WO2019116240A2

WO2019116240A2 - Control device and method for optimising transmission performance of optical communication system

Info

Publication number: WO2019116240A2
Application number: PCT/IB2018/059900
Authority: WO
Inventors: 蔡坤廷; 陈威宏; 庄荣敏
Original assignee: 光联通讯技术有限公司美国分部
Priority date: 2017-12-12
Filing date: 2018-12-12
Publication date: 2019-06-20
Also published as: CN109921849B; WO2019116240A3; CN109921849A

Abstract

A control device for optimising the transmission performance of an optical communication system, said control device including an optical detection unit, a comparison unit and a control unit. The optical detection unit is used for adjusting an optical feedback signal from the optical communication system according to a set signal output, so as to generate first and second measurement signals respectively related to one of a bit error rate, a Q factor and a signal-to-noise ratio of the optical feedback signal as adjusted. The comparison unit compares the first and second measurement signals, so as to generate an error signal. The control unit is used for generating the set signal output, and according to the error signal, generating a control signal output used for adjusting an optical signal transmitted by the optical communication system.

Description

\¥0 2019/116240 ?01/162018/059900 Control device and method for optimizing transmission performance of optical communication system

Technical field

The present invention relates to a control apparatus and method for optimizing transmission performance, and more particularly to a control apparatus and method for optimizing transmission performance of an optical communication system. Background technique

Referring to FIG. ₁ , a prior art optical communication system is disclosed in US Pat. No. _{7,609,981 B2} , which includes a light emitter ₁₁ , an optical link ₁₂ , an optical receiver ₁₃ , and a control unit ₁₄ . The light emitter ₁₁ converts an input signal into an optical signal and transmits the optical signal to the optical receiver ₁₃ via the optical link ₁₂ . The optical receiver ₁₃ outputs the optical signal as an electrical signal, and the optical receiver ₁₃ obtains a bit error rate ©i _{t Error Rate} for indicating the optical signal according to the optical signal _{. The BER)} measures the signal and transmits the measurement signal to the control unit ₁₄ .

When the _BER indicated by the measurement signal is greater than a predetermined value, the control unit ₁₄ may generate and send a control signal to the optical transmitter ₁₁ , the optical link ₁₂ or the optical receiver ₁₃ according to the _BER _. The optical transmitter ₁₁ , the optical link ₁₂ or the optical receiver ₁₃ is adjusted to improve the optical communication system link performance and reduce the _BER . When the _{BER is} lower than the predetermined value, the control unit ₁₄ cannot continuously control the output of the control signal according to the _BER to control the optical transmitter ₁₁ , the optical link ₁₂ or the optical receiver ₁₃ . Therefore, the control unit ₁₄ causes the control signal to output _dithering and offset, so that the _{BER is} increased, and the control unit ₁₄ can continue to adjust the control signal output according to the _BER to control the light emitter ₁₁ , The optical link ₁₂ or the optical receiver ₁₃ ensures that all components of the existing optical communication system operate at optimal settings. However, the manner in which the control signal is outputted with offset and jitter causes a decrease in link transmission performance of the existing optical communication system. Summary of the invention

Accordingly, it is an object of the present invention to provide a control apparatus for optimizing link transmission performance of an optical communication system.

Therefore, the control device for optimizing the transmission performance of an optical communication system is adapted to receive an optical feedback signal split by a beam splitter of the optical communication system, and generate a control signal output according to the optical feedback signal. To adjust this \¥0 2019/116240 卩 (: 17162218/059900 optical signal transmitted by an optical communication system. The control device includes a light detecting unit, a comparing unit, and a control list) 1_1

The light detecting unit is configured to receive the optical feedback signal, and receive a set signal output, and output the adjusted optical feedback signal according to the set signal to generate a first measurement signal and a second measurement signal. The first and second measurement signals are each associated with one of an error rate, a 9 factor, and a signal to noise ratio adjusted by the optical feedback signal.

The comparison unit is coupled to the light detecting unit to receive the first and second measurement signals, and compare the first and second measurement signals to generate an error signal.

The control unit is configured to generate the set signal output, and transmit the set signal output to the light detecting unit, and contact the comparing unit to receive the error signal, and the control unit generates the control signal output according to the error signal .

Accordingly, it is another object of the present invention to provide a control method for optimizing link transmission performance of an optical communication system.

