CN106100755A - Adaptive wireless optical communication apparatus and method under water - Google Patents
Adaptive wireless optical communication apparatus and method under water Download PDFInfo
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- CN106100755A CN106100755A CN201610369241.2A CN201610369241A CN106100755A CN 106100755 A CN106100755 A CN 106100755A CN 201610369241 A CN201610369241 A CN 201610369241A CN 106100755 A CN106100755 A CN 106100755A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
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Abstract
One adaptive wireless optical communication apparatus under water, including light emission terminal, optical receiver terminal and master control borad.The present invention utilizes bluish-green laser to carry out subsurface communication, and owing to bluish-green laser is in sea water low loss window, therefore loss is low, the additional present invention uses bluish-green enhanced photomultiplier as photodetector, in conjunction with preposition amplification and main discharge road, detectivity is good, can communication distance long；Utilizing active illumination to combine echo-signal and carry out water quality optical parameter measurement, compact conformation, measure reliable, versatility is good.
Description
Technical field
The present invention relates to one under water, especially adaptive wireless optical communication apparatus and method under marine environment, particularly
A kind of width of Communication ray pulse that will receive based on the backscattering echo signal Full wave shape monitored, prediction opposite end and
Amplitude, thus select suitable modulating-coding parameter and emission parameter, on the premise of ensureing communication surplus, obtain the logical of coupling
Letter speed, in the case of not increasing additional light source mean power, by reducing single pulse energy, improving laser instrument repetition and subtract
Small-pulse effect position modulation time slot width, it is achieved transmission range same under more preferable condition of water quality obtains higher communication speed
Rate, or by reducing laser instrument repetition, improving single pulse energy and increase pulse position modulation time slot width, it is achieved deterioration water
The low rate communication of the same transmission range under the conditions of matter, has given full play to the potential of underwater wireless optical communication system and has overcome
A difficult problem for single parameter undersea optical communications system poor availability, can be widely applied to various underwater wireless optical communication applications field
Close.
Background technology
Ocean take up an area ball surface area nearly 70%, along with human development with utilize deepening continuously of ocean, underwater sensor
Data get more and more, and the efficient communication and one the underwater sensing internet of structure that how to realize depths, ocean under sea water become
One difficult problem.Due to the Kelvin effect of sea water, depths is difficult to use radio communication, and bluish-green laser is owing to being in sea water
Low loss window wavelength, is particularly suitable for underwater wireless optic communication；Pulse position modulation, can owing to having high peak power
To offset partial pulse broadening and the impact of amplitude fading, the bluish-green laser communication system of pulse position modulation is used to realize
The information transmission of relatively long distance under water.Underwater wireless optical communication system performance is closely related with water quality parameter, different water quality pair
Emission parameter has different requirements, and water quality is the poorest, and the burst length broadening caused is the biggest, and amplitude fading is the most serious, then can lead to
Letter speed the lowest, can transmission range the shortest, it is desirable to laser single-pulse energy the strongest；Water quality is the best, the burst length caused
Broadening is the least, and amplitude fading is the slightest, then the speed that can communicate is the highest, and the distance that can transmit is the longest, it is desirable to single laser pulse
Energy is the most weak.Along with the development of pulse laser technology, laser instrument single pulse energy and repetition rate are all improving, transmission
Distance and traffic rate are also being continuously increased, but for the laser instrument of same mean power, single pulse energy and repetition
Frequency product is a constant, and the highest then repetition rate of single pulse energy just reduces, and the highest then single pulse energy of repetition rate is just
Low, need to optimize equipment according to different emphasis.Submarine optical communication is typically based on the water quality ginseng got in advance at present
Number statistical results, based on availability to ensure in the case of worst water quality parameter that still design is reserved with under certain surplus fixing
Traffic rate and communicating under emission parameter, namely use and set repetition rate and the laser instrument of single pulse energy, actually from
Along with the change in season from the perspective of great, water quality parameter has bigger fluctuation, from the perspective of little, all exist every day and differs
Sample.For preferable water quality, pulse transmission broadening is little, and water body decay is little, now will form the saturated of receiving end signal intensity, can
Just can meet communication requirement with less emitted energy, or it is transmitted with higher traffic rate；For poor water
Matter, broadening is transmitted in pulse to be increased, and global channel decay increases, if still according to the emission parameter set, is then difficult to same
Etc. the communication of transmission range, thus cause the waste of equipment and the interruption communicated, and by reducing traffic rate and improving sharp
Light device single pulse energy, the most still can maintain the communication of ground speed, it is ensured that the connection of communication link, for engineer applied
Have great importance.For current undersea optical communications system, owing to emission parameter is fixing, in water quality relatively
Time good, systematic function fails to give full play to, and when water quality is poor, owing to the interruption of communication causes the waste of equipment, limits greatly
Make the application of submarine optical communication, become a difficult problem of restriction submarine optical communication development.
