifier is required to amplify the optical signal at a certain distance.
  • the cascade connection of multiple optical amplifiers causes the optical signal gain to be uneven. Pump lasers or Raman amplifiers are currently used to balance the loss of optical signals in the transmission link.
  • Embodiments of the present invention provide an optical signal transmission method, apparatus, and optical transmitter to adaptively ensure flatness of optical signal gain in a transmission link.
  • an embodiment of the present invention provides an optical signal transmission method, including:
  • the modulator Obtaining, by the modulator, the power of the first optical signal corresponding to each carrier after modulating the at least one carrier; the amplification gain transmitted by the first optical signal corresponding to the output of the at least one carrier after combining and the wavelength of the carrier, Determining a corresponding power adjustment coefficient of the first optical signal; Determining a power adjustment coefficient of the first optical signal, and adjusting a power of the corresponding first optical signal in the modulator.
  • the first optical signal outputted according to the at least one carrier is combined with an amplification gain transmitted after combining and a wavelength of the carrier, and the corresponding first light is determined.
  • the power adjustment factor of the signal including:
  • An initial adjustment coefficient of the optical signal is a gain value corresponding to a wavelength of each of the carriers, and G is a gain average of the at least one carrier.
  • the first optical signal corresponding to the output of the at least one carrier is combined with an amplification gain transmitted after the combining and a wavelength of the carrier, and the corresponding first light is determined.
  • the power adjustment factor of the signal it also includes:
  • the power adjustment coefficient of the corresponding first optical signal is updated according to a modulation pattern and a modulation order corresponding to each carrier before modulation.
  • the updating the power adjustment coefficient of the corresponding first optical signal according to the modulation pattern and the modulation order corresponding to each carrier before the modulation includes:
  • the power adjustment coefficients of the signals are multiplied, and the power adjustment coefficients of the corresponding first optical signals are updated.
  • the preset error rate according to the high-order orthogonal amplitude modulation and the transmit power corresponding to the carrier including: acquiring each of the carriers according to SE? Corresponding launch
  • BER is a preset error rate in the high-order quadrature amplitude modulation
  • M w is the The modulation order of the carrier, er/c ⁇ ⁇ J ' t , N.
  • R sN is the symbol rate of the carrier.
  • the first optical signal outputted according to the at least one carrier is combined with an amplification gain transmitted after combining and a wavelength of the carrier, and the corresponding first light is determined.
  • the power adjustment factor of the signal it also includes:
  • the power adjustment coefficient of the corresponding first optical signal is updated according to the power of each of the carriers before modulation, the power of the corresponding first signal, and the frequency of the at least one carrier.
  • the power of each of the carriers before the modulation, the power of the corresponding first signal, and the The frequency of the at least one carrier is updated, and the power adjustment coefficient of the corresponding first optical signal is updated, including:
  • I is the initial adjustment coefficient of the first optical signal
  • P1 is the first The power of the signal
  • P2 is the power of each of the carriers before modulation
  • an embodiment of the present invention provides an optical signal transmission apparatus, including:
  • a detection module configured to obtain a power of a first optical signal that is output by each of the carriers after the modulation of the at least one carrier by the modulator; and an adjustment module, configured to: after the first optical signal corresponding to the output of the at least one carrier is combined Amplifying gain of the transmission and a wavelength of the carrier, determining a power adjustment coefficient of the corresponding first optical signal; and corresponding to the first optical signal in the modulator according to a power adjustment coefficient of the first optical signal The power is adjusted.
  • the adjusting module is specifically configured to:
  • An initial adjustment coefficient of the optical signal ( ⁇ is a gain value corresponding to a wavelength of each of the carriers, and G is a gain average of the at least one carrier.
  • the adjusting module is further configured to:
  • the power adjustment coefficient of the corresponding first optical signal is updated according to a modulation pattern and a modulation order corresponding to each carrier before modulation.
  • the adjusting module is specifically configured to:
  • the power adjustment coefficients of the signals are multiplied, and the power adjustment coefficients of the corresponding first optical signals are updated.
