CN111064474B - High-speed laser-microwave link serial-parallel conversion method - Google Patents

High-speed laser-microwave link serial-parallel conversion method Download PDF

Info

Publication number
CN111064474B
CN111064474B CN201911348846.3A CN201911348846A CN111064474B CN 111064474 B CN111064474 B CN 111064474B CN 201911348846 A CN201911348846 A CN 201911348846A CN 111064474 B CN111064474 B CN 111064474B
Authority
CN
China
Prior art keywords
signal
speed
optical
output
gbps
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201911348846.3A
Other languages
Chinese (zh)
Other versions
CN111064474A (en
Inventor
高铎瑞
谢小平
汪伟
谢壮
胡辉
苏玉龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XiAn Institute of Optics and Precision Mechanics of CAS
Original Assignee
XiAn Institute of Optics and Precision Mechanics of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by XiAn Institute of Optics and Precision Mechanics of CAS filed Critical XiAn Institute of Optics and Precision Mechanics of CAS
Priority to CN201911348846.3A priority Critical patent/CN111064474B/en
Publication of CN111064474A publication Critical patent/CN111064474A/en
Application granted granted Critical
Publication of CN111064474B publication Critical patent/CN111064474B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M9/00—Parallel/series conversion or vice versa

Abstract

The invention provides a high-speed laser-microwave link serial-parallel conversion method, which solves the problem that the existing laser link and microwave link are not matched in speed. The method comprises the following steps: 1) the speed of the high-speed optical signal is reduced, 1.1) the M Gbps high-speed NRZ optical signal is converted into an electric signal; 1.2) the electric signal enters a clock data recovery unit to recover M Gbps data and M/2GHz clock signals; 1.3) the M Gbps data is remodulated to an optical carrier by a Mach-Zehnder modulator and converted into an M Gbps optical signal; 1.4) the first dual-output Mach-Zehnder modulator selectively separates the odd-even channels of the M Gbps optical signals and outputs 2 paths of M/2Gbps RZ optical signals with high isolation and low crosstalk; step two, judging whether the data rate of the output optical signal after speed reduction is less than or equal to the maximum value A of the output signal after speed reduction; if the speed is not satisfied, continuing to reduce the speed until the condition is satisfied; after deceleration 2NWay M/2NGbps RZ signal enters D flip-flop and is output 2NWay M/2NGbps NRZ signal.