In order to crack an above-mentioned difficult problem, the major influence factors of submarine optical communication performance is studied by we.Impact swashs
The major parameter of light underwater transmission is that absorptance and scattering coefficient, absorptance and scattering coefficient together constitute declining of sea water
Subtract coefficient.The measurement of water quality parameter at present mainly utilizes special absorption/attenuation quotient measuring instrument and scattering coefficient measuring instrument, profit
Be all to measure receiving terminal and the signal ratio of transmitting terminal, based on transmission range and receiving angle, calculate parameter to be measured.At water
The measurement that backscattering echo signal carries out effective attenuation factor, effective attenuation system can also be utilized when lower measurement and airborne measurement
Number, between absorptance and attenuation quotient, when field of view of receiver is sufficiently large, is equivalent to diffusion attenuation quotient, can be used near
Like estimating underwater transmission performance.For submarine optical communication, if the measurement of existing device simplicity can be utilized when launching
To scattering coefficient and effective attenuation factor, then can predict decay and pulse stretching that under given transmission range, water body causes, from
And the emission parameter of design optimization.
In conjunction with advantage and the benefit of water body parameter measurement of submarine optical communication, the present invention can realize underwater wireless optic communication
The Automatic adjusument of system, it is thus achieved that the most sufficient systematic function plays, and has the advantages that overhead is little, increases hardly
Add the complexity of existing equipment, be particularly suitable for the multisensor interconnection of depths, ocean and communicating between surface platform with underwater installation
Contact, it is possible to achieve the Automatic adjusument of traffic rate, is substantially improved system effectiveness, and optical communication field has important under water
Application prospect.
Summary of the invention
The problem to be solved in the present invention is to overcome single parameter radio optical communication system to be met when marine environment is applied
The difficult problem arrived, meets the self-tuning parameter adjustment demand under different quality parameter, it is provided that a kind of general adaptive wireless under water
Optical communication apparatus and method, this device can solve under the conditions of different quality, depths, ocean relatively long distance high-rate information transmission
Time single communication speed can not give full play to the difficult problem of systematic function, realize longer communication distance or bigger as far as possible
Traffic rate, under the conditions of meeting different quality, depths, ocean multisensor interconnection, under water between lash ship and lash barge, lash barge and lash barge
Communication, communication situation between lash ship and frogman and frogman, and can be applicable between the water surface large-scale fleet the water surface with under water
Communication between coordinated, and deep-sea work station and deepwater robot.
The technical solution of the present invention is as follows:
One adaptive wireless optical communication apparatus under water, including light emission terminal, optical receiver terminal and master control borad；Described
Light emission terminal includes that Laser Driven power supply, laser instrument and transmitting expand light path, and described optical receiver terminal includes small-bore connecing
Receiving light path, photodetector and signal amplification circuit, described master control borad includes high-speed data acquisition card, scattering coefficient and decay
Coefficient measurement module, self-adaptive control module, code modulation module and demodulation decoding module, described small-bore receiving light path will
The optical signal received converges on the photodetector of focal point, and the outfan of this photodetector amplifies with described signal
The input of circuit is connected, and the outfan of this signal amplification circuit is connected with the input of described high-speed data acquisition card, should
First outfan of high-speed data acquisition card is connected with the input of described demodulation coding module, and the second outfan is with described
The input of scattering coefficient and attenuation quotient measurement module be connected, the outfan of this scattering coefficient and attenuation quotient measurement module with
The input of described self-adaptive control module is connected, the first outfan of this self-adaptive control module and Laser Driven power supply
First controls end is connected, and the second outfan of this self-adaptive control module is connected with the input of described code modulation module,
Second control end of the outfan of this code modulation module and Laser Driven power supply is connected, the outfan of this Laser Driven power supply and
The input of laser instrument is connected, and expands light path along the transmitting described in the output light path direction placement of this laser instrument.
