CN101873169A - Receiving system in wireless optical communication and signal receiving method thereof - Google Patents
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Abstract
The invention relates to a receiving system in wireless optical communication and a signal receiving method thereof, and belongs to the field of optical communication. The system comprises a group of focusing lenses, a group of fiber or waveguide array, a group of optical signal delayers, a group of optical phase modulators, an optical coupler, an optical filter, a photoelectric detector, an analysis and calculation control module and a decoding and sampling judgment module. The method comprises the following steps of: 1) focusing and feeding spacial optical signals into a fiber array by adopting the group of focusing lenses; 2) performing phase delay and phase modulation on each path of the fiber array, and coupling-out a path of optical signals; 3) filtering the optical signals, converting the optical signals into electric signals, and outputting the electric signals to the decoding and sampling judgment module and the analysis and calculation control module respectively; and 4) in a communication time slot, restoring original information from the received electric signals by using the decoding and sampling judgment module, and in a reference time slot, performing feedback adjustment on each path of received optical signals by using the analysis and calculation control module. The receiving system and the signal receiving method thereof have the advantages of easy implementation and high precision.
Description
Technical field
The present invention relates to the receiving system of a kind of length, relate in particular to receiving system and signal acceptance method thereof in a kind of wireless light communication, belong to optical communication field apart from wireless light communication (Wireless Optical Communication is abbreviated as WOC).
Background technology
In the last few years, the radio communication fast development, wireless user's cumulative year after year, business be variation more, and data service is sharply soaring, makes broadband wireless signal and carrier frequency urgent day by day to the demand of high frequency expansion.Under such demand, wireless light communication is subjected to increasing attention as the extension of wireless radiofrequency communication in the optical frequency territory, becomes one of key technology of following super broad band radio communication.Communicate by letter with traditional wireless radiofrequency and to compare, the non-radiofrequency signal of the carrier wave of wireless light communication but the light signal of higher frequency.Frequency resource that wireless light communication not only has some advantages of wireless radiofrequency communication---facility is built conveniently, is not vulnerable to the landform restriction, and weight, volume are less, is fit to move and uses, and even better aspect a lot---is abundant and be not subjected to Legal Regulation; Transmit and the not mutual interference mutually of other electronic devices; Signal directive property height, wave beam is dispersed little, and capacity usage ratio height and signal are difficult for being blocked, the confidentiality height.Along with the progress of optoelectronic development and micro fabrication, optical antenna, light source etc. can be accomplished than radio-frequency antenna and the littler volume and weight of radio frequency source, is fit to application such as vehicle-mounted, carrier-borne, spaceborne more.Yet because optical wavelength is shorter, diffraction effect is not obvious, compares so communicate by letter with wireless radiofrequency, and light signal is decayed bigger in atmosphere, is subjected to the influence of weather environment more serious.The wireless light communication of therefore long distance requires higher receiving sensitivity technically.
Traditional wireless light communication reception programme as shown in Figure 1, this receiving system comprises that mainly tracking aiming control module 2 and signal receiving processing module 3 constitutes.Tracking aiming control module 2 mainly comprises super wide visual field amasthenic lens 1, filtering device 5 (in order to the stray light signal outside the filtering 1550nm Communication ray frequency range), CCD photodetector array 6, and calculating and control unit 7, its function is the angle by the analysis incident beam, calculate the relative position of emission side, thereby adjust the sensing of universal joint 9, make the receiving plane of signal receiving processing system can aim at the incoming signal light beam come to, thereby guarantee receiving efficiency.The concrete course of work is: the spacing wave light beam of the side of emission user emission is focused lens 1 catch after, further focus on by telecentric imaging lens 4, to reduce the angle of light beam and lens main shaft and filtering device main shaft, suppress background noise by filtering device 5 again, image in then on the ccd detector array 6 of receiving terminal.The ccd detector array changes light signal into the signal of telecommunication, and delivers to and calculate and control unit.The incident beam incident angle is not simultaneously, its position that is imaged on CCD is also different, so the function of calculating and control unit is: one by analyzing image space and the imaging shape that detects on the CCD face battle array, can calculate the incident angle and the wavefront shape of incident beam in real time; Its two, by the result of calculation of incident wave beam angle and shape, correspondingly control universal joint rotation, aim at the direction of incident beam to adjust its transmitter/receiver, the feedback light signal is to the other user's node.Signal receiving processing module 2 mainly comprises super wide visual field amasthenic lens 1, filtering device 5, photodetector 10 and a signal of telecommunication sampling judging module 11.Under regulating, the tracking aiming control module make the reception plane of receiver with after the incident optical signal direction is vertical, light signal is caught by the amasthenic lens in the signal receiving processing module 1, behind filtering device 5 filtering out-of-band noise light signals, incide on the photodetector 10 and be converted into the signal of telecommunication, obtain the needed number signal of telecommunication through signal of telecommunication sampling judging module more afterwards.