Description

High-speed laser-microwave link serial-parallel conversion method
Technical Field
The invention belongs to the space laser communication technology, and particularly relates to a high-speed laser-microwave link serial-parallel conversion method.
Background
With the rapid development of information technology and space technology, the amount of information acquired and processed for transmission by various aircraft in the space, in the vicinity of the space, is growing explosively. The data rate of the synthetic aperture radar is expected to reach 60Gbps in 2020, while the data rate of the hyperspectral imager is expected to reach 100Gbps, which puts higher requirements on the bandwidth, capacity, reliability and the like of a space-based information transmission system taking satellite communication as a core network. Compared with a microwave communication mode, the satellite laser communication has the advantages of wide frequency band, small antenna size, small size, light weight, low power consumption, good confidentiality, strong anti-interference capability, no frequency supervision limitation and the like, and can meet the requirements of a future space-ground integrated information transmission system on high-speed, large-capacity and multi-service information transmission and processing.
At present, laser communication in the world is point-to-point, and communication relay, networking and application are seriously influenced. The satellite laser communication networking is that a plurality of satellites are connected through a high-speed laser information transmission link, and a main satellite network for space information transmission is established. The space satellite, the aircraft, the detector and the like do not need to directly establish a single information channel with a ground station, only need to transmit to a certain nearby trunk satellite network node, and then transmit the acquired information back to the ground through the trunk satellite network. Due to the wide area coverage of the backbone satellite network, information acquired by various satellites, aircrafts, detectors and the like in different airspaces can be transmitted through the backbone satellite network, and the network selects an optimal path to transmit back to a ground station or realizes sharing among space platforms, so that real-time information transmission can be realized. Therefore, it will become a necessary trend for the development of satellite communication technology to establish a satellite laser switching network to realize real-time, global and large-capacity information transmission and exchange.
Because the laser communication optical ground station can only be established in a certain area, the communication between the satellite and the ground station is limited by factors such as atmosphere and geographic conditions, and the like, the point-to-point transmission links between the satellite and between the satellite and the ground station are established only by adopting a laser communication mode, and all-weather and real-time information transmission cannot be realized. The single transmission channel also reduces the reliability of the transmission link, and a problem with a device in the transmission link can cause an interruption of the entire transmission link. Therefore, establishing an information transmission means capable of ensuring high speed, real-time performance and global performance of the satellite becomes a key technology in satellite communication.
The laser and microwave link hybrid transmission can ensure high speed of laser signals and high reliability of microwave signals. However, the laser link and the microwave link are not matched in speed, the transmission speed of the microwave link can reach Gbps at the highest usually, and the high-speed laser link is at dozens of Gbps usually, so that the high-speed data conversion transmission from the laser link to the microwave link cannot be directly realized, and the high-speed laser link needs to be subjected to speed reduction processing. The existing technology for realizing high-speed signal serial-parallel conversion in an electric domain is mature, but the conversion of a laser signal with higher speed is difficult to realize due to the problem of 'speed bottleneck' of an electronic logic chip.
Disclosure of Invention