Thus, the control method of the present invention for optimizing the transmission performance of an optical communication system is performed by a control device. The control device is adapted to receive an optical feedback signal separated by a beam splitter of the optical communication system, and the control method comprises the following steps:

(8) generating a first setting signal according to a control command for instructing the control device to operate in one of a dispersion control mode and a wavelength control mode;

Adjusting the optical feedback signal according to the first setting signal to obtain a first measurement related to one of a bit error rate, a chirp factor and a signal to noise ratio adjusted by the optical feedback signal Signal

(0) generating a second setting signal according to the control command;

1) adjusting the optical feedback signal according to the second setting signal to obtain a second quantity related to one of a bit error rate, a zero factor and a signal to noise ratio adjusted by the optical feedback signal. Measuring signal

Obtaining an error signal based on the first and second measurement signals; and

(According to the error signal, a control signal output for adjusting an optical signal transmitted by the optical communication system is generated.

The technical effect of the present invention is that the control unit generates the control signal output according to the error signal to monitor the optical communication system to have high monitoring sensitivity, and the control unit does not need to be as prior art.

Below a predetermined value, the existing control unit needs to output jitter and offset of the control signal output. In this way, the link transmission performance of the optical communication system can be avoided. \¥0 2019/116240 ?01/162018/059900 BRIEF DESCRIPTION OF THE DRAWINGS

Other features and technical effects of the present invention will be apparent from the embodiments of the accompanying drawings, wherein: Figure 1 is a block diagram illustrating an existing optical communication system;

Figure ₂ is a block diagram showing a first embodiment of the control device of the present invention for use with an optical communication system;

₅ FIG. ₃ is a waveform diagram illustrating the operation of the first embodiment and the second measuring signal when the control mode is a dispersion of the first embodiment;

Figure ₄ is a waveform diagram illustrating an error signal when the first embodiment operates in the dispersion control mode; Figure ₅ is a waveform diagram illustrating the first operation of the first embodiment in a wavelength control mode And a second measurement signal;

₁₀ FIG ₆ is a waveform diagram illustrating the operation of the embodiment of the error signal when the wavelength of a first embodiment of the control mode;

Figure ₇ is a block diagram showing a second embodiment of the control device of the present invention;

Figure ₈ is a block diagram showing a third embodiment of the control device of the present invention;

₉ and ₉₈ are flowcharts illustrating that the control apparatus of the third embodiment performs a control method to optimize transmission performance of an optical communication system;

Optimize the transmission performance of the optical communication system.

Description of the reference signs:

₂ , _2' , _2" control device eight ₈₂ second optical amplification signal

2 ₁ , _21" light detection unit ^ control command

2 ₁₀ tunable dispersion compensation module ₀₁ has compensated for optical signals

2 ₁₁ splitter module _3⁄4 control signal output

2 ₁₄ first photoelectric conversion module E _S error signal

2 ₁₅ second photoelectric conversion module worker ₈ input signal

2 ₁₇ second detection module _1X optical signal output

2 ₁₈ photoelectric conversion module ₁ ^·light feedback signal

2 ₂ comparing unit ₁₂ second splitting signal \¥0 2019/116240 ?01/162018/059900

23 control unit 1^1 first light adjustment signal

3 optical communication system 1^2 second light adjustment signal

31 light emitters! First measurement signal

33 optical link ₃₀ initial setting signal

34 tunable dispersion compensator 31 first setting signal

35 splitter 32 second set signal

36 optical receiver 40~48 steps

Eight _£1 first optical amplification signal 441~443 substeps

481~483 substeps 461~463 substeps

50~58 steps 561~563 substeps

541~ 543 sub-steps 581~583 sub-steps

Before the present invention is described in detail, it should be noted that in the following description, similar elements and signals are denoted by the same reference numerals.

Referring to FIG. _2, an embodiment of the control device ₂ of the present invention is adapted to be coupled to an optical communication system ₃ for receiving an optical feedback signal _Lf , and generating a control signal output _Co according to the optical feedback signal _Lf to adjust the optical communication. The optical signal transmitted by system ₃ is optimized for the link transmission performance of the optical communication system ₃ .

The optical communication system 3 is a single-wavelength optical transmission system, and includes a light emitter 31, an optical amplifier 32, an optical link 33, and a tonable dispersion having a tonable offset compensation value. A Tunable Dispersion Compensation (TCC) device 34, a beam splitter 35, and a light receiver 36.

The light emitter _{31 is configured} to receive an input signal _Is and convert the input signal _Is into an optical signal _Ls . The optical amplifier _{32 is} coupled to the optical transmitter ₃₁ to receive the optical signal _Ls , and amplifies the optical signal _Ls to generate a first optical amplified signal _As1 . The optical link _{33 is in} contact with the optical amplifier ₃₂ to receive the first optical amplified signal _As1 , and accordingly outputs a second optical amplified signal _As2 having dispersion. The _TDC device _{34 is} coupled to the optical link ₃₃ to receive the second optical amplification signal _As2, and performs dispersion compensation on the second optical amplification signal _As2 according to the tunable dispersion compensation value to generate a compensated optical signal _C1. . The beam splitter _{35 is in} contact with the _TDC unit ₃₄ to receive the compensated optical signal _C1 , and divides the compensated optical signal _C1 into an optical signal output _Lo sent to the optical receiver ₃₆ _, and is sent to the control device ₂ . The light feedback signal _Lf . In this embodiment, the beam splitter ₃₅ sets the compensated optical signal _C1 at _{90:10 (} the optical signal The output Lo of \¥0 2019/116240 ?01/162018/059900 is divided by the ratio of the optical feedback signal Lf, L〇 _{: Lf)} , but is not limited thereto. The control device 2 will be described below in the first embodiment, the second embodiment, and the third embodiment, respectively.

