CN107682044A - Laser and microwave hybrid transmission system - Google Patents
Laser and microwave hybrid transmission system Download PDFInfo
- Publication number
- CN107682044A CN107682044A CN201710906472.7A CN201710906472A CN107682044A CN 107682044 A CN107682044 A CN 107682044A CN 201710906472 A CN201710906472 A CN 201710906472A CN 107682044 A CN107682044 A CN 107682044A
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- microwave
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- coupler
- ports
- tunable
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optical Communication System (AREA)
Abstract
Laser and Microwave Hybrid Transmission system, belong to communication technical field, in view of the shortcomings of the prior art, first semiconductor laser with tunable is connected with the second three-dB coupler d ports, and the second three-dB coupler f ports are sequentially connected with the first photodetector, high-pass filter, the second microwave amplifier and microwave transmitting antenna；AWG, the first microwave amplifier, intensity modulator are sequentially connected；Second semiconductor laser with tunable is connected with intensity modulator, and intensity modulator is connected with the first three-dB coupler a ports；First three-dB coupler b ports are connected with the second three-dB coupler e ports；First three-dB coupler c ports are sequentially connected with image intensifer and laser transmitting antenna；Microwave transmitting antenna receiving and transmitting signal corresponding with microwave antenna, microwave antenna are connected with wave detector；Laser transmitting antenna receiving and transmitting signal corresponding with light receiver aerial, light receiver aerial and the second photodetector are connected.
Description
Technical field
The present invention relates to a kind of laser and Microwave Hybrid Transmission system, belong to communication technical field；The present invention can apply
In numerous areas such as Internet of Things, mobile communication, satellite communications.
Background technology
In order to meet the satellite communication system in future, it is very necessary to develop laser and Microwave Hybrid transmission.In space
In communication system, the channel between satellite and satellite is almost vacuum, and laser can be made full use of to realize thousands of or even tens thousand of public affairs
In communication distance.And between satellite and ground, the channel of laser communication passes through atmosphere, the climate change of atmosphere and deposits
Atmospheric turbulance light can be produced and absorb and scattering, cause the states such as intensity, frequency, phase and the polarization of light that random become occurs
Change.These changes can make the capture of the signal based on laser communication system, tracking become abnormal difficult, or even can make communication system
Failure.And the performance of microwave communication influenceed by turbulent flow it is relatively small, in order to effectively ensure between satellite and satellite and defend
Efficient, lasting communication between star and ground.By the natural complementarity of laser communication and microwave communication, following satellite leads to
Letter system should be able to abundant United microwave and the characteristics of laser communication technology, the transmission mode coexisted using laser and microwave, mixed.
Laser and Microwave Hybrid communication system as one kind can effectively solve the problem that in wireless communication procedure because of bad weather and caused by be
The solution for the problems such as bit error rate of uniting rises, availability reduces.Two kinds of communication modes are complementary to one another, can be according to receiving terminal
Bit error rate size or snr value size are received to select communication link, communication system can be made to face evil in this way
Still there is high availability and reliability during bad weather.Laser communication can provide the communication service of high-speed, and microwave communication
The traffic rate of offer is relatively low.Therefore, laser communication link can be used in actual use as principal communication link,
And backup link of the microwave communications link as laser communication link, in principal communication link can not ensure primary demand or communication
Backup link is enabled when disconnected.So as to ensure the reliability of communication link.Laser and Microwave Hybrid communication system have at home and abroad been got over
To be more taken seriously, the system meet user to wireless communication system at a high speed, safe and stable, reliable requirement, in Internet of Things
The numerous areas such as net, mobile communication, satellite communication have huge application prospect.
The content of the invention
The present invention is for existing laser and Microwave Hybrid Transmission system need to be based respectively on laser communication system and microwave leads to
Letter system could carry out the deficiency of information transmit-receive, realized and swashed based on two semiconductor laser with tunable the invention provides one kind
The mixed transport of light and microwave.
The present invention adopts the following technical scheme that：
Laser and Microwave Hybrid Transmission system, it is characterized in that, it includes the first semiconductor laser with tunable, second adjustable
Humorous semiconductor laser, AWG, the first microwave amplifier, intensity modulator, the first three-dB coupler, the 2nd 3dB
Coupler, the first photodetector, image intensifer, high-pass filter, laser transmitting antenna, the second microwave amplifier, microwave hair
Penetrate antenna, microwave antenna, light receiver aerial, wave detector and the second photodetector；First semiconductor laser with tunable
It is connected with the d ports of the second three-dB coupler, the f ports of the second three-dB coupler and the first photodetector, high-pass filter, the
Two microwave amplifiers and microwave transmitting antenna are sequentially connected；AWG, the first microwave amplifier, intensity modulator according to
It is secondary to be connected；Second semiconductor laser with tunable is connected with intensity modulator, a ends of intensity modulator and the first three-dB coupler
Mouth is connected；The b ports of first three-dB coupler are connected with the e ports of the second three-dB coupler；The c ports of first three-dB coupler with
Image intensifer and laser transmitting antenna are sequentially connected；Microwave transmitting antenna receiving and transmitting signal corresponding with microwave antenna, microwave
Reception antenna is connected with wave detector, and oscillograph is connected with wave detector, for observing；Laser transmitting antenna is relative with light receiver aerial
Receiving and transmitting signal is answered, light receiver aerial and the second photodetector are connected, and the second oscillograph is connected with the second photodetector, is used for
Observation.