The invention provides a high-speed laser-microwave link serial-parallel conversion method, aiming at solving the technical problems that the existing laser link is not matched with the microwave link in speed and the conversion of laser signals with higher speed is difficult to realize in an electric domain.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a high-speed laser-microwave link serial-parallel conversion method is characterized by comprising the following steps:
step one, the first speed reduction of the high-speed optical signal
1.1) photoelectrically converting a high-speed NRZ optical signal at M Gbps into an electrical signal, wherein M is more than 0;
1.2) the converted electric signal enters a clock data recovery unit, and M Gbps data and an M/2GHz clock signal are recovered by the clock data recovery unit;
1.3) the laser emits continuous light to a Mach-Zehnder modulator (MZM), M Gbps data is remodulated on an optical carrier through the MZM, converted into M Gbps optical signals, and sequentially enters a first optical delayer and a first dual-output Mach-Zehnder modulator;
1.4) the M/2GHz clock signal recovered in the step 1.2) enters a first dual-output Mach-Zehnder modulator to be used as a modulation signal of a third dual-output Mach-Zehnder modulator (10);
meanwhile, the first optical delayer is controlled to align the phases of the M/2GHz clock signal and the M Gbps optical signal, and the first dual-output Mach-Zehnder modulator selects and separates the odd-even channel of the M Gbps optical signal according to the input M/2GHz clock signal and outputs 2 paths of M/2Gbps RZ optical signals with high isolation and low crosstalk;
step two, first judgment
Judging the data rate B of the output optical signal after the first speed reduction1Whether the maximum value A of the speed reduction output signal is less than or equal to the maximum value A of the speed reduction output signal;
if B is1If the speed of the high-speed optical signal is less than or equal to A, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
if B is1If the value is more than A, executing a third step;
wherein, B1＝M/2；
Step three, the second speed reduction of the high-speed optical signal
3.1) each path of M/2Gbps RZ optical signal sequentially enters a second optical delayer and a second double-output Mach-Zehnder modulator;
3.2) dividing the M/2GHz clock signal recovered in the step 1.2) by a frequency divider (13), changing the frequency into M/4GHz, and using the M/4GHz clock signal as a modulation signal of a second double-output Mach-Zehnder modulator (8);
meanwhile, a second optical delayer is controlled to align the phases of an M/4GHz clock signal and an M/2Gbps RZ optical signal, and the second dual-output Mach-Zehnder modulator selectively separates the odd-even channels of the M/2Gbps RZ optical signal according to the input M/4GHz clock signal and outputs 2 paths of M/4Gbps RZ optical signals with high isolation and low crosstalk;
then, 2 paths of M/2Gbps RZ optical signals are converted to output 4 paths of M/4Gbps RZ optical signals;
step four, judging for the second time
Judging the data rate B of the output optical signal after the second speed reduction2Whether the maximum value A of the speed reduction output signal is less than or equal to the maximum value A of the speed reduction output signal;
if B is2If the speed of the high-speed optical signal is less than or equal to A, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
if B is2If the value is more than A, executing a fifth step;
wherein, B2＝M/4；
Step five, third speed reduction of the high-speed optical signal
5.1) each path of M/4Gbps RZ optical signal sequentially enters a third optical delayer and a third dual-output Mach-Zehnder modulator;
5.2) dividing the frequency of the M/4GHz clock signal subjected to the frequency reduction in the step 3.2) again by a frequency divider (13), changing the frequency into M/8GHz and using the M/8GHz clock signal as a modulation signal of a third double-output Mach-Zehnder modulator (10);
meanwhile, a third optical delayer is controlled to align the phases of an M/8GHz clock signal and an M/4Gbps RZ optical signal, and the third dual-output Mach-Zehnder modulator selectively separates the odd-even channels of the M/4Gbps RZ optical signal according to the input M/8GHz clock signal and outputs 2 paths of M/8Gbps RZ optical signals with high isolation and low crosstalk;
then, the 4 paths of M/4Gbps RZ optical signals are converted and output 8 paths of M/8Gbps RZ optical signals;
sixth, third judgment
Judging the data rate B of the output optical signal after the third speed reduction3Whether the maximum value A of the speed reduction output signal is less than or equal to the maximum value A of the speed reduction output signal;