á first embodiment ñ

The control device 2 comprises a light detecting unit 21, a comparing unit 22, and a control unit 23.

The light detecting unit 21 is adapted to be coupled to the beam splitter 35 to receive the light feedback signal Lf, and receive a set signal output, and adjust the light feedback signal Lf according to the set signal output to generate the first The second measurement signals Msl, Ms2. Each of the first and second measurement signals Ms1 and Ms2 is associated with a bit error rate (BER), a _Q factor ( _{Q factor),} and a signal to noise ratio after the adjustment of the optical feedback signal Lf. One of Si _{gnal-to-noise} ratio, SNR). In this embodiment, the setting signal output includes a first setting signal S1 and a second setting signal S2. The light detecting unit 21 includes a light splitting module 211, first and second adjusting modules 212 and 213, first and second photoelectric conversion modules 214 and 215, and first and second detecting modules 216 and 217.

The optical splitting module 211 is configured to receive the optical feedback signal Lf, and divide the optical feedback signal Lf into equal proportions (ie, divide the optical feedback signal Lf by a ratio of 50:50) to generate the same power. First and second splitting signals LI, L2〇

The first and second adjustment modules 212 and 213 are coupled to the optical splitting module 211 to receive the first and second splitting signals L1 and L2, respectively, and receive the first and second setting signals S1, respectively. S2. The first and second adjustment modules 212 and 213 respectively adjust the first and second splitting signals LI and L2 corresponding to the first and second setting signals S1 and S2 to respectively generate the first And second light adjustment signals Lai, La2.

The first and second photoelectric conversion modules 214 and 215 are respectively coupled to the first and second adjustment modules 212 and 213 to respectively receive the first and second light adjustment signals Lal and La2, and respectively The first and second light adjustment signals Lal, La2 perform photoelectric conversion to generate first and second adjustment signals Eal, Ea2, respectively. In this embodiment, the first and second photoelectric conversion modules 214, 215 are each a conventional PIN type photodiode, but are not limited thereto.

The first and second detection modules 216 and 217 are respectively coupled to the first and second photoelectric conversion modules 214 and 215 to receive the first and second adjustment signals Eal and Ea2, respectively, and according to the first The first and second adjustment signals Eal, Ea2 generate the first and second measurement signals Msl, Ms2. The first and second measurement signals Ms1 and Ms2 are respectively associated with one of a BER, a _Q factor, and an SNR of the first and second adjustment signals Eal and Ea2. In this embodiment, the first and second measurement signals Ms1 and Ms2 are respectively related to the BER of the first and second adjustment signals Eal and Ea2, but are not limited thereto. The first and second detecting modules 216, 217 first measure the BER of each of the first and second adjusting signals Eal, Ea2, respectively, and perform a logarithm (lo _garithmic) calculation on the measured results of the BER. Lo _{g (BER)} , obtaining the first and second measurement signals Msl corresponding to each, \¥0 2019/116240 ?01/162018/059900

The comparing unit 22 is coupled to the first and second detecting modules 216, 217 to receive the first and second measuring signals 1, 3⁄43⁄42, respectively.

Comparing (8卩, subtracting the first measurement signal 1 from the second measurement signal 182) to generate an error signal

The control unit 23 is configured to simultaneously generate the first and second setting signals 31, 52 (8, the setting signal output), and transmit the first and second setting signals 31, 32 to the The first and second adjustment modules 212, 213. Control unit

And according to the error signal

This control signal output is generated <3⁄4.

It should be noted that when the first and second adjustment modules 212, 213 are each a dispersion adjustment module that can only adjust the dispersion value, the control device 2 can only operate in a dispersion control mode. The first and second setting signals 31, 52 generated by the control unit 23 respectively indicate a first additional dispersion value and a second additional dispersion value. For example, the first additional dispersion value and the second additional dispersion value may be opposite to each other, but are not limited thereto. The first and second adjustment modules 212 and 213 respectively add the first and second additional dispersion values to the first and second splitting signals 1 _^ 1 and 1 _^ 2 corresponding to the respective first and second adjustment signals to adjust the respective Corresponding to the dispersion of the first and second splitting signals 1 _^ 1 , 1 _^ 2 . In this way, the control signal output generated by the control unit 23 (: 〇 is output to the 0 (: the device 34, so that the 0 (: the device 34 according to the control signal output (3⁄4 adjust its own The chromatic dispersion compensation value further adjusts the chromatic dispersion of the second optical amplification signal 八₈ related to the optical signal transmitted by the optical communication system 3.