  • the second square module is specifically configured to: acquire, according to SE?, a corresponding transmission of each of the carriers
  • the power year P sN where BER is a preset error rate in the high-order quadrature amplitude modulation, and M w is a modulation order of the carrier, erfc ⁇ ⁇ dt , N .
  • R sN is the symbol rate of the carrier.
  • the detection module is further configured to:
  • the adjustment module is further configured to:
  • the adjusting module is further configured to:
  • the nonlinear correction edge of the carrier corresponding to f ijk F I - ;
  • the nonlinear correction coefficient F / + ⁇ of the carrier corresponding to j ⁇ , or /; where I is the initial adjustment coefficient of the first optical signal, P1 is the power of the first signal, and P2 is the carrier before the modulation Power
  • an optical transmitter including:
  • the modulator is configured to: after modulating at least one carrier, each carrier correspondingly outputs a first optical signal; acquiring power of the first optical signal; according to the at least one carrier Corresponding to the power gain adjustment coefficient of the corresponding first optical signal, corresponding to the power gain adjustment coefficient of the first optical signal, corresponding to the power gain adjustment coefficient of the first optical signal The power of the first optical signal is adjusted.
  • the modulator is specifically configured to:
  • An initial adjustment coefficient of the optical signal is a gain value corresponding to a wavelength of each of the carriers, and G is a gain average of the at least one carrier.
  • the modulator is further configured to:
  • the power adjustment coefficient of the corresponding first optical signal is updated according to a modulation pattern and a modulation order corresponding to each carrier before the adjustment.
  • the modulator is specifically configured to:
  • the power adjustment coefficients of the signals are multiplied, and the power adjustment coefficients of the corresponding first optical signals are updated.
  • the modulator is specifically configured to: Acquiring the transmission corresponding to each of the carriers according to SE ?
  • BER is a preset error rate in the high-order quadrature amplitude modulation
  • M w is a modulation order of the carrier, erfc ⁇ dt, N.
  • R sN is the symbol rate of the carrier.
  • the modulator is further configured to:
  • the modulator is further configured to:
  • the optical signal transmission method, device and optical transmitter provided by the embodiments of the present invention adjust the power of each carrier optical signal outputted by the modulation in the modulator according to the amplification gain of the optical signal in the transmission link and the carrier wavelength, thereby
  • the gain of the optical signal in the transmission link is adaptively ensured; the use of the pump laser or the optical amplifier in the optical signal transmission system can be reduced or even avoided, and the OSNR cost in the optical signal transmission process is reduced.
  • FIG. 1 is a flowchart of an optical signal transmission method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of another optical signal transmission method according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of still another optical signal transmission method according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of an optical signal transmission apparatus according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of an optical transmitter according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of an optical signal transmission method according to an embodiment of the present invention.
  • an optical signal transmission apparatus provided by an optical signal transmission apparatus is used as an execution body to describe an optical signal transmission method provided by the embodiment. It is an optical transmitter.
  • the optical signal transmission method of this embodiment may include:
  • the optical transmitter uses a multi-carrier technique to decompose the carrier to obtain at least one carrier. After the at least one carrier is input to the modulator, each carrier is modulated to obtain a first optical signal.
  • the optical signal transmission device can detect the power of the first optical signal of the modulator in a feedback manner.
  • the optical signal transmission device can obtain the amplification gain of the coupled carrier in the fiber link, and the respective wavelengths of the carriers before coupling. Thereby, the power adjustment coefficient of the first optical signal carried by each carrier is determined according to the amplification gain and the wavelength of each carrier.
  • the optical signal transmission method provided in this embodiment adjusts the power of the optical signals of the modulated signals output in the modulator according to the amplification gain of the optical signal in the transmission link and the carrier wavelength, thereby adaptively ensuring the transmission chain.
  • the gain of the optical signal in the road is flat; the use of the pump laser or optical amplifier in the optical signal transmission system can be reduced or even avoided, and the optical signal to noise ratio (hereinafter referred to as Optical Signal To Noise Ratio) is reduced. OSNR) cost.