Described Laser Driven power supply uses ripe pulse laser actuation techniques, can be by outer triggering signal control
Laser output frequency, and regulated laser single-pulse energy by external analog signal；
Described laser instrument is miniaturization all solid state bluish-green laser device, can be driven by laser drive power, launches arteries and veins
Rush bluish-green laser, be suitable for underwater information transmission；
Described transmitting light path and receiving light path use Cassegrain's structure, receive and dispatch same light path, launch laser signal through secondary
45 degree of reflecting mirrors of mirror front end are launched, and receive after signal is collected by primary and secondary mirror and send photodetector to detect；
The optical signal received can be detected by described photodetector, converts optical signal into the signal of telecommunication, and
By signal amplification circuit, the signal of telecommunication is amplified further；
Described high-Speed Data-Acquisition Module, carries out the collection of high speed short time under the control triggering pulse, can will return
The photosignal waveform digitized returned；
Described scattering coefficient and attenuation quotient measurement module, be fitted digitized return photosignal waveform, ask
Solve scattering coefficient and attenuation quotient；
Described self-adaptive control module, based on the scattering coefficient solved and attenuation quotient, changes laser drive power
Size, modulation time slot width and Laser output frequency, it is achieved Self Adaptive Control Coded modulation parameters and emission parameter.
Apply the method that the above-mentioned optical communication apparatus of adaptive wireless under water carries out adaptive wireless optic communication under water, including such as
Lower step:
1. water body parameter actively measuring phases: laser instrument is set to the output of low fixed frequency, first with low single pulse energy
Launch NLIndividual pulse, each pulse delay T0Trigger 1G high-speed data acquisition card and gather TLDuration signal, by NLIndividual impulse waveform is entered
Row is average, carries out exponential fitting according to the waveform after average, the diffusion attenuation quotient recorded in the case of solving low pulse energy and
Scattering coefficient；Secondly N is launched with middle pulse energyMIndividual pulse, each pulse delay T0Trigger 1G high-speed data acquisition card to gather
TM, by NMIndividual impulse waveform is averaged, and carries out exponential fitting according to the waveform after average, surveys in the case of solving middle pulse energy
The diffusion attenuation quotient obtained and scattering coefficient；Again launch N with high pulse energyHIndividual pulse, each pulse delay T0Trigger 1G high
Speed data collecting card gathers TH, by NHIndividual impulse waveform is averaged, and carries out exponential fitting according to the waveform after average, solves height
The diffusion attenuation quotient recorded in the case of pulse energy and scattering coefficient；Finally three results are averaged, are measurement and arrive
Attenuation quotient C and scattering coefficient B；NL、NMAnd NHFor the integer not less than 3.
2. the self-tuning parameter adjustment stage: based on measuring the attenuation quotient C and scattering coefficient B, self-adaptive control module arrived
Change laser instrument single pulse energy, pulse position modulation time slot width Ts, modulation system and control laser instrument be set and trigger sequential,
Realize the Automatic adjusument of laser emitting parameter and Coded modulation parameters；
3. information transmission phase: after emission parameter and traffic rate are provided with, enters into information sending mode, coding
Modulation module by information to be sent according to the time slot width Ts set and coded format coded modulation rear drive Laser Drive
Source so that laser instrument sends and carries the laser of information, and expand light path by transmitting and send, it is achieved the transmission of information；
4. information receive the stage: the demodulating and decoding module high speed acquisition to receiving to digitized signal be demodulated and
Decoding, restores raw information, it is achieved the reception of information；
5. communication is terminated: after whole information to be sent are sent and information receives completely, terminate communication, and break successively
Electricity enters holding state.
The advantage of the present invention adaptive wireless optical communication apparatus and method under water is:
1. the present invention uses miniaturization, Gao Zhongying, high brightness all solid state bluish-green laser device, in conjunction with pulse position modulation, fills
Point utilize peak power, have that long transmission distance, traffic rate be high, low in energy consumption and the little feature of volume；
2. the present invention utilizes bluish-green laser to carry out subsurface communication, owing to bluish-green laser is in sea water low loss window, therefore
Loss is low, the additional present invention use bluish-green enhanced photomultiplier as photodetector, in conjunction with preposition amplification and master
Electric discharge road, detectivity is good, can communication distance long；
3. the present invention utilizes active illumination to combine echo-signal to carry out water quality optical parameter measurement, compact conformation, and measurement can
Leaning on, versatility is good；
4. the present invention utilizes the optical parametric measured that emission system is carried out Self Adaptive Control, has certain intelligence special
Property, the application scenario that available adaptation is different, give full play to the potential of undersea optical communications system, expand undersea optical communications system and can answer
Use environment；
5. under the conditions of the present invention solves different quality, depths, ocean relatively long distance high-rate information transmission time single communication speed
Rate can not give full play to a difficult problem for systematic function, realizes the traffic rate of longer communication distance or bigger as far as possible, full
Under the conditions of foot different quality, the interconnection of depths, ocean multisensor, under water lash ship and lash barge, lash barge and sub-bridge-to-bridge communication, lash ship with
Communication situation between frogman and frogman, and can be applicable to the water surface and coordinated under water between the water surface large-scale fleet, with
And the communication between deep-sea work station and deepwater robot.