Referring to FIG. 3 and FIG. 4, the control device 2 operates in the dispersion control mode, and the optical signal is a 5868 (1 4th order pulse amplitude modulation (?83⁄414) optical signal, and its optical signal to noise ratio is 27 7(3⁄4, the first and second additional dispersion values

And the waveform of the error signal £8. The horizontal axis of Figs. 3 and 4 is the amount of residual dispersion of the compensated optical signal. As can be seen from Fig. 4, the error signal E _S has a polarity. When the error signal

When it is greater than zero, the control signal output generated by the control unit 23 (3⁄4 will cause the 0 (: the device 34 lowers its own tunable offset compensation value, so that the compensated optical signal (: 1 residual) The amount of dispersion decreases; conversely, when the error signal E _{S is} less than zero, the control signal output generated by the control unit 23 (3⁄4 causes the 0 (: 34) to raise its own tunable compensation value. Therefore, the compensated optical signal (: 1 has a residual dispersion amount increased. Thus, after a plurality of adjustments, the compensated optical signal (: 1 residual dispersion amount will eventually approach)

It is equal to zero to optimize the link transmission performance of the optical communication system 3. In addition, since the error signal E _S has a polarity, and as long as the error signal changes, the control unit 23 can know how to adjust the output of the control signal generated accordingly (3⁄4 to adjust the 0 (: 34 The tunable offset compensation value. That is, the control device 2 has high monitoring sensitivity and does not need to be as prior art

Existing control below a predetermined value \¥02019/116240 ?01/162018/059900 Unit ₁₄ (see Figure ₁ ) needs to output jitter and offset of the control signal output. As a result, the link transmission performance of the optical communication system ₃ can be avoided.

It should be noted that, in FIG. ₄ , due to the consideration of fiber dispersion and fiber nonlinear distortion or the light emitter ₃₁啁

5 The amount of dispersion is 1 (^ ₈ / ₁₁₁₁₁₎ .

In addition, when the first and second adjustment modules ₂₁₂ and ₂₁₃ are each an optical band pass filter module with only adjustable wavelengths, the first and second adjustment modules ₂₁₂ and ₂₁₃ have first and second centers respectively. The wavelength value, and the control device 2 is only operable in a wavelength control mode. The first and second setting signals ₃₁ , ₅₂ respectively indicate a first predetermined center wavelength shift value and a second preset center wavelength shift value. For example, the first preset center wavelength shift value and the ₁₀ second preset center wavelength shift value may be opposite to each other, but are not limited thereto. The first and second adjustment modules ₂₁₂ and ₂₁₃ respectively adjust the respective corresponding first and second preset center wavelength displacement values of the first and second setting signals ₃₁ and ₅₂ . One and second center wavelength values. Thus, the control signal of the control unit ₂₃ outputs the generated _(¾ is output to the light emitter _31, such that the light emitter ₃₁ _(¾ to adjust its output control signal based on the

₁₅ Referring to FIG. ₅ and FIG. _6, the control device ₂ for operation control mode at this wavelength, the optical signal is a _{1 ^} ₅₈₆₈ _(14-order pulse amplitude modulation _(? Eight _¾14) optical signal, and the optical signal-to _{27 7} (^, the first and second preset center wavelength shift values are 12 (^ ₈ / ! and -12 (^ ₈ / ₁₁₁₁₁ , respectively, the first and second measurement signals 1, And a waveform diagram of the error signal _{E. In} FIG. ₅ , for the first measurement signal ₁ , the horizontal axis is the center wavelength of the optical signal _1^ and the first center wavelength of the first adjustment module ₂₁₂ . The offset of the value. For the second measurement signal

\¥0 2019/116240 ?01/162018/059900 1111:;[?161;[1^, ¥03⁄4!) transmission system. In this embodiment, the light detecting unit 21 further includes a wavelength tunable filtering module (not shown) that is in contact between the beam splitter 35 and the beam splitting module 211 for pre-monitoring by the control device 2. The wavelength of the optical signal passes through and filters out other optical signals that are not to be monitored.