if B is3If the speed of the high-speed optical signal is less than or equal to A, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
if B is3If the speed is higher than A, continuing to perform optical signal speed reduction according to the method in the fifth step until the data rate of the output optical signal after speed reduction is less than or equal to the maximum value A of the speed-reduced output signal, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
step seven, signal output
2 after N decelerationsNWay M/2NThe Gbps RZ signal is photoelectrically converted into an electric signal and enters a D trigger, and N is a positive integer greater than or equal to 1;
at the same time, an M/2 input is input to the D flip-flopNGHz clock signal, the clock signal and M/2NThe phase of Gbps RZ signal is aligned to complete the RZ-NRZ conversion of optical signal and output 2NWay M/2NGbps NRZ signal.
Further, the maximum value a of the speed-reduction output signal is the maximum value of the single-channel microwave signal.
Further, in step 1.3), the optical signal converted into M Gbps enters an optical amplifier for amplification and then enters a first optical delayer.
Further, the amplifier is an erbium-doped fiber amplifier.
Further, in step 1.1), the high-speed NRZ optical signal of M Gbps is converted into an electrical signal by a first photodetector;
in step seven, 2 after N times of speed reductionNWay M/2NThe Gbps RZ signal is converted into an electric signal by the second photoelectric detector and then enters the D trigger.
Compared with the prior art, the invention has the advantages that:
1. the conversion method adopts a plurality of cascaded optical delayers and dual-output modulators and is matched with a clock signal to carry out speed reduction processing on a high-speed laser signal, thereby realizing the conversion from the high-speed laser signal with dozens of Gbps magnitude to a microwave magnitude signal, reducing the speed of the high-speed laser signal into multi-path low-speed data, realizing data microwave transmission and solving the problem of mismatching of the satellite laser and the microwave speed.
2. The method has the characteristics of instantaneous response, high isolation, low crosstalk, zero packet loss and automatic synchronization.
Drawings
FIG. 1 is a schematic diagram of the speed reduction of a high-speed laser-microwave link serial-parallel conversion method according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of the speed reduction of the second embodiment of the serial-to-parallel conversion method of the high-speed laser-microwave link according to the present invention;
wherein the reference numbers are as follows:
1-a first photodetector, 2-a clock data recovery unit, 3-a laser, 4-a Mach-Zehnder modulator (MZM), 5-a first optical delayer, 6-a first dual-output Mach-Zehnder modulator, 7-a second optical delayer, 8-a second dual-output Mach-Zehnder modulator, 9-a third optical delayer, 10-a third dual-output Mach-Zehnder modulator, 11-a second photodetector, 12-D flip-flop, 13-a frequency divider, 14-an optical amplifier.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
When the laser link (10Gbps) is interrupted or damaged, the data cannot be transmitted at high speed by laser, and the data transmission can be realized by adopting a microwave backup link (Gbps). But high-speed laser signals cannot be directly transmitted due to the limited bandwidth of the microwave link. Therefore, the invention provides the method for carrying out speed reduction processing on the high-speed laser signals, wherein the speed reduction is multi-path low-speed data, and the data microwave transmission is realized.
The invention provides a serial-parallel conversion method of a laser-microwave link, which outputs 2 high-speed optical signals of M Gbps through N-time speed reduction and a plurality of cascaded optical delayers and dual-output Mach-Zehnder modulatorsNWay M/2NLow speed microwave signals at Gbps, where N is the number of speed reductions. The alignment of the optical signal and the clock signal can be accurately controlled through an Optical Delayer (ODL); the double-output Mach-Zehnder modulator realizes the selection and separation of the odd-even channels of the original signals by inputting a half-rate clock signal and outputs two paths of half-rate signals.
The conversion method comprises the following steps:
step one, the first speed reduction of the high-speed optical signal
