CN208539908U - Underwater anti-turbulence high-speed optical soliton communication system - Google Patents
Underwater anti-turbulence high-speed optical soliton communication system Download PDFInfo
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- CN208539908U CN208539908U CN201820697903.3U CN201820697903U CN208539908U CN 208539908 U CN208539908 U CN 208539908U CN 201820697903 U CN201820697903 U CN 201820697903U CN 208539908 U CN208539908 U CN 208539908U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 71
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Abstract
水下抗湍流高速光孤子通信系统，属于无线通信技术领域，为解决现有的水下激光通信系统存在的通信距离短、抗海洋湍流效应差、难以达到长距离高速率通信的问题，该系统为数据源通过电缆连接孤子激光器，孤子激光器输出端与光纤放大器一、ASE滤波器、光纤放大器二依次为光纤连接，光纤放大器二的输出端光纤端面位于准直透镜的焦点处，LBO倍频晶体与准直透镜、光学发射天线同轴准直放置；光学接收天线与光学发射天线同轴对准，海水池位于光学发射天线和光学接收天线之间；会聚透镜与光学接收天线同轴准直放置，光电探测器位于会聚透镜焦点处；光电探测器、滤波器和解调器依次电缆连接；该系统在海水信道高速长距离通信领域具有广泛的应用前景。
The underwater anti-turbulence high-speed optical soliton communication system belongs to the field of wireless communication technology. In order to solve the problems of short communication distance, poor anti-ocean turbulence effect, and difficulty in achieving long-distance high-speed communication in the existing underwater laser communication system, the system The data source is connected to the soliton laser through a cable. The output end of the soliton laser is connected to the fiber amplifier 1, the ASE filter, and the fiber amplifier 2 in turn. The fiber end face of the output end of the fiber amplifier 2 is located at the focus of the collimating lens. The LBO frequency-doubling crystal It is coaxially collimated with the collimating lens and the optical transmitting antenna; the optical receiving antenna is coaxially aligned with the optical transmitting antenna, and the seawater pool is located between the optical transmitting antenna and the optical receiving antenna; the converging lens and the optical receiving antenna are coaxially collimated and placed , the photodetector is located at the focal point of the converging lens; the photodetector, the filter and the demodulator are connected by cables in sequence; the system has wide application prospects in the field of high-speed and long-distance communication in seawater channels.
Description
Technical field
The utility model belongs to wireless communication technology field, and in particular to the underwater high-speed based on soliton noiseproof feature
Long range wireless communication system.
Background technique
Underwater wireless communication (UWOC) refers to by using wireless carrier i.e. radio wave, sound wave and light wave in no guiding
Data are transmitted in water environment, compared with radio communication and underwater sound communication, UWOC has higher transmission bandwidth, to provide more
High data rate.Due to this high-speed transfer advantage, UWOC causes comparable concern in recent years, and wavelength is arrived in 400nm
Light wave between 580nm decay in the seawater it is smaller, referred to as " blue-green window ", mostly used greatly in UWOC system at present it is bluish-green swash
Light device is directly modulated, and signal uses rectangle and Gaussian shape pulses more, and many experiments show that such system can not meet long range
Communicating requirement, when existing underwater laser communication rate meets Gbps magnitude, communication distance is in tens meters of ranges.It is keeping thus
Farther communication distance is pursued while high-speed communication is inevitable trend.
Document: Liu, Xiaoyan, et al. " 34.5m Underwater optical wireless
communication with 2.70Gbps data rate based on a green laser with NRZ-OOK
modulation."Solid State Lighting:International Forum on Wide Bandgap
Semiconductors China(SSLChina:IFWS),2017 14th China International Forum
On.IEEE, 2017., structure is as shown in Figure 1, specific structure is that Network Analyzer 1 generates clock signal driving pulse generator
2 obtain pseudo-random sequence injection bias device 3, and bias device 3 passes through 4 regulation direct-current bias of DC source.Pseudo-random sequence is by inclined
It holds device control 520nm laser 5 and generates modulated optical signal.Optical signal by diversing lens group 6 collimation transmitting after, using
Pond is simultaneously converged on the target surface of APD photodetector 9 by the reception of receiving lens group 8.By obtaining telecommunications after photoelectric conversion
Error Detector 10 and oscillometric signal device 11 number are injected together with the clock signal that pulse generator 2 generates carries out the bit error rate and waveform
Measurement.The method that the system utilizes 520nm laser directly to modulate, and modulated using NRZ-OOK, it is remote to realize high-speed
Laser communication.But the rate of the device is limited by reactance modulation system, and traffic rate improves relatively difficult again.Used
The problems such as modulation format is easy to appear deformation in oceanic turbulence, close there are data transmission distance, can not adapt to high-speed long distance
Development from fields such as communications.