6. the invention comprehensively utilizes Backscattering Coefficients in Different Water Bodies measurement technology and adaptive control technology, by backward
The measurement of scatter echo signal, solves water body attenuation quotient and scattering coefficient, and then the transmitting of Self Adaptive Control laser instrument and tune
Parameter processed, it is achieved that the adaptation rate communication under varying environment, has that volume is little, integrated level is high, intelligent strong feature.
Accompanying drawing explanation
Fig. 1 is present invention adaptive wireless optical communication apparatus under water and method overall structure and internal logic functional unit shows
It is intended to；
Fig. 2 is present invention adaptive wireless optical communication apparatus under water and the flow chart of method work.
In figure: 1 light emission terminal, 11 Laser Driven power supplys, 12 laser instrument, 13 transmittings expand light path, 2 light
Receiving terminal, 21 small-bore receiving light paths, 22 photodetectors, 23 signal amplification circuits, 3 master control borads, 31 is high
Speed data acquisition module, 32 scattering coefficients and attenuation quotient measurement module, 33 self-adaptive control modules, 34 coded modulation
Module, 35 demodulating and decoding modules.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the invention will be further described, but should not limit the protection model of the present invention with this
Enclose.
With the optic communication of adaptive wireless under water under certain occasion as embodiment, use pulse position modulation mode, average merit
Rate 1W green (light) laser is as light source, and the bluish-green enhanced photomultiplier of Metal Packaging, can according to water quality not as detector
Realize the regulation of traffic rate with self adaptation, 10kbps speed, the underwater transmission distance of 100 meters, II can be realized under I class water quality
The underwater transmission distance of 2.5kbps speed and 80 meters can be realized under class water quality, can realize under Group III water quality 0.3kbps speed and
The underwater transmission distance of 50 meters.
First refer to Fig. 1, Fig. 1 is present invention adaptive wireless optical communication apparatus under water and method overall structure and inside
Logic function unit schematic diagram.As seen from Figure 1, present invention adaptive wireless optical communication apparatus under water and method are by light emission terminal
1, optical receiver terminal 2 and master control borad 3 are constituted.Wherein light emission terminal 1 is expanded by Laser Driven power supply 11, laser instrument 12 and transmitting
Light path 13 is constituted；Optical receiver terminal 2 is by small-bore receiving light path 21, photodetector 22 and signal amplification circuit 23；Master control borad 3
By high-Speed Data-Acquisition Module 31, scattering coefficient and attenuation quotient measurement module 32, self-adaptive control module 33, coded modulation mould
Block 34 and demodulating and decoding module 35 form.Its position and annexation be: Laser Driven power supply 11 is respectively by SMA interface and volume
Code modulation module 34 and self-adaptive control module 33 connect, and receive code modulation module 34 and the control of self-adaptive control module 33
System, drives laser instrument 12 to launch the pulse laser of the information that carries, and the transmitting before this laser light incident to laser instrument 12 expands light
Road 13, launches after the laser alignment that will inject；Small-bore receiving light path 21 is positioned at whole system foremost, will connect
The optical signal received converges on the photodetector 22 of focal point, and photodetector 22 carries out opto-electronic conversion and converted by optical signal
Be sent to the signal amplification circuit 23 of rear end for the signal of telecommunication, signal is amplified by signal amplification circuit 23；Signal after amplification
Exporting to high-speed data acquisition card 31, high-speed data acquisition card 31 carries out Full wave shape collection, collection result to the signal after amplifying
Send scattering coefficient and attenuation quotient measurement module 32 to measure respectively and be demodulated decoding, in parameter with demodulating and decoding module 35
Measuring phases, small-bore receiving light path 21 is collected self laser instrument 12 and is launched the back scattering optical signal of laser, through photodetection
Device 22 send signal amplification circuit 23 to export after amplifying after carrying out opto-electronic conversion；Under the triggering that time delay output triggers pulse, at a high speed
Data collecting card 31 carries out Full wave shape collection to the signal after amplifying, and collection result send scattering coefficient and attenuation quotient measurement module
32 measure, and attenuation quotient measurement module 32 can calculate corresponding scattering coefficient and decay system according to waveform fitting result
Number, self-adaptive control module 33 automatically selects code modulation module 34 running parameter based on measurement result and ginseng launched by laser instrument
Number, finally controls the current amplitude of Laser Driven power supply 11, goes out light frequency and coded modulation characteristic, in the communications reception stage, little
What bore receiving light path 21 was collected is the laser signal of end transmitting, and after photodetector 22 carries out opto-electronic conversion, the number of delivering letters is amplified
Circuit 23 exports after amplifying；Signal after amplifying is digitized by high-speed data acquisition card 31, and demodulating and decoding module 35 is permissible
The digitized signal including information is demodulated and decodes, thus restores information, it is achieved the reception of information, finally realize
Adaptive communications under the conditions of different quality.