1.1) photoelectrically converting a high-speed NRZ optical signal at M Gbps into an electrical signal, wherein M is more than 0;
1.2) the converted electric signal enters a clock data recovery unit 2, and M Gbps data and an M/2GHz clock signal are recovered by the clock data recovery unit 2;
1.3) the laser 3 emits continuous light to the Mach-Zehnder modulator 4, M Gbps data is re-modulated onto an optical carrier wave through the Mach-Zehnder modulator 4, is converted into an M Gbps optical signal, and sequentially enters the first optical delayer 5 and the first dual-output Mach-Zehnder modulator 6;
1.4) the M/2GHz clock signal recovered in the step 1.2) enters a first dual-output Mach-Zehnder modulator 6;
meanwhile, the first optical delayer 5 is controlled to align the phases of the M/2GHz clock signal and the M Gbps optical signal, and the first dual-output Mach-Zehnder modulator 6 selectively separates the odd-even channels of the M Gbps optical signal according to the input M/2GHz clock signal and outputs 2 paths of M/2Gbps optical signals with high isolation and low crosstalk;
step two, first judgment
Judging the data rate B of the output optical signal after the first speed reduction1Whether the maximum value A of the speed reduction output signal is less than or equal to the maximum value A of the speed reduction output signal; the maximum value A of the speed-reducing output signal is single-channel microwaveMaximum value of signal, typically Gbps;
if B is1If the speed of the high-speed optical signal is less than or equal to A, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
if B is1If the value is more than A, executing a third step;
wherein, B1＝M/2；
Step three, the second speed reduction of the high-speed optical signal
3.1) each path of M/2Gbps optical signal sequentially enters a second optical delayer 7 and a second double-output Mach-Zehnder modulator 8;
3.2) dividing the M/2GHz clock signal recovered in the step 1.2) by a frequency divider (13), changing the frequency into M/4GHz, and using the M/4GHz clock signal as a modulation signal of a second double-output Mach-Zehnder modulator (8);
meanwhile, the second optical delayer 7 is controlled to align the phases of the M/4GHz clock signal and the M/2Gbps optical signal, and the second dual-output Mach-Zehnder modulator 8 selects and separates the odd-even channel of the M/2Gbps optical signal according to the input M/4GHz clock signal and outputs 2 paths of M/4Gbps optical signals with high isolation and low crosstalk;
then, 2 paths of M/2Gbps optical signals are converted to output 4 paths of M/4Gbps optical signals;
step four, judging for the second time
Judging the data rate B of the output optical signal after the second speed reduction2Whether the maximum value A of the speed reduction output signal is less than or equal to the maximum value A of the speed reduction output signal;
if B is2If the speed of the high-speed optical signal is less than or equal to A, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
if B is2If the value is more than A, executing a fifth step;
wherein, B2＝M/4；
Step five, third speed reduction of the high-speed optical signal
5.1) each path of M/4Gbps optical signal sequentially enters a third optical delayer 9 and a third dual-output Mach-Zehnder modulator 10;
5.2) dividing the frequency of the M/4GHz clock signal subjected to the frequency reduction in the step 3.2) again by a frequency divider 13 to change the frequency into M/8GHz, and using the M/8GHz clock signal as a modulation signal of a third dual-output Mach-Zehnder modulator 10;
meanwhile, a third optical delayer 9 is controlled to align the phases of an M/8GHz clock signal and an M/4Gbps optical signal, and a third dual-output Mach-Zehnder modulator 10 selects and separates an odd-even channel of the M/4Gbps optical signal according to the input M/8GHz clock signal and outputs 2 paths of M/8Gbps optical signals with high isolation and low crosstalk;
then, the 4-path M/4Gbps optical signal is converted to output 8-path M/8Gbps optical signal;
sixth, third judgment
Judging the data rate B of the output optical signal after the third speed reduction3Whether the maximum value A of the speed reduction output signal is less than or equal to the maximum value A of the speed reduction output signal;
if B is3If the speed of the high-speed optical signal is less than or equal to A, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