Utility model content
The utility model short, anti-oceanic turbulence effect for communication distance existing for the existing underwater laser communication system of solution
Difference is difficult to the problem of reaching long range high rate communication, proposes a kind of underwater anti-turbulent flow based on 1064nm soliton laser
High-speed optical soliton communication system
Technical solutions of the utility model are as follows:
Underwater anti-turbulent flow high-speed optical soliton communication system, characterized in that it includes that data source, soliton laser, optical fiber are put
Big device one, ASE filter, fiber amplifier two, collimation lens, LBO frequency-doubling crystal, optical transmitting antenna, seawater pond, optics connect
Receive antenna, convergent lens, photodetector, filter and demodulator；
Data source is filtered by cable connection soliton laser, soliton laser output end and fiber amplifier one, ASE
Device, fiber amplifier two are followed successively by optical fiber connection, and the output end fiber end face of fiber amplifier two is located at the focus of collimation lens
Place, LBO frequency-doubling crystal and collimation lens, optical transmitting antenna coaxially collimate placement；Optical receiver antenna and optical transmitting antenna
Coaxial alignment, seawater pond is between optical transmitting antenna and optical receiver antenna；Convergent lens is coaxial with optical receiver antenna
Collimation is placed, and photodetector is located at convergent lens focal point；Photodetector, filter and demodulator successively cable connection.
After optical transmitting antenna and optical receiver antenna alignment, data source injects soliton laser and generates modulated optical signal,
It enters fiber amplifier one through optical fiber to amplify, by fiber amplifier two after amplified optical signals ASE filter denoising
It is further amplified；Amplified signal enters LBO frequency-doubling crystal by collimating mirror collimation again and obtains the 532nm communication with modulated signal
Light；Communication ray by optical transmitting antenna emit and by the seawater pond containing oceanic turbulence after, received by optical receiver antenna, receive
To Communication ray enter photodetector by convergent lens and be converted to electric signal, after obtained electric signal is by filter process,
Communication data is demodulated by demodulator again, so as to complete underwater laser communication.
The soliton laser is that wavelength is 1064nm laser, can produce the soliton pulses sequence of high repetition frequency
Column.
The fiber amplifier one is the small signal optical fibre amplifier for adulterating Yb, for amplifying small and weak light modulating signal.
The ASE filter is used to filter off the noise of soliton laser and fiber amplifier introduces ASE noise.
The fiber amplifier is second is that adulterate the power fiber amplifier of Yb, for amplifying the power of Communication ray.
The optical transmitting antenna and optical receiver antenna plate 532nm highly reflecting films, the reception for 532nm Communication ray
And transmitting.
The beneficial effects of the utility model are: 1) the high traffic rate of high power: compared to directly adjusting 532nm laser,
1064nm laser high traffic rate (Gbps) easy to accomplish, while transmission power can be increased using doping Yb fiber amplifier
It is advantageously implemented telecommunication, while frequency-doubling crystal is added in structure before convergent lens, Used for Soliton Generation is issued close red
Outer Communication ray is changed into blue green light 532nm, reduces seawater due to scattering and absorbing the loss to Communication ray, is advantageously implemented remote
Distance communication.2) anti-turbulent flow ability is strong: compared to traditional communication, the shadow of oceanic turbulence is highly resistant to using optical soliton communication
It rings, communication distance can be improved.
Anti- turbulent flow high-speed optical soliton communication system has the utility model in seawater channel high speed long haul communication field under water
Have wide practical use.
Detailed description of the invention
Fig. 1 has the remote underwater laser communication system schematic of high-speed to be existing.