The concrete device that the present embodiment uses is: in described light emission terminal 1, Laser Driven power supply 11 selects Shanghai ray machine
Institute's type product, laser instrument 12 selects Shanghai ray machine institute mean power 1W series green (light) laser, transmitting to expand light path 13 and select
4 times of beam-expanding collimation mirrors of Thorlabs company；In described optical receiver terminal 2, small-bore receiving light path 21 selects Thorlabs company 3
" bore, focal length 100mm product, photodetector 22 selects Bin Song company Metal Packaging, bluish-green enhanced photomultiplier
R9880 series of products, signal amplification circuit 23 selects Shanghai XX company low noise small signal amplifier；Described master control borad 3 is upper
Sea light machine is based on XinlinxV4FPGA and TI 6405DSP and certainly grinds integrated board, and wherein high-Speed Data-Acquisition Module 31 is selected
Gage company 1G sampling rate board, scattering coefficient and attenuation quotient measurement module 32, self-adaptive control module 33, coded modulation
Module 34 and demodulating and decoding module 35, be all programmed to by software kernel by DSP and FPGA.
Next refer to Fig. 2, Fig. 2 is present invention adaptive wireless optical communication apparatus under water and the flow chart of method work.
As shown in Figure 2, first carrying out water body parameter and actively measure, system electrification, master control borad resets, and laser instrument is with basic, normal, high three kinds of lists
Pulse energy respectively launches ten pulses, i.e. NL、NMAnd NHIt is all 10, measures corresponding diffusion attenuation quotient and scattering coefficient, by three
Result under the conditions of Zhong is averaged, and is and measures the attenuation quotient and scattering coefficient arrived；Subsequently enter self-tuning parameter adjustment,
Based on measuring the attenuation quotient and scattering coefficient arrived, self-adaptive control module regulation laser instrument single pulse energy, repetition rate, if
Put pulse position modulation time slot width and control laser instrument triggering sequential, it is achieved laser emitting parameter and the self adaptation of traffic rate
Regulation；Next after emission parameter and traffic rate are provided with, entering into information sending mode, code modulation module will be treated
Transmission information is according to the time slot width coded modulation rear drive laser driving source set so that bluish-green laser device sends and carries
The bluish-green laser of information, and send by launching light path；Under information reception mode, demodulating and decoding module is to receiving
High speed acquisition to digitized signal be demodulated and decode, restore raw information, it is achieved the reception of information；Finally, entirely
Portion's information to be sent is sent after receiving completely with information, terminates communication, and power-off enters holding state successively.