  • determining, according to the amplification gain of the first optical signal corresponding to the at least one carrier, and the wavelength of the carrier, determining a power adjustment coefficient of the corresponding first optical signal including: acquiring each carrier according to the amplification gain a gain value corresponding to the wavelength; determining a gain average value of the at least one carrier according to the gain value corresponding to the wavelength of each carrier (if the number of carriers is one, the gain average is the gain value corresponding to the carrier wavelength); Determining the power adjustment factor of the first optical signal
  • the gain value corresponding to the wavelength, and G is the gain average of at least one carrier.
  • the gain average value set to the four carriers may also be set as the average of the transmission powers of the four carriers.
  • the method for acquiring the power adjustment coefficient of the first optical signal corresponding to the other carriers is similar.
  • 2 is a flowchart of another optical signal transmission method according to an embodiment of the present invention. As shown in FIG. 2, an optical signal transmission method provided by the embodiment is described by using an optical signal transmission apparatus as an execution body, and an optical signal transmission apparatus is provided. It can be an optical transmitter. The optical signal transmission method of this embodiment may be further included on the basis of S110 to S130 of the embodiment shown in FIG.
  • a high-order Quadrature Amplitude Modulation (QAM) modulation pattern is used to modulate each carrier before modulation, and the modulation order is ⁇ . Then, the power adjustment coefficients of the first optical signals of the respective carriers can be updated according to the characteristics of the modulation pattern and the modulation order ⁇ corresponding to each carrier.
  • QAM Quadrature Amplitude Modulation
  • updating the power adjustment coefficient of the corresponding first optical signal according to a modulation pattern and a modulation order corresponding to each carrier before the modulation including: according to a preset error rate in the high-order quadrature amplitude modulation and The modulation order of the carrier acquires the transmit power corresponding to each carrier, and obtains the average transmit power of at least one carrier (if the number of carriers is one, the average transmit power is the transmit power of the carrier itself); The ratio of the corresponding transmit power to the average transmit power of the carriers is multiplied by the power adjustment coefficient of the corresponding first optical signal, and the power adjustment coefficient of the corresponding first optical signal is updated.
  • the modulation pre-modulation carrier is modulated by using a modulation pattern of mQAM (m-order quadrature amplitude modulation), and when a single carrier needs to reach a predetermined error rate, the modulation order of the carrier is used. M and its transmit power need to meet certain requirements. Under the known bit error rate and modulation order M, the transmit power P sjV of the carrier can be known. Still, the four carriers are not modulated, and the transmission powers of the four carriers, P s2 , and P s4 are respectively obtained, and then the power modulation coefficients of the first optical signals corresponding to the first carrier of the four carriers can be updated to:
  • mQAM m-order quadrature amplitude modulation
  • the method for updating the power adjustment coefficient of the first optical signal corresponding to the other carriers is similar, and the power adjustment coefficient of the corresponding first optical signal can be updated to:
  • A I x , where is the average transmit power of at least two carriers
  • Obtaining the transmit power corresponding to each carrier including:
  • BER is the preset error rate in high-order quadrature amplitude modulation
  • M w is the modulation order of the carrier, erfc(z), N.
  • the spectral density of Gaussian white noise is the symbol rate of the carrier.
  • the relationship between the transmit power ⁇ is specifically: BER «
  • the optical signal transmission method provided in this embodiment adjusts the power of the optical signals of the modulated signals output in the modulator according to the amplification gain of the optical signal in the transmission link and the carrier wavelength, thereby adaptively ensuring the transmission chain.
  • the gain of the optical signal in the road is flat; the power between the carriers is also equalized according to the modulation pattern of each carrier; the use of the pump laser or optical amplifier in the optical signal transmission system can be reduced or even avoided, and the optical signal is reduced OSNR penalty during transmission.
  • FIG. 3 is a flowchart of still another method for transmitting an optical signal according to an embodiment of the present invention.
  • an optical signal transmission method provided by the embodiment is described by using an optical signal transmission apparatus as an execution body, and an optical signal transmission apparatus is provided. It can be an optical transmitter.
  • the optical signal transmission method of the present embodiment may further include: S110 to S130 of the embodiment shown in FIG. 1, or S110 to S240 of the embodiment shown in FIG. 2, which may further include:
  • the initial adjustment coefficient, P1 is the power of the first signal, and P2 is the power of each carrier before the modulation; the nonlinear correction coefficient corresponding to each carrier is multiplied by the power adjustment coefficient of the corresponding first optical signal, corresponding to The power adjustment coefficient of the first optical signal is updated.