Yet the performance of the wireless light communication reception programme that this is traditional is subjected to some restrictions.One, in the wireless light communication of long distance is used, for example optical communication between star, the optical communication of star ground, because propagation distance is far away, wave beam is dispersed greatly, received power on the unit are is less, under the condenser lens receiving area condition of limited, the signal that receives is very faint, and this has proposed very high requirement to the receiving sensitivity of photodetector and the noise inhibiting ability of filtering device.Its two, if, can adopt the condenser lens of super large in order to improve the signal power that receives, realize bigbore light beam seizure, but the processing technology difficulty of big lens is very big, processing cost is too high, and volume weight is big, and integrated level is low, is difficult to be applied to occasions such as spaceborne, carrier-borne.When heavy caliber receives simultaneously, after the light field on the receiving plane converges, the decline of signal in the time of perhaps can causing on photodetector, synthesizing owing to the phase place that receives diverse location light field on the bore is inconsistent.They are three years old, the correlative study of space filtering device is also still immature in the tradition reception programme, big (common tens nm of common interferometric filter bandwidth, preferably can reach 0.2-0.3nm), but the light field that also only enters filter along collimation axis, if incident angle increases, not only can cause the centre wavelength of filter to be drifted about, can make its bandwidth of increase reduce peak transmittance simultaneously simultaneously, the final noise power of passing through that increases reduces the quality of reception.Also there is part Study mechanism to develop faraday's type anomalous dispersion atomic light filter (FaradayAnomalous Dispersion Optical Filter of experiment usefulness both at home and abroad, be abbreviated as FADOF) and Fo Ketuo anomalous dispersion atomic light filter (VoigtAnomalous Dispersion Optical Filter, be abbreviated as VADOF), equivalent noise bandwidth can reach 0.02nm (S.Bloom respectively, V.Chan and C.S.Liu, " High-elevation terrestrial validation of BMDO lasercom systemat 1.1Gbit/s ", Proc.of SPIE, 1995, Vol.2381:113-128) and 0.01nm (Tang Junxiong, Liu Lu, Wang Jiangbo, the square field, " Fo Ketuo atomic light filter technical research in the radio optical communication system ", " photoelectron laser ", 11 phases of calendar year 2001), but also do not enter commercial stage.
Summary of the invention
Be directed to defective of the prior art, the object of the present invention is to provide receiving system and signal acceptance method thereof in a kind of wireless light communication, native system be a kind of technology maturity height, integrated level height, performance more excellent based on array received, relevant synthetic wireless light communication receiving system structure.
Technical scheme of the present invention is:
A kind of based on array received, relevant synthetic wireless light communication receiving system, it comprises one group of condenser lens, one group of optical fiber or waveguide array, one group of light signal delayer, one group of optical phase modulator, an optical coupler, an optical filter, a photodetector, an analytical calculation control module and decoding sampling judging module.
Described condenser lens is positioned over described optical fiber or waveguide array front end, is used for described optical fiber of spatial light signal focus feed-in or waveguide array.
Each road of described optical fiber or waveguide array is connected with the input of a described light signal delayer respectively;
The output of each described light signal delayer is connected with the input of a described light signal phase-modulator by waveguide or optical fiber;
The output of each described light signal phase-modulator is connected with an input of described optical coupler respectively by waveguide or optical fiber;
The output of described optical coupler is connected with the input of described optical filter by optical fiber or waveguide;
The output of described optical filter is connected with the input of described photodetector by optical fiber or waveguide;
The output of described photodetector is connected with the input of described analytical calculation control module and the input of described decoding sampling judging module by circuit;
The output of described analytical calculation control module is electrically connected with the signal of telecommunication control end of each described light signal delayer, the signal of telecommunication control end of each described optical phase modulator respectively.
Further, described light signal delayer is the true delayer of optical-fibre adjustable or based on the true time delay module of slow light effect.
Further, described light signal phase-modulator is for based on the electrooptic modulator of waveguide or based on the automatically controlled piezoelectric ceramic of the PZT phase controller of really delaying time.
Further, described optical filter is the photonic crystal fiber filter.
Further, the output of described optical filter is connected with an EDFA amplifier by optical fiber or waveguide; Described EDFA amplifier is connected with the input of described photodetector by optical fiber or waveguide.
Receiving system signal acceptance method in a kind of wireless light communication the steps include:
1) adopt one group of condenser lens with in spatial light signal focus feed-in one optical fiber or the waveguide array;
2) phase delay is carried out through a light signal delayer respectively in each road of described optical fiber or waveguide array;
3) with the signal after each road phase delay respectively after a light signal phase-modulator carries out phase modulated coupling be output as one road light signal;
4) light signal after step 3) is handled carries out being converted to after the filtering signal of telecommunication and outputs to a decoding sampling judging module respectively and neutralize in the analytical calculation control module;
5) in communication time slot, described decoding sampling judging module recovers raw information from the signal of telecommunication that receives;
6) in the reference time slot, described analytical calculation control module is carried out feedback regulation to described light signal delayer and described light signal phase-modulator.
Further, described analytical calculation control module with the signal of telecommunication average amplitude that receives as target variable, the control signal of telecommunication of the control signal of telecommunication of light signal delayer in each road and light signal phase-modulator as the regulation and control variable, is carried out feedback regulation to described light signal delayer and described light signal phase-modulator.