á second embodiment ñ

Referring to Figure 7, the second embodiment of the control device 2' of the present invention is similar to the first embodiment in that: the first and second 0 (: module 212) are used to adjust the wavelength and dispersion. ', 213' respectively replace the first and second adjustment modules 212, 213 of FIG. 2; the control unit 23 further receives a command for indicating that the control device 2' is operating in a dispersion control mode and a wavelength control mode a control command of one of the two (X, and according to the control, the first and second setting signals 31, 32 are simultaneously generated, so that the control device 2' is operable in the dispersion control mode and the wavelength control mode One of the two. When the control instruction

Instructing to operate in the dispersion control mode, the first and second setting signals 31, 52 respectively indicate the first and second additional dispersion values, the operation of the control device 2' and the control device 2 (see FIG. 2) operating in the dispersion control mode is the same; when the control command indicates operation in the wavelength control mode, the first and second setting signals 31, 32 respectively indicate the first and second pre- The central wavelength shift value is set, and the operation of the control device 2' is the same as the operation when the control device 2 operates in the wavelength control mode, and thus will not be described herein.

á third embodiment ñ

Referring to FIG. 8, the third embodiment of the control device 2" of the present invention is similar to the second embodiment, and the difference is that: the light detecting unit 21 is replaced by a light detecting unit 21" (see FIG. 7); The control unit 23 sequentially generates an initial setting signal 30 and the first and second setting signals 51, 32 according to the control command (^, which is instructed to operate in the dispersion control mode or the wavelength control mode. The initial setting signal 30, the first and second setting signals 31, 52 are combined to form the setting signal output. In this embodiment, the light detecting unit 21" includes a 0 (: module 210, a photoelectric The conversion module 218, and a detection module 219.

The 100 module 210 is configured to receive the optical feedback signal 1 , and sequentially receive the initial setting signal 30 and the first and second setting signals 31 , 32 . The 100 module 210 first adjusts one of a center wavelength value and a tonal dispersion compensation value that it has according to the initial setting signal 30. Then, the 0 (the module 210 adjusts the optical feedback signal 1^ according to the first setting signal to generate the first optical adjustment signal 1^1. Finally, the 100 module 210 is based on the second setting signal. Adjusting the optical feedback signal 1^ to generate the second optical adjustment signal 1^2. The photoelectric conversion module 218 is coupled to the 100 module 210 to sequentially receive the first and second optical adjustment signals 1^1. The first and second optical adjustment signals 1^1 and 1^2 are photoelectrically converted to sequentially generate the first and second adjustment signals, respectively. The detection module 219 is coupled to the photoelectric The conversion module 218 receives the first and second in sequence \¥0 2019/116240 ?01/162018/059900

It is noted that, in this embodiment, the ₁₀ (: module ₂₁₀ after the initial setting signal to adjust the center wavelength has its own value ₅₀ or value of the tunable dispersion compensator according to the photodetection unit _{21 '} Will receive the first setting first

Signal _32, and the second measurement signal _{2 is} generated again. The time when the second setting signal ₅₂ is generated by the control unit ₂₃ and the time interval at which the first setting signal ₃₁ is generated is a preset time (8卩, the light detecting unit _{21) needs to} generate the first measuring signal ₁ time).

1 ₀ set _2" performs a control method to optimize the transmission performance of the optical communication system ₃ (see FIG. ₂ ), and the control method includes the following steps.

Step _40: The control unit ₂₃ according to the control command (^, the ₀ (: The tunable dispersion compensation value adjuster ₃₄ is a predetermined value in this embodiment, the predetermined value is zero, but not Limited to this.

Step _41: The control unit ₂₃ generates and outputs the initial setting signal ₃₀ according to the control command (^).

₁₅ Step _42: The ₀ (: module ₂₁₀ adjusts its own central wavelength value according to the initial setting signal ₅₀ to

Step _43: The control unit ₂₃ generates the first setting signal ₃₁ indicating the first additional dispersion value according to the control instruction (^).

Step _44: The light detecting unit _{21 ′′} adjusts the optical feedback signal ₁ ^ according to the first setting signal ₅₁ to obtain ₂₀ the first measurement signal ₁ .

It should be noted that, in step ₄₄ , the detailed flow of sub-steps ₄₄₁ , ₄₄₂ , and ₄₄₃ is further included. Sub-step _441: The ₁₁ ^ module ₂₁₀ adds the first additional dispersion value of the first setting signal ₃₁ to the optical feedback signal ₁ ^ to obtain the first optical adjustment signal _1^1 .

Sub-step _442: the photoelectric conversion module ₂₁₈ photoelectrically converts the first light adjustment signal ₁₁₁ to obtain the

The second set signal ₃₂ of the dispersion value.

Step ₃₀ _: The light detecting unit _21" re-adjusts the light feedback signal according to the second setting signal ₅₂ , to \¥0 2019/116240 ?01/162018/059900 The second measurement signal _{2 is obtained} .