  • the power transferred by the carriers of frequencies ⁇ , f, and ⁇ , respectively, is quantized, that is: ⁇
  • the power modulation factor of the first optical signal corresponding to the carrier can be updated to:
  • the optical signal transmission method provided in this embodiment adjusts the power of the optical signals of the modulated signals output in the modulator according to the amplification gain of the optical signal in the transmission link and the carrier wavelength, thereby adaptively ensuring the transmission chain.
  • the gain of the optical signal in the path is flat; and the power between the carriers is equalized according to the modulation pattern of each carrier; and the power of the optical signal of each carrier output after modulation is further performed in the adjuster according to the frequency of each carrier. Adjustment, to reduce the impact of nonlinear effects on optical signal transmission; can reduce or even avoid the use of pump lasers or optical amplifiers in optical signal transmission systems, reducing the OSNR cost of optical signal transmission.
  • the optical signal transmission method provided by the embodiment of the present invention does not need to re-plan the optical signal transmission system, when the modulation mode of the optical transmitter, the number of carriers, the optical amplifier in the transmission link, and the wavelength of the carrier are changed.
  • the power of the optical signal transmitted by the optical transmitter can be adaptively adjusted.
  • the power adjustment coefficient of the first optical signal Get and update you can use matrix operations. For example, still modulate four carriers as an example:
  • Step 3 Determine a first power adjustment coefficient update matrix of the first optical signal: p p p p
  • ⁇ , ⁇ 2 , and ⁇ are the transmit powers of the four carriers, respectively.
  • PI is the power of the first signal
  • P2 is the power of the pre-modulation carrier.
  • the power adjustment coefficient matrix for adjusting the power of the first optical signal corresponding to the four carriers may be a product of a matrix I and 4v, or a product of a matrix I, 4v and three, or The product of the matrix I, 4v, ⁇ and the three is used.
  • the power of the first optical signal of the four carriers is adjusted by multiplying the power adjustment coefficient matrix by the power matrix of the first optical signal of four carriers: [ ⁇ , ⁇ 2 , 3 ⁇ 4, 3 ⁇ 4].
  • the implementation of the present invention can be applied to a Wavelength Division Multiplexing (WDM) high-speed transmission system of over 100G.
  • WDM Wavelength Division Multiplexing
  • an adjustable attenuator is used to adjust the power of the optical signals of each channel before entering the wavelength division multiplexer according to the feedback signal.
  • the feedback signal is usually obtained based on the signal to noise ratio of the channel.
  • the channel optical power with higher signal to noise ratio is reduced, and the optical power of the channel with lower signal to noise is improved.
  • the power budget is relatively tight.
  • the power requirement of the optical signal entering the optical modulator is above 10 dBm, and the optical signal power entering the transmission link from the optical modulator needs to be Above 3dBm, if adding an adjustable attenuator in the system will reduce the optical power of the modulator output optical signal, the optical power entering the link will be difficult to reach more than 3dBm.
  • the optical power of the optical signals of each carrier output after modulation is pre-emphasized in the modulator, thereby ensuring that the total optical power of the optical signal in a single optical fiber is not For example, the total power of the carrier before modulation is 6 dBm, and the total power of the optical signal is still kept 6 dBm after modulation.
  • FIG. 4 is a schematic structural diagram of an optical signal transmission apparatus according to an embodiment of the present invention.
  • the optical signal transmission apparatus 400 provided in this embodiment may include:
  • the detecting module 410 is configured to obtain power of the first optical signal corresponding to each carrier after the modulator modulates the at least one carrier.
  • the adjusting module 420 is configured to determine, according to the amplification gain of the first optical signal corresponding to the output of the at least one carrier, and the wavelength of the carrier, determine a power adjustment coefficient of the corresponding first optical signal, and adjust the power according to the power of the first optical signal. Coefficient, the power of the corresponding first optical signal is adjusted in the modulator.