Fig. 2 is the utility model anti-turbulent flow high-speed optical soliton communication system schematic diagram under water.
Fig. 3 is the soliton that duty ratio is 0.5 and 1, Gauss, rectangular pulse when the weak turbulent flow in ocean is using IM-OOK modulation
Bit error rate comparison diagram.
Specific embodiment
It elaborates with reference to the accompanying drawing to the utility model.
As shown in Fig. 2, underwater anti-turbulent flow high-speed optical soliton communication system comprising data source 12, soliton laser 13, light
Fiber amplifier 1, ASE filter 15, fiber amplifier 2 16, collimation lens 17, LBO frequency-doubling crystal 18, optical transmitting antenna
19, seawater pond 20, optical receiver antenna 21, convergent lens 22, photodetector 23, filter 24 and demodulator 25.
Data source 12 by cable connection soliton laser 13,13 output end of soliton laser and fiber amplifier 1,
ASE filter 15, fiber amplifier 2 16 are followed successively by optical fiber connection, and 2 16 output end fiber end face of fiber amplifier is located at collimation
The focal point of lens 17, LBO frequency-doubling crystal 18 are placed with collimation lens 17, the coaxial collimation of optical transmitting antenna 19.Optics receives
Antenna 21 and 19 coaxial alignment of optical transmitting antenna, seawater pond 20 be located at optical transmitting antenna 19 and optical receiver antenna 21 it
Between.Convergent lens 22 is placed with the coaxial collimation of optical receiver antenna 21, and photodetector 23 is located at 22 focal point of convergent lens.Light
Successively cable connection, the output of demodulator 25 are the data of demodulation for electric explorer 23, filter 24 and demodulator 25.
After optical transmitting antenna 19 and optical receiver antenna 21 are aligned, data source 12 injects soliton laser 13 and generates modulation
Optical signal enters fiber amplifier 1 through optical fiber and amplifies, by light after amplified 15 denoising of optical signals ASE filter
Fiber amplifier 2 16 is further amplified.Amplified signal passes through the collimation of collimating mirror 17 again and enters the acquisition band tune of LBO frequency-doubling crystal 18
The 532nm Communication ray of signal processed.Communication ray emitted by optical transmitting antenna 19 and by the seawater pond 20 containing oceanic turbulence after, by
Optical receiver antenna 21 receives, and the Communication ray received is converted to electric signal into photodetector 23 by convergent lens 22,
After obtained electric signal is handled by filter 24, then communication data demodulated by demodulator 25, so as to complete underwater laser
Communication.
The soliton laser 13 is that wavelength is 1064nm laser, can produce the soliton pulses sequence of high repetition frequency
Column.
The fiber amplifier 1 is the small signal optical fibre amplifier for adulterating Yb, for amplifying small and weak light modulation letter
Number.
The ASE filter 15 is used to filter off the noise of laser and fiber amplifier 14 introduces ASE noise.
The fiber amplifier 2 16 is the power fiber amplifier for adulterating Yb, for amplifying the power of Communication ray.
The advantages that matching efficiency with higher of LBO (three lithium borates) frequency-doubling crystal 18 and laser damage threshold,
In the range of being " blue-green window " for 1064nm laser freuqency doubling to 532nm.
The optical transmitting antenna 19 and optical receiver antenna 21 is used for the reception and transmitting of 532nm Communication ray, plating
532nm highly reflecting films.
The demodulator 25 is used for signaling protein14-3-3 and regeneration.
If Fig. 3 is that the bit error rate of soliton shape, gaussian-shape, rectangular pulse communication at different signal-to-noise ratio (SNR) changes song
Line.As seen from the figure, in SNR=-10dB, the pulse of soliton shape 3-4 smaller than traditional gaussian-shape and pulse rectangular pulse
The order of magnitude, therefore Fig. 3 illustrates that soliton has more the performance of anti-turbulent flow interference than traditional communication, and it is logical to can be carried out more remote laser
Letter.
The submarine optical communication device of the available high speed long range of the utility model, with the continuous hair of various photoelectric devices
Exhibition, it will obtain more remote high speed communication apparatus, and its application also will more extensively.