if B is3If the speed is higher than A, continuing to perform optical signal speed reduction according to the method in the fifth step until the data rate of the output optical signal after speed reduction is less than or equal to the maximum value A of the speed-reduced output signal, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
step seven, signal output
2 after N decelerationsNWay M/2NThe Gbps RZ signal is photoelectrically converted into an electrical signal and enters the D trigger 12, wherein N is a positive integer greater than or equal to 1;
at the same time, an M/2 input is input to the D flip-flop 12NGHz clock signal, controlling the delay line to make the clock signal and M/2NGbps RZ signal phase alignment to complete RZ-NRZ conversion and output 2NWay M/2NGbps NRZ signal.
The conversion method can complete the serial-parallel conversion of the laser high-speed signals in the optical domain, the speed can reach hundreds of Gbps, and the conversion method has the advantages of flexible system, good expandability, high speed, large capacity, transparent protocol and the like. Therefore, the serial-parallel conversion method can better meet the requirement of high-speed large-capacity information transmission in the future. In addition, the serial-parallel conversion method of the invention is also applied to other aspects of high-speed optical signal processing.
Example one
Referring to fig. 1, taking the 10Gbps laser data speed reduction as an example:
(1) the 10Gbps high-speed NRZ optical signal is converted into an electric signal by the first photodetector 1 (PD);
(2) the converted electric signal enters a clock data recovery unit 2(CDR), and 10Gbps data and a 5GHz clock signal are recovered by the clock data recovery unit 2 (CDR);
(3) the laser 3 emits continuous light to the Mach-Zehnder modulator 4, 10Gbps data is remodulated on an optical carrier wave through the Mach-Zehnder modulator 4(MZM), and the data is converted into a 10Gbps optical signal which enters the first all-optical serial-parallel conversion unit;
(4) in the first all-optical serial-parallel conversion unit, the first dual-output Mach-Zehnder modulator 6 realizes the selective separation of odd and even channels, and aligns a 5GHz clock with a 10Gbps optical signal by controlling a first Optical Delayer (ODL) to obtain 2-path 5Gbps signals with high isolation and low crosstalk;
wherein, the clock signal is provided by a clock data recovery unit 2(CDR), and the 5GHz clock signal recovered by the clock data recovery unit 2 enters a first dual-output Mach-Zehnder modulator 6;
(5) the 2 paths of 5Gbps signals respectively pass through two second dual-output Mach-Zehnder modulators (8), and the 2.5GHz clock and the 5GHz clock are aligned with each other by controlling a second Optical Delayer (ODL), so that 4 paths of 2.5Gbps signals are converted and output;
(6) the 4-path 2.5Gbps signals respectively pass through four third dual-output Mach-Zehnder modulators 10, the 1.25GHz clock and the 2.5Gbps clock are aligned with the signals by controlling a third Optical Delayer (ODL), and 8-path 1.25Gbps RZ signals are converted and output, namely, the all-optical serial/parallel conversion of high-speed data is realized, so that the 1-path 10Gbps high-speed optical data is converted into 8-path 1.25Gbps parallel data, each path of channel can be accurately locked, and the serial-parallel conversion speed reduction processing is completed.
(7) The 8-path 1.25Gbps RZ signal is photoelectrically converted into an electric signal by the second photoelectric detector 11 and enters the D trigger 12, meanwhile, the D trigger 12 inputs a 1.25GHz clock, the delay line is controlled to align the clock data, the RZ-NRZ conversion is completed, and 8-path 1.25Gbps NRZ signal is output.
Through the steps, the speed of the 10Gbps laser data can be reduced to 8-channel 1.25Gbps microwave data, and the speed reduction microwave transmission of the data is realized.
Example two
The difference from the first embodiment is that, referring to fig. 2, step 1.3): the 10Gbps data is remodulated on an optical carrier by a Mach-Zehnder modulator 4(MZM), and is converted into a 10Gbps optical signal which firstly enters an amplifier 14 for amplification and then enters a first all-optical serial-parallel conversion unit; amplifier 14 may be an erbium doped fiber amplifier.
The above description is only for the purpose of describing the preferred embodiments of the present invention and does not limit the technical solutions of the present invention, and any known modifications made by those skilled in the art based on the main technical concepts of the present invention fall within the technical scope of the present invention.