  • the optical signal transmission device 400 provided in this embodiment may be used to perform the technical solution of the method embodiment shown in any one of FIG. 1 to FIG. 3, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the adjusting module 420 is specifically configured to: obtain a gain value corresponding to a wavelength of each carrier according to the amplification gain; determine a gain average value of the at least one carrier according to the gain value corresponding to the wavelength of each carrier; wherein:
  • the initial adjustment coefficient of the first optical signal is a gain value corresponding to the wavelength of each carrier, and G is a gain average of at least one carrier. Further, the adjusting module 420 is further configured to: update a power adjustment coefficient of the corresponding first optical signal according to a modulation pattern and a modulation order corresponding to each carrier before the modulation.
  • the adjusting module 420 is specifically configured to: obtain a transmit power corresponding to each carrier according to a preset error rate in the high-order quadrature amplitude modulation and a modulation order of the carrier, and acquire an average transmit power of the at least one carrier; Using the ratio of the corresponding transmit power to the average transmit power of each carrier The power adjustment coefficients of the corresponding first optical signals are multiplied, and the power adjustment coefficients of the corresponding first optical signals are updated.
  • the adjustment module 420 is used for:
  • BER is the preset error rate in high-order quadrature amplitude modulation
  • M w is the modulation order of the carrier, erfc(z), N.
  • the spectral density of Gaussian white noise is the symbol rate of the carrier.
  • the detecting module 410 is further configured to: obtain power of each carrier before the modulation; correspondingly, the adjusting module 420 is further configured to: according to the power of the second signal, the power of the corresponding first signal, and the frequency of the at least one carrier, The power adjustment coefficient of the corresponding first optical signal is updated.
  • the power is the power of each of the carriers before modulation; multiplying the nonlinear correction coefficient corresponding to each carrier by the power adjustment coefficient of the corresponding first optical signal, and performing power adjustment coefficients of the corresponding first optical signal Update.
  • the optical signal transmission device 400 provided in this embodiment may be used to implement the technical solution of the foregoing method embodiments, and the implementation principle and technical effects thereof are similar, and details are not described herein again.
  • FIG. 5 is a schematic structural diagram of an optical transmitter according to an embodiment of the present invention.
  • the optical transmitter 500 provided in this embodiment may include:
  • the splitter 510 may be, for example, a demultiplexing multiplexer Demux, and the combiner 520 may be, for example, a wavelength division multiplexer Mux.
  • the modulator 530 is configured to: after modulating the at least one carrier, each carrier correspondingly outputs the first optical signal; acquiring power of the first optical signal; and obtaining, by the at least one carrier, the amplification gain of the first optical signal after being combined And the wavelength of the carrier, determining the power adjustment system of the corresponding first optical signal The power of the corresponding first optical signal is adjusted according to the power adjustment coefficient of the first optical signal.
  • the optical transmitter 500 provided in this embodiment may be used to implement the technical solution of the method embodiment shown in any one of FIG. 1 to FIG. 3, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the modulator 530 is specifically configured to: obtain a gain value corresponding to a wavelength of each carrier according to the amplification gain; determine a gain average value of the at least one carrier according to the gain value corresponding to the wavelength of each carrier; and determine the first optical signal Power adjustment factor where: I is the first
  • the initial adjustment coefficient of an optical signal is a gain value corresponding to the wavelength of each carrier, and G is a gain average of at least one carrier.
  • the modulator 530 is further configured to: update the power adjustment coefficient of the corresponding first optical signal according to a modulation pattern and a modulation order corresponding to each carrier before the adjustment.
  • the modulator 530 is specifically configured to: obtain a transmit power corresponding to each carrier according to a preset error rate in the high-order quadrature amplitude modulation and a modulation order of the carrier, and acquire an average transmit power of the at least one carrier; The ratio of the corresponding transmit power to the average transmit power of each carrier is multiplied by the power adjustment coefficient of the corresponding first optical signal, and the power adjustment coefficient of the corresponding first optical signal is updated.
  • modulator 530 is specifically adapted to:
  • BER is the preset error rate in high-order quadrature amplitude modulation
  • M w is the modulation order of the carrier, erfc(z), N.
  • the spectral density of Gaussian white noise is the symbol rate of the carrier.