It should be noted that, in step ₄₆ , the detailed flow of sub-steps ₄₆₁ , ₄₆₂ , and ₄₆₃ is further included. Sub-step _461: The ₀₀ module ₂₁₀ adds the second additional dispersion value of the second setting signal ₃₂ to the optical feedback signal ₁ ^ to obtain the second optical adjustment signal _1^2 .

Sub-step _462: the photoelectric conversion module ₂₁₈ photoelectrically converts the second light adjustment signal _{1 2} to obtain the

Step _47: The comparison unit ₂₂ subtracts the first measurement signal _{1 from} the second measurement signal _{2 to} obtain the error signal £ ₈ .

₃ associated transmission channel amplifying system ₂ eight dispersive signal in the light of the second optical signal.

It should be noted that, in step ₄₈ , the detailed flow of sub-steps ₄₈₁ , ₄₈₂ , and ₄₈₃ is further included. Sub-step _481: The control unit ₂₃ determines whether the magnitude of the error signal _£ is greater than zero. If yes, proceed to sub-step _482; if not, proceed to sub-step ₄₈₃ .

D ₀ (: an adjustable dispersion compensation value of the magnitude of _34, and jumps back to sub-step ₄₄₁ to continue to monitor this repeatedly with the external environment (e.g., temperature) or have a different effect on the transmission distance of the dispersion changes The optical signal 〇 ₁ has been compensated.

The magnitude of the tunable offset compensation value of ₀ (: ₃₄₎ is jumped back to sub-step ₄₄₁ to continue execution.

Another control method performed by the device _2" to optimize the transmission performance of the optical communication system ₃ (see Fig. ₂ ) comprises the following steps.

Step _50: The control unit ₂₃ controls the light emitter ₃₁ to adjust the center wavelength of the optical signal transmitted by the control unit ₂₃ to a predetermined value according to the control command.

Step _51: The control unit ₂₃ generates and outputs the initial setting signal ₃₀ according to the control command (^).

Step _52: The ₁₀₀ module ₂₁₀ adjusts its own tunable compensation value to zero according to the initial setting signal ₃₀ .

Step _53: The control unit ₂₃ generates the first setting signal ₃₁ indicating the first preset center wavelength displacement value according to the control instruction (^). \¥0 2019/116240 ?01/162018/059900 Step 54: The light detecting unit 21" is based on the first setting signal

The optical feedback signal 1^· is adjusted to obtain the first measurement signal 1.

It should be noted that, in step 54, the detailed flow of sub-steps 541, 542, and 543 is further included.

Sub-step 541: The 100 module 210 adjusts the center wavelength value of the first predetermined center wavelength of the first setting signal 31, and generates the first light according to the optical feedback signal 1 Adjust the signal 1^1.

Sub-step 542: The photoelectric conversion module 218 photoelectrically converts the first light adjustment signal 1-1 to obtain the detection module 219 according to the first adjustment signal.

Getting related to the first adjustment signal

The first measurement signal is 3⁄43⁄41.

Step 55: After the preset time, the control unit 23 according to the control instruction

The second setting signal 32 indicating the second preset center wavelength shift value is generated.

Step 56: The light detecting unit 21" adjusts the optical feedback signal 1^ according to the second setting signal 52 to obtain the second measuring signal 2.

It should be noted that, in step 56, the detailed flow of sub-steps 561, 562, and 563 is further included.

Sub-step 561: the 100 module 210 re-adjusts its own central wavelength value according to the second preset central wavelength shift value of the second setting signal 32, and generates the second according to the optical feedback signal Light adjustment signal 1^2.

Sub-step 562: The photoelectric conversion module 218 photoelectrically converts the second light adjustment signal 1 2 to obtain the detection module 219 according to the second adjustment signal.

Obtained correlation with the second adjustment signal

The second measurement signal is 3⁄43⁄42.

Step 57: The comparison unit 22 subtracts the first measurement signal 1 from the second measurement signal 2 to obtain the error signal.

Step 58: The control unit 23 generates the control signal output according to the error signal £8 (: 〇, to adjust the light emission

The center wavelength.

It should be noted that, in step 58, the detailed flow of sub-steps 581, 582, and 583 is further included.

Sub-step 581: The control unit 23 determines whether the magnitude of the error signal £ ₈ is greater than zero. If yes, proceed to sub-step 582; if not, proceed to sub-step 583.

Sub-step 582: The control unit 23 generates the control signal output according to the error signal (3⁄4, to lower the center wavelength of the optical signal 1^, and jumps back to the sub-step 541 to continue execution to repeatedly monitor the optical signal.

The center wavelength. \ ¥ 0 2019/116240 01/162018/059900 sub-step _583:? The control unit ₂₃ generates the control signal output _(¾ based on the error signal, raised to the light

The control unit ₁₄ (see Fig. ₁ ) needs to output jitter and offset of the control signal outputted by it. In this way, the link transmission performance of the ₁₀ optical communication system ₃ can be avoided to achieve the purpose of optimizing the transmission performance of the optical communication system ₃ .