Claims (5)

1. A high-speed laser-microwave link serial-parallel conversion method is characterized by comprising the following steps:
step one, the first speed reduction of the high-speed optical signal
1.1) photoelectrically converting a high-speed NRZ optical signal at M Gbps into an electrical signal, wherein M is more than 0;
1.2) the converted electric signal enters a clock data recovery unit (2), and M Gbps data and an M/2GHz clock signal are recovered by the clock data recovery unit (2);
1.3) the laser (3) transmits continuous laser signals to the Mach-Zehnder modulator (4), M Gbps data are re-modulated onto an optical carrier through the Mach-Zehnder modulator (4) and are converted into M Gbps optical signals, and the M Gbps optical signals sequentially enter the first optical delayer (5) and the first dual-output Mach-Zehnder modulator (6);
1.4) taking the M/2GHz clock signal recovered in the step 1.2) as a modulation signal of a first dual-output Mach-Zehnder modulator (6);
meanwhile, a first optical delayer (5) is controlled to align the phases of an M/2GHz clock signal and an M Gbps optical signal, and a first dual-output Mach-Zehnder modulator (6) selects and separates the odd-even channel of the M Gbps optical signal according to the input M/2GHz clock signal and outputs 2 paths of M/2Gbps RZ optical signals with high isolation and low crosstalk;
step two, first judgment
Judging the number of output optical signals after the first speed reductionData rate B1Whether the maximum value A of the speed reduction output signal is less than or equal to the maximum value A of the speed reduction output signal;
if B is1If the speed of the high-speed optical signal is less than or equal to A, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
if B is1If the value is more than A, executing a third step;
wherein, B1＝M/2；
Step three, the second speed reduction of the high-speed optical signal
3.1) each path of M/2Gbps RZ optical signal enters a second optical delayer (7) and a second double-output Mach-Zehnder modulator (8) in sequence;
3.2) dividing the M/2GHz clock signal recovered in the step 1.2) by a frequency divider (13), changing the frequency into M/4GHz, and using the M/4GHz clock signal as a modulation signal of a second double-output Mach-Zehnder modulator (8);
meanwhile, a second optical delayer (7) is controlled to align the phases of an M/4GHz clock signal and an M/2Gbps RZ optical signal, and a second double-output Mach-Zehnder modulator (8) separates the selection of the odd-even channel of the M/2Gbps RZ optical signal according to the input M/4GHz clock signal and outputs 2 paths of M/4Gbps RZ optical signals with high isolation and low crosstalk;
then, 2 paths of M/2Gbps RZ optical signals are converted to output 4 paths of M/4Gbps RZ optical signals;
step four, judging for the second time
Judging the data rate B of the output optical signal after the second speed reduction2Whether the maximum value A of the speed reduction output signal is less than or equal to the maximum value A of the speed reduction output signal;
if B is2If the speed of the high-speed optical signal is less than or equal to A, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
if B is2If the value is more than A, executing a fifth step;
wherein, B2＝M/4；
Step five, third speed reduction of the high-speed optical signal
5.1) each path of M/4Gbps RZ optical signal enters a third optical delayer (9) and a third dual-output Mach-Zehnder modulator (10) in sequence;
5.2) dividing the frequency of the M/4GHz clock signal subjected to the frequency reduction in the step 3.2) again by a frequency divider (13), changing the frequency into M/8GHz and using the M/8GHz clock signal as a modulation signal of a third double-output Mach-Zehnder modulator (10);
meanwhile, a third optical delayer (9) is controlled to align the phases of an M/8GHz clock signal and an M/4Gbps RZ optical signal, and a third dual-output Mach-Zehnder modulator (10) separates the selection of an odd-even channel of the M/4Gbps RZ optical signal according to the input M/8GHz clock signal and outputs 2 paths of M/8Gbps RZ optical signals with high isolation and low crosstalk;
then, the 4 paths of M/4Gbps RZ optical signals are converted to output 8 paths of M/8Gbps RZ optical signals;
sixth, third judgment
Judging the data rate B of the output optical signal after the third speed reduction3Whether the maximum value A of the speed reduction output signal is less than or equal to the maximum value A of the speed reduction output signal;
if B is3If the speed of the high-speed optical signal is less than or equal to A, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
if B is3If the speed is higher than A, continuing to perform optical signal speed reduction according to the method in the fifth step until the data rate of the output optical signal after speed reduction is less than or equal to the maximum value A of the speed-reduced output signal, finishing the speed reduction of the high-speed optical signal, and executing a seventh step;
step seven, signal output
2 after N decelerationsNWay M/2NThe Gbps RZ signal is photoelectrically converted into an electric signal and then enters a D trigger (12), wherein N is a positive integer greater than or equal to 1;
at the same time, an M/2 input is input to the D flip-flop (12)NGHz clock signal, the clock signal and M/2NThe phase of Gbps RZ signal is aligned to complete the RZ-NRZ conversion of optical signal and output 2NWay M/2NGbps NRZ signal.
2. The high-speed laser-microwave link serial-to-parallel conversion method according to claim 1, characterized in that: the maximum value A of the speed reduction output signal is the maximum value of the single-channel microwave signal.
3. The high-speed laser-microwave link serial-parallel conversion method according to claim 1 or 2, characterized in that: in the step 1.3), the converted optical signals enter an amplifier (14) for amplification and then enter a first optical delayer (5).
4. The high-speed laser-microwave link serial-to-parallel conversion method according to claim 3, characterized in that: the amplifier (14) is an erbium-doped fiber amplifier.
5. The high-speed laser-microwave link serial-to-parallel conversion method according to claim 1, characterized in that: in the step 1.1), the high-speed NRZ optical signal of M Gbps is converted into an electric signal through a first photoelectric detector (1);
in step seven, 2 after N times of speed reductionNWay M/2NThe Gbps RZ signal is converted into an electric signal by the second photoelectric detector (11) and then enters the D trigger (12).
CN201911348846.3A 2019-12-24 2019-12-24 High-speed laser-microwave link serial-parallel conversion method Active CN111064474B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911348846.3A CN111064474B (en) 2019-12-24 2019-12-24 High-speed laser-microwave link serial-parallel conversion method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911348846.3A CN111064474B (en) 2019-12-24 2019-12-24 High-speed laser-microwave link serial-parallel conversion method