  • the modulator 530 is further configured to: acquire power of each carrier before modulation; and adjust power of the corresponding first optical signal according to power of the second signal, power of the corresponding first signal, and frequency of the at least one carrier The coefficients are updated.
  • the nonlinear correction coefficient of the carrier corresponding to f yk F / - ⁇ ; the non-linear repair of the corresponding carrier of j ⁇ , /. or / Positive coefficient F where I is the initial adjustment coefficient of the first optical signal, and P1 is the first signal
  • the power is the power of each of the carriers before modulation; multiplying the nonlinear correction coefficient corresponding to each carrier by the power adjustment coefficient of the corresponding first optical signal, and performing power adjustment coefficients of the corresponding first optical signal Update.
  • the optical transmitter 500 provided in this embodiment may be used to implement the technical solution of the method embodiment shown in any one of FIG. 1 to FIG. 3, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the optical signal transmission method, apparatus, and optical transmitter provided by the embodiments of the present invention adjust the power of each carrier according to the amplification gain of the optical signal in the transmission link and the carrier wavelength, thereby adaptively ensuring transmission.
  • the gain of the optical signal in the link is flat; and the power between the carriers is equalized according to the modulation pattern of each carrier; and the power of the first optical signal is further adjusted according to the frequency of each carrier to reduce the nonlinear effect pair
  • the effect of optical signal transmission can reduce or even avoid the use of pump lasers or optical amplifiers in optical signal transmission systems, reducing the OSNR cost in optical signal transmission.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

La présente invention concerne un procédé et un dispositif d'émission de signal optique ainsi qu'un émetteur optique. Le procédé d'émission de signal optique consiste à : acquérir une puissance d'un premier signal optique sorti de manière correspondante par chaque porteuse après qu'un modulateur module au moins une porteuse; selon le gain d'amplification émis après la combinaison du premier signal optique, qui est sorti de manière correspondante par au moins une porteuse, et de la longueur d'onde de la porteuse, déterminer un coefficient de réglage de puissance d'un premier signal optique correspondant; et selon le coefficient de réglage de puissance du premier signal optique, régler la puissance du premier signal optique correspondant dans un modulateur. Le procédé et le dispositif d'émission de signal optique ainsi que l'émetteur optique peuvent régler la puissance de chaque porteuse selon le gain d'amplification d'un signal optique et selon la longueur d'onde d'une porteuse dans une liaison d'émission, afin de garantir de manière adaptative la régularité du gain du signal optique dans la liaison d'émission. D'autre part, l'utilisation d'un laser à pompe ou d'un amplificateur optique et de dispositifs similaires dans un système d'émission de signaux optiques peut être réduite et même évitée, ce qui réduit le coût du rapport OSNR d'un processus d'émission de signaux optiques.
PCT/CN2013/077326 2013-06-17 2013-06-17 Procédé et dispositif d'émission de signal optique, et émetteur optique WO2014201607A1 (fr)

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CN201380002344.XA CN103782531B (zh) 2013-06-17 2013-06-17 光信号传输方法、装置及光发射机
PCT/CN2013/077326 WO2014201607A1 (fr) 2013-06-17 2013-06-17 Procédé et dispositif d'émission de signal optique, et émetteur optique

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CN106465287B (zh) * 2014-06-26 2019-12-06 华为技术有限公司 调制格式和载波功率的确定及调整方法、设备和系统
CN106330336A (zh) * 2015-06-16 2017-01-11 中兴通讯股份有限公司 一种调节调制器输出光信号功率平衡的装置及方法
CN106341356B (zh) * 2015-07-10 2020-01-21 中兴通讯股份有限公司 下行载波平坦度补偿方法及装置
CN110278050B (zh) * 2018-03-13 2022-01-07 中兴通讯股份有限公司 一种超100g wdm传输系统反馈调优的方法及装置
CN110417479B (zh) * 2018-04-28 2021-02-23 华为技术有限公司 一种用于功率调整的方法及装置
CN110269636A (zh) * 2019-07-22 2019-09-24 河南省中医院（河南中医药大学第二附属医院） 放射科用立体式成像检查装置
CN112217596A (zh) * 2020-09-23 2021-01-12 武汉光迅科技股份有限公司 参数调整方法、装置、电子设备和存储介质

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