Claims (7)
1. underwater anti-turbulent flow high-speed optical soliton communication system, characterized in that it include data source (12), soliton laser (13),
Fiber amplifier one (14), ASE filter (15), fiber amplifier two (16), collimation lens (17), LBO frequency-doubling crystal (18),
Optical transmitting antenna (19), seawater pond (20), optical receiver antenna (21), convergent lens (22), photodetector (23), filtering
Device (24) and demodulator (25)；
Data source (12) passes through cable connection soliton laser (13), soliton laser (13) output end and fiber amplifier one
(14), ASE filter (15), fiber amplifier two (16) are followed successively by optical fiber connection, fiber amplifier two (16) output end optical fiber
End face is located at the focal point of collimation lens (17), and LBO frequency-doubling crystal (18) and collimation lens (17), optical transmitting antenna (19) are together
Axis collimation is placed；Optical receiver antenna (21) and optical transmitting antenna (19) coaxial alignment, seawater pond (20) are located at optical emitting
Between antenna (19) and optical receiver antenna (21)；Convergent lens (22) is placed with the coaxial collimation of optical receiver antenna (21), light
Electric explorer (23) is located at convergent lens (22) focal point；Photodetector (23), filter (24) and demodulator (25) are successively
Cable connection.
2. underwater anti-turbulent flow high-speed optical soliton communication system according to claim 1, which is characterized in that optical transmitting antenna
(19) and after optical receiver antenna (21) alignment, data source (12) injects soliton laser (13) and generates modulated optical signal, through light
Fibre enters fiber amplifier one (14) and amplifies, by fiber amplifier after amplified optical signals ASE filter (15) denoising
Device two (16) is further amplified；Amplified signal passes through collimation lens (17) collimation again and enters LBO frequency-doubling crystal (18) acquisition band
The 532nm Communication ray of modulated signal；Communication ray is emitted by optical transmitting antenna (19) and passes through the seawater pond containing oceanic turbulence
(20) it after, is received by optical receiver antenna (21), the Communication ray received enters photodetector by convergent lens (22)
(23) electric signal is converted to, after obtained electric signal is handled by filter (24), then communication data is demodulated by demodulator (25),
So as to complete underwater laser communication.
3. underwater anti-turbulent flow high-speed optical soliton communication system according to claim 1, which is characterized in that the orphan swashs
Light device (13) is that wavelength is 1064nm laser, can produce the soliton pulses sequence of high repetition frequency.
4. underwater anti-turbulent flow high-speed optical soliton communication system according to claim 1, which is characterized in that the optical fiber is put
Big device one (14) is the small signal optical fibre amplifier for adulterating Yb, for amplifying small and weak light modulating signal.
5. underwater anti-turbulent flow high-speed optical soliton communication system according to claim 1, which is characterized in that the ASE filter
Wave device (15) is used to filter off the noise of soliton laser (13) and fiber amplifier one (14) introduces ASE noise.
6. underwater anti-turbulent flow high-speed optical soliton communication system according to claim 1, which is characterized in that the optical fiber is put
Big device two (16) is the power fiber amplifier for adulterating Yb, for amplifying the power of Communication ray.
7. underwater anti-turbulent flow high-speed optical soliton communication system according to claim 1, which is characterized in that the optics hair
Penetrate antenna (19) and optical receiver antenna (21) plating 532nm highly reflecting films, reception and transmitting for 532nm Communication ray.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820697903.3U CN208539908U (en) | 2018-05-10 | 2018-05-10 | Underwater anti-turbulence high-speed optical soliton communication system |
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| CN201820697903.3U CN208539908U (en) | 2018-05-10 | 2018-05-10 | Underwater anti-turbulence high-speed optical soliton communication system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418637A (en) * | 2018-05-10 | 2018-08-17 | 长春理工大学 | Underwater anti-turbulent high-speed optical soliton communication system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418637A (en) * | 2018-05-10 | 2018-08-17 | 长春理工大学 | Underwater anti-turbulent high-speed optical soliton communication system |
| CN108418637B (en) * | 2018-05-10 | 2024-05-07 | 长春理工大学 | Underwater turbulence-resistant high-speed optical soliton communication system |
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Granted publication date: 20190222 |