Publications (2)

Publication Number Publication Date
CN111064474A CN111064474A (en) 2020-04-24
CN111064474B true CN111064474B (en) 2021-06-22

Family

ID=70303181

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911348846.3A Active CN111064474B (en) 2019-12-24 2019-12-24 High-speed laser-microwave link serial-parallel conversion method

Country Status (1)

Country Link
CN (1) CN111064474B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105933065A (en) * 2016-04-08 2016-09-07 上海交通大学 Optical carrier suppression-based optical fiber distribution system and method of photo-produced microwave signals
US9905999B2 (en) * 2015-02-26 2018-02-27 California Institute Of Technology Optical frequency divider based on an electro-optical-modulator frequency comb
CN109818898A (en) * 2019-02-27 2019-05-28 广东科学技术职业学院 Send terminal, optical-fiber wireless multi-carrier communications systems and its signal processing method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9905999B2 (en) * 2015-02-26 2018-02-27 California Institute Of Technology Optical frequency divider based on an electro-optical-modulator frequency comb
CN105933065A (en) * 2016-04-08 2016-09-07 上海交通大学 Optical carrier suppression-based optical fiber distribution system and method of photo-produced microwave signals
CN109818898A (en) * 2019-02-27 2019-05-28 广东科学技术职业学院 Send terminal, optical-fiber wireless multi-carrier communications systems and its signal processing method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Performance Comparison of All-Optical Amplify-and-Forward Relaying FSO Communication Systems With OOK and DPSK Modulations;Xinning Huang ,etc;《IEEE Photonics Journal》;20180831;正文第1-12页 *
空间激光通信最新进展与发展趋势;高铎瑞 等;《中国光学》;20181231;第901-913页 *

Also Published As

Publication number Publication date
CN111064474A (en) 2020-04-24

Similar Documents

Publication Publication Date Title
JP2777194B2 (en) Optical transmission system
CN103051385A (en) Integral wired-wireless optical fiber asymmetric full-duplex access method and system
EP2723001B1 (en) High capacity satellite telecommunication system with multibeam coverage and frequency reusing.
CN104301811A (en) Coherent passive optical network system and signal transmitting and receiving method
CN106304420B (en) Wireless forward transmission system for 5G power multiplexing-oriented analog optical transmission
CN110266387B (en) Multi-band optical carrier radio frequency system and method based on weak mode group coupling and probability shaping
EP3868039B1 (en) Communication system for radio transmission
CN102136877A (en) 60GHz millimeter wave based broadband access (BBA) system and method in high-speed rails
EP3641163A1 (en) Optical module and network device
CN112152849B (en) Base station based on intelligent all-optical processing and implementation method thereof
CN111064474B (en) High-speed laser-microwave link serial-parallel conversion method
Harada et al. TDM intercell connection fiber-optic bus link for personal radio communication systems
CN115037378B (en) Optical interconnection method and system based on optical honeycomb
Wonglumsom et al. HORNET-a packet-switched WDM network: Optical packet transmission and recovery
CN101951311B (en) Sudden clock recovery method for dynamic optimal regulation at receiver in passive optical network
Sabella et al. Trends in optical transport networks and related technologies
Du et al. A resource sharing C-RAN architecture with wavelength selective switching and parallel uplink signal detection
CN105120377B (en) Wireless forward pass Transmission system and method based on wavelength-selective switches
Tomizawa et al. Recent advances in 100G OTN
CN113542177B (en) Method and system for solving frequency offset aliasing of pulse amplitude modulation signal
CN110768717B (en) Free space optical communication system
CN112839268B (en) Simplified coherence based optical fiber access network transmission system and method
CN113676282B (en) Multi-user resonance optical communication system and method based on frequency division multiple access
Luís et al. Hybrid optical packet and circuit switching in spatial division multiplexing fiber networks
Wu et al. Research and System Implementation of Flexible Spectrum Allocation for Hybrid Satellite Network of Laser and Microwave Based on OFC

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant