CN107819523A - High speed in reversed direction modulation reflecting module and transmission and reflection method based on modulator - Google Patents
High speed in reversed direction modulation reflecting module and transmission and reflection method based on modulator Download PDFInfo
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- CN107819523A CN107819523A CN201711106085.1A CN201711106085A CN107819523A CN 107819523 A CN107819523 A CN 107819523A CN 201711106085 A CN201711106085 A CN 201711106085A CN 107819523 A CN107819523 A CN 107819523A
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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
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
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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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- 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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
-
- 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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of high speed in reversed direction modulation reflecting module and transmission and reflection method based on modulator.Including optical antenna, space fiber coupling device, optical circulator, Polarization Controller, signal source, electrooptic modulator, optical antenna is incided in electrooptic modulator from the light carrier that free space receives through the coupling of space fiber coupling device, the electric signal for being sent signal source by electrooptic modulator is modulated on the light carrier from space fiber coupling device and produces optical signal, optical signal is reflected back by space fiber coupling device by optical circulator, again free space is coupled back into through space fiber coupling device, through the reverse retroeflection of optical antenna, it is achieved in high speed long range free-space communication.The present invention is used for high speed in reversed direction and modulates reflective free space laser communication system, reduce the volume and power consumption of reverse modulation terminal equipment, the transmission rate of upward signal is greatly improved simultaneously, meets the needs of the free space optical signal transmission of high-speed high capacity long range of future generation.
Description
Technical field
The present invention relates to a kind of high speed in reversed direction of signal to modulate reflection function module and transmission and reflection method, more particularly, to
A kind of high speed in reversed direction modulation reflecting module and transmission and reflection method based on modulator.
Background technology
With the rapidly development become increasingly popular with Spatial Information Technology of the communication equipments such as mobile phone, computer, people are at a high speed
The demand of wireless messages safe transmission increases rapidly.Free space optical communication technology has many potential advantages, such as security
Height, strong antijamming capability, bandwidth be high and spectrum utilization factor height etc., be widely used to mobile device and base station (aircraft, satellite and
Ground surface platform etc.) between the information transmission system.However, the high-precision active free-space optical systems of tradition generally have volume
The shortcomings of weight is big, device is complicated and power consumption is high, it is a kind of very big to having strict load request and the terminal installation of energy consumption limitation
Challenge.Reverse modulation reflecting module is as a kind of competitive terminal installation, with reference to optics retroeflector and modulator,
Optical signal after modulation is directly reflexed to signal transmitting terminal, most weight and power consumption are transferred to FSO
On the base station of system, the application limitation of FSO is can effectively solve the problem that, thus it is real using reverse modulation reflecting module
Existing FSO, reduces the volume of terminal installation and technical sophistication degree has become an important trend.
Existing reverse modulation scheme includes frustrated total internal reflection device, liquid crystal modulator and multiple quantum well devices and reflection
Formula semiconductor optical amplifier etc., the modulation rate of these schemes is relatively low, highest only up to 1.25 gigabit/secs, still reaches to not
To the requirement of Modern optical communication high-speed (tens or even hundreds of gigabit/sec).
The content of the invention
It is an object of the invention to provide a kind of high speed in reversed direction modulation reflecting module based on modulator and transmission and reflection side
Method, the reverse modulation reflection of incident light can be realized.
The present invention utilizes the High Speed Modulation of electrooptic modulator, coordinates optical antenna, space-fiber coupling device and ring of light row
Device, you can the function of the reverse modulation reflection of high speed is realized, to realizing that high speed long range free-space communication has important show
Sincere justice.
The technical solution adopted by the present invention is：
First, a kind of high speed in reversed direction modulation reflecting module based on modulator：
Including optical antenna, space-fiber coupling device, optical circulator, Polarization Controller, signal source, electrooptic modulator；
Optical antenna is connected with space-fiber coupling device by space optical coupling, and the of space-fiber coupling device and optical circulator
Two-port netwerk end is connected by optical fiber, and the 3rd port of optical circulator is connected with Polarization Controller by optical fiber, Polarization Controller and
The input of electrooptic modulator is connected by optical fiber, and the output end of electrooptic modulator and the first port of optical circulator pass through optical fiber
Connection, electrooptic modulator and signal source pass through cable connection.
The optical antenna incides ring of light row from the light carrier that free space receives through space-fiber coupling device coupling
In device, it is transferred to after Polarization Controller in electrooptic modulator, the electric signal for being sent signal source by electrooptic modulator is modulated
Optical signal is produced on to the light carrier from space-fiber coupling device, being reflected back space-fiber coupling by optical circulator fills
Put, then free space is coupled back into through space-fiber coupling device, through the reverse retroeflection of optical antenna, be achieved at a high speed over long distances
Free-space communication.
The present invention utilizes the High Speed Modulation of electrooptic modulator, coordinates optical antenna, space-fiber coupling device and ring of light shape
Device, realize the function of high speed in reversed direction modulation reflecting module.The present invention carries out this with optical circulator and electrooptic modulator collocation mode
Kind processing substantially reduces volume compared to the optical signal transmission of existing prism, reduces power consumption.
2nd, a kind of high speed in reversed direction modulation transmission and reflection method based on modulator：
It will be incided from the light carrier that free space receives by optical circulator and Polarization Controller in electrooptic modulator, together
When data signal is loaded into electrooptic modulator, digital modulation electric signal is modulated to by the upper of light carrier by electrooptic modulator
Optical signal is produced, then by optical circulator retrodirective reflection light echo carrier wave original entry port, is achieved in freely empty over long distances at a high speed
Between communicate.
The modulation format of described reverse modulation reflecting module and modulation rate by electrooptic modulator modulation type and most
High modulation rate determines that wherein modulation format is on-off keying signal or differential phase keying (DPSK) signal or quaternary phase-shift keying (PSK) letter
Number, modulation rate is at least up to 10 gigabit/secs, hence in so that module and mode of the present invention compared to existing reverse modulation reflection
(gigabit/sec of transmission rate highest 1.25 of existing this structure) substantially increases transmission rate.
The beneficial effects of the invention are as follows：
Only an optical circulator and electrooptic modulator is needed to realize High Speed Modulation and reflection function simultaneously in the present invention,
Transmission rate is drastically increased, modulated signal transmission rate is at least up to 10 gigabit/secs, while also reduce terminal device
Volume and weight, to realize that smaller faster more remote free-space communication has important practical significance.
The present invention can be used for high speed in reversed direction to modulate reflective free space laser communication system, reduces reverse modulation terminal and sets
Standby volume and power consumption, while the transmission rate of upward signal is greatly improved, high-speed high capacity long range of future generation can be met
The needs of free space optical signal transmission.
Brief description of the drawings
Fig. 1 is the attachment structure schematic diagram of apparatus of the present invention.
Fig. 2 is the eye pattern of reverse modulation reflected signal in the embodiment of the present invention.
In figure：1 is optical antenna, and 2 be space-fiber coupling device, and 3 be optical circulator, and 4 be Polarization Controller, and 5 be letter
Number source, 6 electrooptic modulators.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown in figure 1, the high speed in reversed direction modulation reflecting module of the present invention includes optical antenna 1, space-fiber coupling device
2nd, optical circulator 3, Polarization Controller 4, signal source 5, electrooptic modulator 6.The light carrier warp that optical antenna 1 receives from free space
The coupling of space-fiber coupling device 2 is incided in optical circulator 3, is transferred to by Polarization Controller 4 in electrooptic modulator 6, is led to
Cross electrooptic modulator 6 electric signal that signal source 5 is sent is modulated on the light carrier from space-fiber coupling device 2 and produce
Optical signal, space-fiber coupling device 2 is then reflected back by optical circulator, then be coupled back into through space-fiber coupling device 2
Free space, through 1 reverse retroeflection of optical antenna.
In the present invention, existing various space light collimation devices and system can be selected in optical antenna, as lens, optics are looked in the distance
Various business components can be selected in system etc., space-fiber coupling device, optical circulator, Polarization Controller, electrooptic modulator.
The flashlight of apparatus of the present invention is received by optical antenna 1, and signal is coupled to the ring of light through space-fiber coupling device 2
Shape device 3, electrooptic modulator 6 then is transferred to through Polarization Controller 4, using the High Speed Modulation of electrooptic modulator, signal source 5 is sent out
The electric signal gone out, which is modulated on light carrier, produces optical signal, is then reflected by optical circulator, the flashlight of reflection again by
Space-fiber coupling device 2 is coupled in free space, then by 1 reverse retroeflection of optical antenna.
Embodiments of the invention are as follows：
Reflecting module is modulated according to the above-mentioned high speed in reversed direction based on electrooptic modulator, utilizes the sky that wavelength is 1550 nanometers
Between laser signal, the space laser signal is coupled into optical circulator through optical antenna and space-fiber coupling device, light
Circulator is connected with Polarization Controller, is input to electrooptic modulator through Polarization Controller, signal source produces the puppet of 10 gigabit/secs
Random binary sequence is loaded on electrooptic modulator to simulate the modulated signal in practical application and is modulated to on-off keying
Signal (OOK), after optical circulator, the on-off keying signal (OOK) of modulation is coupled to freedom into space-fiber coupling device
Space, then by the reverse retroeflection of optical antenna, receive in space laser signal transmitting terminal and detected with photodetector, surveyed in experiment
What is obtained is as shown in Figure 2 by the signal eye diagram of free space transmission.
The modulation rate of the Mach of the embodiment of the present invention once DS intensity modulators supports 10 gigabit/secs, therefore this implementation
The downlink and uplink peak transfer rate that example can reach is also 10 gigabit/secs.But it can be used in specific practical operation higher
The electrooptic modulator of speed, such as quadrature quadrature modulator (IQM), highest modulation rate can reach at least 100 gigabit/secs, because
Peak transfer rate not limited to this in this structure application of the present invention.