The above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, and any simple equivalent changes and modifications made according to the contents of the present invention and the patent specification are still Within the scope of the invention patent.

Claims

\¥0 2019/116240 ?01/162018/059900 Claims

A control device for optimizing transmission performance of an optical communication system, adapted to receive an optical feedback signal segmented by a beam splitter of the optical communication system, and generate a control signal according to the optical feedback signal Outputting to adjust an optical signal transmitted by the optical communication system, the control device comprising:

a light detecting unit, configured to receive the light feedback signal, and receive a set signal output, and output the light feedback signal according to the set signal output to generate a first measurement signal and a second measurement signal The first and second measurement signals are each associated with one of an error rate, a 9 factor, and a signal to noise ratio adjusted by the optical feedback signal;

a comparison unit coupled to the light detecting unit to receive the first and second measurement signals, and comparing the first and second measurement signals to generate an error signal;

a control unit for generating the set signal output, and transmitting the set signal output to the light detecting unit, and coupled to the comparing unit to receive the error signal, the control unit generating the control signal according to the error signal Output.

The control device according to claim 1, wherein the comparing unit subtracts the first measurement signal from the first measurement signal to obtain the error signal.

The control device of claim 1 , wherein the setting signal output comprises a first setting signal and a second setting signal, the light detecting unit comprises

a splitting module, configured to receive the optical feedback signal, and divide the optical feedback signal into equal proportions to generate a first splitting signal and a second splitting signal having the same power.

a first adjustment module and a second adjustment module are coupled to the optical splitting module to respectively receive the first and second splitting signals, and respectively receive the first and second set signals, and respectively according to the first The first and second set signals respectively adjust the first and second splitting signals to respectively generate a first light adjustment signal and a second light adjustment signal,

a first photoelectric conversion module and a second photoelectric conversion module are respectively coupled to the first and second adjustment modules to respectively receive the first and second light adjustment signals, and respectively respectively perform the first and second The light adjustment signal is photoelectrically converted to generate a first adjustment signal and a second adjustment signal, respectively, and

a first detection module and a second detection module are respectively coupled to the first and second photoelectric conversion modules to respectively receive the first and second adjustment signals, and respectively according to the first and second adjustment signals Generating the first and second measurement signals, wherein the first and second measurement signals are respectively associated with a bit error rate, a 9 factor, and a signal to noise ratio of the first and second adjustment signals, respectively. One of them.

The control device according to claim 3, wherein

Each of the first and second adjustment modules is a dispersion adjustment module, and the first and second setting signals respectively indicate a first additional dispersion value and a second additional dispersion value, and

The first and second adjustment modules respectively adjust the dispersion of the first and second splitting signals corresponding to the first and second setting signals, and the optical communication system outputs and adjusts the light according to the control signal. The dispersion of the signal.

The control device according to claim 3, wherein \¥0 2019/116240 ?01/162018/059900 The first and second adjustment modules are each an adjustable wavelength optical band pass filter module, and the first and second setting signals respectively indicate a first pre- Setting a central wavelength shift value and a second predetermined center wavelength shift value, and

The first and second adjustment modules respectively have first and second center wavelength values, and respectively adjust respective first and second center wavelength values according to the first and second setting signals, The optical communication system adjusts a center wavelength of the optical signal according to the control signal output.

_{6. The} control apparatus according to claim _3, wherein,

The first and second adjustment modules are respectively a first tonable dispersion compensation module and a second chromatic dispersion compensation module that can be used to adjust wavelength and dispersion.

The control unit further receives a control command for indicating operation in one of a dispersion control mode and a wavelength control mode, and further generates the setting signal output according to the control command, so that the control device is operable One of a dispersion control mode and the wavelength control mode,

When operating in the dispersion control mode, the control signal output generated by the control unit is used to adjust the dispersion of the optical signal, and

When operating in the wavelength control mode, the control signal output generated by the control unit is used to adjust a center wavelength of the optical signal.