In conjunction with Fig. 1 and Fig. 2, the present invention implements based on water quality parameter actively measurement, modulating-coding parameter and emission parameter certainly
The detailed process of the wireless light communication of dynamic control realization adaptation rate under water is:
1. water body parameter actively measuring phases: laser instrument is set to the output of low fixed frequency, first with low single pulse energy
Amount launches 10 pulses, and each pulse delay 20ns triggers 1G high-speed data acquisition card and gathers 100ns duration signal, by 10 arteries and veins
Rushing waveform to be averaged, carry out exponential fitting according to the waveform after average, the diffusion recorded in the case of solving low pulse energy declines
Subtract coefficient and scattering coefficient；Secondly launching 10 pulses with middle pulse energy, each pulse delay 20 triggers 1G high-speed data and adopts
Truck gathers 100ns, 10 impulse waveforms is averaged, and carries out exponential fitting according to the waveform after average, solves middle pulse
The diffusion attenuation quotient recorded under energy situation and scattering coefficient；Again launch 10 pulses, each pulse with high pulse energy
Time delay 20ns triggers 1G high-speed data acquisition card and gathers 100ns, 10 impulse waveforms is averaged, according to the waveform after average
Carry out exponential fitting, the diffusion attenuation quotient recorded in the case of solving high pulse energy and scattering coefficient；Finally by three results
It is averaged, is and measures the attenuation quotient C and scattering coefficient B arrived；
2. the self-tuning parameter adjustment stage: based on measuring the attenuation quotient C and scattering coefficient B, self-adaptive control module arrived
Change laser instrument single pulse energy, pulse position modulation time slot width Ts, modulation system and control laser instrument be set and trigger sequential,
Realize the Automatic adjusument of laser emitting parameter and Coded modulation parameters；
3. information transmission phase: after emission parameter and traffic rate are provided with, enters into information sending mode, coding
Modulation module by information to be sent according to the time slot width Ts set and coded format coded modulation rear drive Laser Drive
Source so that laser instrument sends and carries the laser of information, and expand light path by transmitting and send, it is achieved the transmission of information；
4. information receives the stage: demodulating and decoding module to high speed acquisition to digitized signal be demodulated and decode, also
Former go out raw information, it is achieved the reception of information；
5. communication is terminated: after whole information to be sent are sent and information receives completely, terminate communication, and break successively
Electricity enters holding state.
Claims (9)
1. an adaptive wireless optical communication apparatus under water, it is characterised in that include light emission terminal (1), optical receiver terminal (2)
With master control borad (3)；
Described light emission terminal (1) includes that Laser Driven power supply (11), laser instrument (12) and transmitting expand light path (13), described
Optical receiver terminal (2) include small-bore receiving light path (21), photodetector (22) and signal amplification circuit (23), described
Master control borad (3) includes high-speed data acquisition card (31), scattering coefficient and attenuation quotient measurement module (32), self-adaptive control module
(33), code modulation module (34) and demodulation decoding module (35), the light that described small-bore receiving light path (21) will receive
Signal gathering is on the photodetector (22) of focal point, and the outfan of this photodetector (22) amplifies electricity with described signal
The input on road (23) is connected, the outfan of this signal amplification circuit (23) and the input of described high-speed data acquisition card (31)
End is connected, and first outfan of this high-speed data acquisition card (31) is connected with the input of described demodulation coding module (35),
Second outfan is connected with the input of described scattering coefficient and attenuation quotient measurement module (32), this scattering coefficient and decay
The outfan of coefficient measurement module (32) is connected with the input of described self-adaptive control module (33), this self-adaptive controlled molding
First control end of the first outfan of block (33) and Laser Driven power supply (11) is connected, the of this self-adaptive control module (33)
Two outfans are connected with the input of described code modulation module (34), the outfan of this code modulation module (34) and laser
The the second control end driving power supply (11) is connected, the input phase of the outfan of this Laser Driven power supply (11) and laser instrument (12)
Even, light path (13) is expanded along the transmitting described in the output light path direction placement of this laser instrument (12).
Adaptive wireless optical communication apparatus under water the most according to claim 1, it is characterised in that described Laser Driven electricity
Source (11) is connected with described code modulation module (34) and self-adaptive control module (33) by SMA interface respectively.
Adaptive wireless optical communication apparatus under water the most according to claim 1, it is characterised in that described Laser Driven electricity
Source (11) uses ripe pulse laser actuation techniques, outer triggering signal control Laser output frequency, and by outside mould
Intend Signal Regulation laser single-pulse energy.
Adaptive wireless optical communication apparatus under water the most according to claim 1, it is characterised in that described laser instrument (12)
For miniaturization all solid state bluish-green laser device, laser drive power drive, launch pulse bluish-green laser, be suitable for underwater information and pass
Defeated.
Adaptive wireless optical communication apparatus under water the most according to claim 1, it is characterised in that described transmitting light path and
Receiving light path uses Cassegrain's structure, receives and dispatches same light path, launches the laser signal 45 degree of reflecting mirrors through secondary mirror front end and launches
Go, receive after signal is collected by primary and secondary mirror and send photodetector to detect.