As can be seen here, the technology of the present invention significant effect, the function of reverse modulation reflection can be achieved, there is the characteristics of high speed,
The volume and power consumption of reverse modulation terminal equipment are reduced, while improves the transmission rate of upward signal.
Claims (4)
- A kind of 1. high speed in reversed direction modulation reflecting module based on modulator, it is characterised in that：Including optical antenna (1), space-light Fine coupling device (2), optical circulator (3), Polarization Controller (4), signal source (5) and electrooptic modulator (6)；Optical antenna (1) Connected with space-fiber coupling device (2) by space optical coupling, space-fiber coupling device (2) and optical circulator (3) Second port end is connected by optical fiber, and the 3rd port of optical circulator (3) is connected with Polarization Controller (4) by optical fiber, polarization Controller (4) is connected with the input of electrooptic modulator (6) by optical fiber, the output end and optical circulator of electrooptic modulator (6) (3) first port is connected by optical fiber, and electrooptic modulator (6) and signal source (5) pass through cable connection.
- A kind of 2. high speed in reversed direction modulation reflecting module based on modulator according to claim 1, it is characterised in that：It is described Optical antenna (1) incides optical circulator (3) from the light carrier that free space receives through space-fiber coupling device (2) coupling In, it is transferred to after Polarization Controller (4) in electrooptic modulator (6), is sent signal source (5) by electrooptic modulator (6) Electric signal, which is modulated on light carrier, produces optical signal, and optical signal is reflected back space-fiber coupling device by optical circulator (3) (2) free space, then through space-fiber coupling device (2) is coupled back into, through optical antenna (1) reverse retroeflection, is achieved at a high speed Long range free-space communication.
- A kind of 3. high speed in reversed direction modulation transmission and reflection method based on modulator, it is characterised in that：By what is received from free space Light carrier is incided in electrooptic modulator by optical circulator and Polarization Controller, while digital electric signal is loaded into electric light and adjusted In device processed, digital electric signal is modulated on light carrier by electrooptic modulator and produces optical signal, then it is reverse by optical circulator Reflected light carrier wave original entry port, is achieved in high speed long range free-space communication.
- A kind of 4. high speed in reversed direction modulation transmission and reflection method based on modulator according to claim 3, it is characterised in that： The modulation format of described reverse modulation reflecting module is modulated with modulation rate by the modulation type and highest of electrooptic modulator (6) Speed determines that wherein modulation format is on-off keying signal or differential phase keying (DPSK) signal or quaternary phase shift keyed signal, is adjusted Speed processed is at least up to 10 gigabit/secs.
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| CN201711106085.1A CN107819523B (en) | 2017-11-10 | 2017-11-10 | High-speed reverse modulation reflection module based on modulator and reflection transmission method |
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| CN201711106085.1A CN107819523B (en) | 2017-11-10 | 2017-11-10 | High-speed reverse modulation reflection module based on modulator and reflection transmission method |
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| CN107819523A true CN107819523A (en) | 2018-03-20 |
| CN107819523B CN107819523B (en) | 2021-04-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039439A (en) * | 2018-07-02 | 2018-12-18 | 曾昭雄 | Communication means, device and terminal |
| CN109844679A (en) * | 2016-10-11 | 2019-06-04 | X开发有限责任公司 | Optical circulator for free space optical communication |
| CN110266386A (en) * | 2019-07-10 | 2019-09-20 | 电子科技大学 | A kind of reflective coherent optical communication system of the unidirectional optical signal amplification of combination |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104270193A (en) * | 2014-10-28 | 2015-01-07 | 长春理工大学 | Full duplex cat eye reverse modulation recovery free space laser communication system |
| CN106656325A (en) * | 2016-11-14 | 2017-05-10 | 浙江大学 | High-speed single-light source two-way free space laser communication system |
| CN106712845A (en) * | 2016-11-14 | 2017-05-24 | 浙江大学 | RSOA-based high-speed amplified reverse modulation reflective module and implementation method |
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2017
- 2017-11-10 CN CN201711106085.1A patent/CN107819523B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270193A (en) * | 2014-10-28 | 2015-01-07 | 长春理工大学 | Full duplex cat eye reverse modulation recovery free space laser communication system |
| CN106656325A (en) * | 2016-11-14 | 2017-05-10 | 浙江大学 | High-speed single-light source two-way free space laser communication system |
| CN106712845A (en) * | 2016-11-14 | 2017-05-24 | 浙江大学 | RSOA-based high-speed amplified reverse modulation reflective module and implementation method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109844679A (en) * | 2016-10-11 | 2019-06-04 | X开发有限责任公司 | Optical circulator for free space optical communication |
| US10992379B2 (en) | 2016-10-11 | 2021-04-27 | X Development Llc | Optical circulator for free space optical communication |
| CN109039439A (en) * | 2018-07-02 | 2018-12-18 | 曾昭雄 | Communication means, device and terminal |
| CN110266386A (en) * | 2019-07-10 | 2019-09-20 | 电子科技大学 | A kind of reflective coherent optical communication system of the unidirectional optical signal amplification of combination |
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| CN107819523B (en) | 2021-04-06 |
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