_{7. The} control apparatus according to claim _1, wherein,

_{8. The} control device according to claim _7, wherein the control unit sequentially generates and outputs a control signal according to the initial setting instruction, setting a first setting signal and a second signal, the initial setting And combining the first and second setting signals into the set signal output, the light detecting unit includes

a tunable dispersion compensation module, configured to receive the optical feedback signal, and sequentially receive the initial setting signal and the first and second setting signals, the tonable dispersion compensation module first according to the initial setting The fixed signal adjusts one of a center wavelength value and a tonable offset compensation value, and then adjusts the optical feedback signal according to the first setting signal to generate a first light adjustment signal. Finally, adjusting the optical feedback signal according to the second setting signal to generate a second optical adjustment signal,

a photoelectric conversion module coupled to the tonable compensation module for sequentially receiving the first and second optical adjustment signals, and photoelectrically converting the first and second optical adjustment signals to sequentially generate a first adjustment signal and a second adjustment signal, and

a detection module coupled to the photoelectric conversion module to sequentially receive the first and second adjustment signals, and according to the \¥0 2019/116240 ?01/162018/059900 The first and second adjustment signals respectively generate the first and second measurement signals, and the first and second measurement signals are respectively related to the first One of the first and second adjustment signals, one of a bit error rate, a factor of _nine, and a signal to noise ratio.

_{9. The} control apparatus of claim ₆ or claim _8, wherein,

When the control command indicates that the operation is in the dispersion control mode, the first and second setting signals respectively indicate a first additional dispersion value and a second additional dispersion value, and

When the control command is instructed to operate in the wavelength control mode, the first and second setting signals respectively indicate a first predetermined center wavelength shift value and a second preset center wavelength shift value.

10. A control method for optimizing transmission performance of an optical communication system, executed by a control device, the control device being adapted to receive an optical feedback signal segmented by a beam splitter of the optical communication system, The control method consists of the following steps:

(〇) generating a second setting signal according to the control command;

1) re-adjusting the optical feedback signal according to the second setting signal to obtain a second one of a bit error rate, a zero factor and a signal to noise ratio adjusted according to the optical feedback signal. Measuring signal

_11. The control method according to claim _10, wherein, in the step), the control means measuring the first signal minus the second measurement signal, the error signal is obtained.

_12. The control method according to claim _10, wherein the optical communication system comprises a tonable dispersion compensator having a tunable dispersion compensation value, the control device comprising a tunable dispersion compensation having a center wavelength value a module, wherein the control command instructs the control device to operate in the dispersion control mode, and further comprises the following steps before the step:

( ₆ ) adjusting the tunable offset compensation value of the tunable dispersion compensator to a predetermined value according to the control instruction;

0 ₁ ) generating and outputting an initial setting signal according to the control command;

(I) adjusting the center wavelength value of the tunable dispersion compensation module to be the same as a center wavelength of the optical signal based on the initial setting signal.

_The control method according to claim _12, the first and second set of such signals are indicative of a first additional value and a second additional dispersion dispersion value, wherein

Step) includes the following substeps

1) adding the first additional dispersion value of the first setting signal to the optical feedback signal to obtain a first optical adjustment signal,

©3) obtaining, according to the first adjustment signal, the first measurement signal related to one of a bit error rate factor and a signal to noise ratio of the first adjustment signal, and

Step 1) includes the following substeps

©1) adding the second additional dispersion value of the second setting signal to the optical feedback signal to obtain a second optical adjustment signal,

©3) obtaining, according to the second adjustment signal, the second measurement signal related to one of a bit error rate factor and a signal to noise ratio of the second adjustment signal.

The control method according to claim 12, wherein the step (including the following substeps)

(?1) determine whether the size of the error signal is greater than zero,

(?2) When the judgment result of the sub-step (?1) is YES, the control signal output is generated according to the error signal to reduce the magnitude of the tunable compensation value, and

(?3) When the judgment result of the sub-step (?1) is NO, the control signal output is generated based on the error signal to increase the magnitude of the gradable offset compensation value.

The control method according to claim 10, wherein the control device comprises a tonable dispersion compensation module having a tunable offset value and a center wavelength value, wherein the control command indicates that the control device operates The wavelength control mode, and before the step), also includes the following steps:

0) adjusting a center wavelength of the optical signal to a predetermined value according to the control instruction;

00 generating and outputting an initial setting signal according to the control instruction; and

And adjusting the tunable offset compensation value of the tunable dispersion compensation module to zero according to the initial setting signal.

The control method of claim 15, wherein the first and second setting signals respectively indicate a first preset center wavelength shift value and a second preset center wavelength shift value, wherein

Step) includes the following substeps

1) adjusting the center wavelength value of the tunable dispersion compensation module according to the first setting signal, and generating a first light adjustment signal,

Step 1) includes the following substeps

©1) re-adjusting the center wavelength value of the tonable compensation module according to the second setting signal, and generating a second light adjustment signal,

The control method according to claim 15, wherein the step (including the following substeps) \¥0 2019/116240 ?01/162018/059900

(?1) determine whether the size of the error signal is greater than zero,

(?2) when the judgment result of the step (?1) is YES, the control signal output is generated according to the error signal to lower the center wavelength of the optical signal, and

(?3) When the judgment result of the step (?1) is NO, the control signal output is generated based on the error signal to raise the center wavelength of the optical signal.