Adaptive wireless optical communication apparatus under water the most according to claim 1, it is characterised in that described photodetector
(22) optical signal received is detected, convert optical signal into the signal of telecommunication, and incited somebody to action by signal amplification circuit further
The signal of telecommunication is amplified.
Adaptive wireless optical communication apparatus under water the most according to claim 1, it is characterised in that described high-speed data is adopted
Collection module (31) carries out the data acquisition of high speed short time under the control triggering pulse, the photosignal waveform digitized that will return.
Adaptive wireless optical communication apparatus under water the most according to claim 1, it is characterised in that described scattering coefficient and
Digitized return photosignal waveform is fitted by attenuation quotient measurement module (32), solves scattering coefficient and attenuation quotient.
9. one kind utilizes the arbitrary described optical communication apparatus of adaptive wireless under water of claim 1-8 to carry out adaptive wireless under water
The method of optic communication, it is characterised in that the method comprises the steps:
1. water body parameter actively measuring phases: laser instrument is set to the output of low fixed frequency, first sends out with low single pulse energy
Penetrate NLIndividual pulse, each pulse delay T0Trigger 1G high-speed data acquisition card and gather TLDuration signal, by NLIndividual impulse waveform is carried out
Averagely, carrying out exponential fitting according to the waveform after average, the diffusion attenuation quotient recorded in the case of solving low pulse energy is with scattered
Penetrate coefficient；Secondly N is launched with middle pulse energyMIndividual pulse, each pulse delay T0Trigger 1G high-speed data acquisition card and gather TM,
By NMIndividual impulse waveform is averaged, and carries out exponential fitting according to the waveform after average, records in the case of solving middle pulse energy
Diffusion attenuation quotient and scattering coefficient；Again launch N with high pulse energyHIndividual pulse, each pulse delay T0Trigger 1G at a high speed
Data collecting card gathers TH, by NHIndividual impulse waveform is averaged, and carries out exponential fitting according to the waveform after average, solves high arteries and veins
Rush the diffusion attenuation quotient and scattering coefficient recorded under energy situation；Finally three results are averaged, are what measurement was arrived
Attenuation quotient C and scattering coefficient B；NL、NMAnd NHFor the integer not less than 3；
2. the self-tuning parameter adjustment stage: based on measuring the attenuation quotient C and scattering coefficient B arrived, self-adaptive control module changes
Laser instrument single pulse energy, arranges pulse position modulation time slot width Ts, modulation system and control laser instrument and triggers sequential, it is achieved
Laser emitting parameter and the Automatic adjusument of Coded modulation parameters；
3. information transmission phase: after emission parameter and traffic rate are provided with, enters into information sending mode, coded modulation
Information to be sent according to the time slot width Ts set and coded format coded modulation rear drive laser driving source, is made by module
Laser instrument sends and carries the laser of information, and expand light path by transmitting and send, it is achieved the transmission of information；
4. information receive the stage: demodulating and decoding module to high speed acquisition to digitized signal be demodulated and decode, restore
Raw information, it is achieved the reception of information；
5. communication is terminated: after whole information to be sent are sent and information receives completely, terminate communication, and power-off is entered successively
Enter holding state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610369241.2A CN106100755B (en) | 2016-05-30 | 2016-05-30 | Underwater adaptive wireless optical communication apparatus and method |
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| CN201610369241.2A CN106100755B (en) | 2016-05-30 | 2016-05-30 | Underwater adaptive wireless optical communication apparatus and method |
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| CN106100755A true CN106100755A (en) | 2016-11-09 |
| CN106100755B CN106100755B (en) | 2018-06-19 |
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| CN201610369241.2A Active CN106100755B (en) | 2016-05-30 | 2016-05-30 | Underwater adaptive wireless optical communication apparatus and method |
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| CN106950559A (en) * | 2017-04-10 | 2017-07-14 | 北京华夏光谷光电科技有限公司 | Multiband semiconductor laser undersea detection/lighting device |
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| CN112468238A (en) * | 2020-11-12 | 2021-03-09 | 中国科学院上海光学精密机械研究所 | Underwater all-optical autonomous information interaction and relative positioning device |
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| EP2393221B1 (en) * | 2010-06-03 | 2015-07-22 | Alcatel Lucent | Undersea power distribution system |
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