The beneficial effects of the invention are as follows：The system realizes the mixed of laser and microwave based on two semiconductor laser with tunable
Transmission is closed, it can be realized in same system launches while laser signal and microwave signal.Solve in this way logical
The possibility of letter system communication disruption when facing bad weather, add the reliability of communication system.Based on laser signal and
The mixed transport of microwave signal can increase the advantage of system reliability, and laser of the present invention and Microwave Hybrid Transmission system are in Internet of Things
The numerous areas such as net, mobile communication, satellite communication are with a wide range of applications.
In addition, the present invention is simple in construction, its low, stable performance of loss, it is easy to integrate with fibre system.
Brief description of the drawings
Fig. 1 is laser and Microwave Hybrid Transmission system structural representation.
Fig. 2 be laser signal as carrier wave when demodulate 10Gbps pseudo-random digital signal eye pattern.
Fig. 3 be laser signal as carrier wave when demodulate 10Gbps sinusoidal analog signal waveforms.
Fig. 4 be microwave signal as carrier wave when demodulate 200Mbps pseudo-random digital signal eye pattern.
Fig. 5 be microwave signal as carrier wave when demodulate 800Mbps sinusoidal analog signal waveforms.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
Referring to Fig. 1, laser and Microwave Hybrid Transmission system, it is adjustable that it includes the first semiconductor laser with tunable 1, second
Humorous semiconductor laser 2, AWG 3, the first microwave amplifier 4, intensity modulator 5, the first three-dB coupler 6,
Two three-dB couplers 7, the first photodetector 8, image intensifer 9, high-pass filter 10, laser transmitting antenna 11, the second microwave are put
Big device 12, microwave transmitting antenna 13, microwave antenna 14, light receiver aerial 15, the photodetector 17 of wave detector 16 and second.
First semiconductor laser with tunable 1 is connected with the d ports of the second three-dB coupler 7, the f ports of the second three-dB coupler 7 and the
One photodetector 8, high-pass filter 10, the second microwave amplifier 12 and microwave transmitting antenna 13 are sequentially connected.Random waveform
Generator 3, the first microwave amplifier 4, intensity modulator 5 are sequentially connected.Second semiconductor laser with tunable 2 and intensity modulated
Device 5 is connected, and intensity modulator 5 is connected with a ports of the first three-dB coupler 6.The b ports of first three-dB coupler 6 and the 2nd 3dB
The e ports of coupler 7 are connected.The c ports of first three-dB coupler 6 are sequentially connected with image intensifer 9 and laser transmitting antenna 11.
Microwave transmitting antenna 13 is connected with wave detector 16, shown with 14 corresponding receiving and transmitting signal of microwave antenna, microwave antenna 14
Ripple device 18 is connected with wave detector 16, for observing.Laser transmitting antenna 11 connects with 15 corresponding receiving and transmitting signal of light receiver aerial, light
Receive antenna 15 with the second photodetector 17 to be connected, the second oscillograph 19 is connected with the second photodetector 17, for observing.
The launch wavelength of the launch wavelength of first semiconductor laser with tunable 1 and the second semiconductor laser with tunable 2
With wavelength difference.
AWG 3 is used for the pseudo-random digital signal and sinusoidal analog signal pulse ripple for producing different rates
Shape.
High-pass filter 10 is used to filter out low frequency component.
The launch wavelength for adjusting the first semiconductor laser with tunable 1 is 1550nm, and the second tunable semiconductor of regulation swashs
The launch wavelength of light device 2 is 1550.08nm.AWG 3 send signal amplify by the first microwave amplifier 4 it is laggard
Intensity modulator 5 is removed, the laser that the second semiconductor laser with tunable 2 is sent becomes after intensity modulator 5 with loading
The laser signal of modulation intelligence, the laser signal with load-modulate information enter a ports of the first three-dB coupler 6,50% band
The laser signal for having load-modulate information enters after image intensifer 9 amplifies by laser from the output of the c ports of the first three-dB coupler 6
Transmitting antenna 11 is launched.
Laser signal of other 50% with load-modulate information enters the from the output of the b ports of the first three-dB coupler 6
The e ports of two three-dB couplers 7, d of the laser signal that the first semiconductor laser with tunable 1 is sent from the second three-dB coupler 7
Port entrance, two beam laser signals couple to produce to carry into the first photodetector 8 jointly in the second three-dB coupler 7 to be added
The high-frequency microwave signal of modulation intelligence is carried, the high-frequency microwave signal with load-modulate information filters out low by high-pass filter 10
Launched after frequency component after the amplification of the second microwave amplifier 12 by microwave transmitting antenna 13.
The high-frequency microwave signal for the load-modulate information that microwave transmitting antenna 13 is launched is received by microwave antenna 14, should
Signal enters the first oscillograph 18 and is used to observe after being demodulated by wave detector 16.What laser transmitting antenna 11 was launched believes with loading
The laser signal of breath is received by light receiver aerial 15, and the signal enters the second oscillograph after being demodulated by the second photodetector 17
19 are used to observe.
The present invention is a kind of mixed transport that laser and microwave are realized based on two semiconductor laser with tunable, works as use
When laser signal is as carrier wave, 10Gbps pseudo-random digital signal and 10Gbps sinusoidal analog signal can be transmitted, is demodulated
10Gbps pseudo-random digital signal eye pattern, as shown in Fig. 2 the bit error rate of the 10Gbps pseudo-random digital signals of system transmission
For 0.
As shown in figure 3, the system can transmit 10Gbps sinusoidal analog signal.
When using microwave signal as carrier wave, 200Mbps pseudo-random digital signal and 800Mbps sine can be transmitted
Analog signal, demodulate 200Mbps pseudo-random digital signal eye pattern, as shown in figure 4, the system transmission 200Mbps puppets with
The bit error rate of machine data signal is 0.
As shown in figure 5, the system can transmit 800Mbps sinusoidal analog signal.
The present embodiment obtains the mixed transport of laser signal and microwave signal in same structure, when using laser signal
10Gbps pseudo-random digital signal and sinusoidal analog signal can be transmitted when being transmitted as carrier wave, is believed when using high-frequency microwave
200Mbps pseudo-random signal and 800Mbps sinusoidal analog signal can be transmitted when number being transmitted as carrier wave.
Claims (4)
1. laser and Microwave Hybrid Transmission system, it is characterized in that, it includes the first semiconductor laser with tunable (1), second can
Tunable semiconductor laserses (2), AWG (3), the first microwave amplifier (4), intensity modulator (5), the first 3dB
Coupler (6), the second three-dB coupler (7), the first photodetector (8), image intensifer (9), high-pass filter (10), laser
Transmitting antenna (11), the second microwave amplifier (12), microwave transmitting antenna (13), microwave antenna (14), light receiver aerial
(15), wave detector (16) and the second photodetector (17)；
First semiconductor laser with tunable (1) is connected with the d ports of the second three-dB coupler (7), the second three-dB coupler (7)
F ports and the first photodetector (8), high-pass filter (10), the second microwave amplifier (12) and microwave transmitting antenna (13)
It is sequentially connected；
AWG (3), the first microwave amplifier (4), intensity modulator (5) are sequentially connected；
Second semiconductor laser with tunable (2) is connected with intensity modulator (5), intensity modulator (5) and the first three-dB coupler
(6) a ports are connected；
The b ports of first three-dB coupler (6) are connected with the e ports of the second three-dB coupler (7)；The c of first three-dB coupler (6)
Port is sequentially connected with image intensifer (9) and laser transmitting antenna (11)；
Microwave transmitting antenna (13) receiving and transmitting signal corresponding with microwave antenna (14), microwave antenna (14) and wave detector
(16) it is connected, oscillograph (18) is connected with wave detector (16)；
Laser transmitting antenna (11) receiving and transmitting signal corresponding with light receiver aerial (15), light receiver aerial (15) and the second photoelectricity are visited
Survey device (17) to be connected, the second oscillograph (19) is connected with the second photodetector (17).
2. laser according to claim 1 and Microwave Hybrid Transmission system, it is characterised in that described first tunable partly leads
The launch wavelength of body laser (1) and the launch wavelength of the second semiconductor laser with tunable (2) have wavelength difference.
3. laser according to claim 1 and Microwave Hybrid Transmission system, it is characterised in that the AWG
(3) it is used for the pseudo-random digital signal and sinusoidal analog signal pulse waveform for producing different rates.
4. laser according to claim 1 and Microwave Hybrid Transmission system, it is characterised in that the high-pass filter (10)
For filtering out low frequency component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906472.7A CN107682044B (en) | 2017-09-29 | 2017-09-29 | Laser and microwave mixed transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906472.7A CN107682044B (en) | 2017-09-29 | 2017-09-29 | Laser and microwave mixed transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107682044A true CN107682044A (en) | 2018-02-09 |
| CN107682044B CN107682044B (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710906472.7A Active CN107682044B (en) | 2017-09-29 | 2017-09-29 | Laser and microwave mixed transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109889264A (en) * | 2019-01-30 | 2019-06-14 | 中国科学院半导体研究所 | From space optical communication transmitting terminal, receiving end, the system and method for locking autotracking |
| CN112564783A (en) * | 2020-11-04 | 2021-03-26 | 北京遥测技术研究所 | Resource-saving laser radio frequency integrated communication method |
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| CN112564783B (en) * | 2020-11-04 | 2022-11-08 | 北京遥测技术研究所 | Resource-saving laser radio frequency integrated communication method |
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| CN107682044B (en) | 2019-12-24 |
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