Further, the output of described light signal delayer is connected with the input of described light signal phase-modulator by waveguide or optical fiber; The output of the described light signal phase-modulator in each road is connected with an input of same coupler respectively by waveguide or optical fiber.
Further, adopt an optical filter to carry out Filtering Processing, described optical filter is connected with the output of described coupler by waveguide or optical fiber; The output of described optical filter is connected with the input of a photodetector by waveguide or optical fiber, and light signal is converted to the signal of telecommunication.
Further, adopt nested neighborhood optimized Algorithm that described light signal delayer and described light signal phase-modulator are carried out feedback regulation; Described neighborhood optimized Algorithm is for the climbing algorithm or be simulated annealing.
Compared with prior art, the good effect of content of the present invention is:
Adopt of the present inventionly, can be easy to realize high sensitivity, high integration, the easy wireless light communication receiving system of expansion based on array received, relevant synthetic wireless light communication reception programme.It has following advantage:
(1) adopt lens arra to replace adopting in the wireless light communication tradition reception programme beam-capturing mode of big lens, reduced requirement on the one hand to processing technology, thereby reduced cost, level of integrated system and structure flexibility ratio have been improved simultaneously, extensibility is better, can come weight, volume, the quality of reception of regulating system or the like by the scale that increases or reduce array.
In the occasion of spaceborne, carrier-borne wireless light communication, comparatively strict restriction is often arranged for the weight and volume of communication equipment.And adopt independent big visual field condenser lens to carry out beam-capturing in traditional wireless light communication reception programme, need carry out special lens sizes design at specific system requirements.Because light signal is comparatively faint in long haul communication, thus need bigger lens receiving aperture improve the power that receives light signal, required lens sizes even can reach a meter magnitude.To influence light beam imaging phase extent on the CCD detection array owing to the lens shape error simultaneously, thereby influence the tracking aiming control module to coming the counting accuracy of light direction, so the technological level of lens processing is had higher requirement.So in the traditional scheme, high accuracy, bigbore condenser lens make that weight, volume, the cost of system are higher, poor expandability.
After adopting array received scheme of the present invention, owing to adopt lens arra to receive, so each lens can have less receiving area.Because light beam is hunted down and laggardly goes into optical fiber or waveguide and be not used in aerial image, and the self adaptation that can be subjected to light signal delayer, light signal phase-modulator is regulated, so, do not have particular requirement for the shape of each lens except requiring can be with in spatial beam feed-in waveguide or the optical fiber.More than 2 requirements that greatly reduce the lens processing technology, thereby reduced system cost.Simultaneously, because each lens in the array are and work alone, so the performance of single lens can not affect greatly whole system, and can carry out independent replacing, adjustment to each lens, and increase or reduce the array scale, realize the flexible adjustment of system weight, volume, the quality of reception.
(2) adopt array received, relevant synthetic means, superpose, improve the signal to noise ratio of received signal greatly by the consistent of light signal.
Adopt traditional wireless light communication reception programme, promptly adopt single lens that light beam is caught, suppose that total flashlight that can obtain on the receiving plane can be expressed as:
S(t)＝A·C(t)·cos(ωt+β) (1)
Wherein C (t) is the signal of telecommunication that utilizes OOK on-off keying modulation system to be modulated, C (t)=0 or 1.Suppose that the total power signal that can obtain on the receiving area is P, the noise signal that can obtain is n (t), and the noise gross power is P
nSo
And the reception programme that adopts array received of the present invention, is concerned with and synthesizes, suppose that the array scale is N, the array that promptly adopts N lens to form has replaced the single condenser lens in the traditional scheme, ignore the gap between each collimater unit, think that promptly the receiving area that N lens are formed the single condenser lens covering in receiving area that array covered and the traditional scheme equates, the signal light power that can catch of each lens should be so:
P′＝P/N (3)
Then each lens light signal of catching can be expressed as:
S
k(t)＝A
k·C(t+Δt
k)·cos(ωt+β
k)，k＝1，2，3，...，N (4)
The power that obtains of each road optical fiber is so:
Convolution (3) can obtain,
And the noise light signal that each lens is caught is made as n
k(t), power is
P
nk＝P
n/N (7)
Through the adjusting of light phase and signal delay, make each road signal realize the consistent of phase place and signal delay, promptly
S
k(t)＝A
k·C(t+ΔT)·cos(ωt+Δβ) (8)
So, obtain light signal after the process coupler closes the road with each tributary signal
The light signal average power that receives is
And because the randomness and the mutual incoherent characteristic of noise, the synthetic back of the noise signal of each branch road gross power is:
By above derivation as seen, adopt array received of the present invention, relevant synthetic scheme, form the synthetic of light signal that array captures by N lens, synthetic signal light power has improved N doubly than the signal light power that single condenser lens obtained in traditional reception programme, it is constant to keep the received noise light power of noise light power and traditional reception programme after synthetic to compare simultaneously, finally makes signal to noise ratio improve N doubly.
(3) employing is based on the optical filter of optical fiber or waveguide connection, compare with the spatial light filtering device in the traditional wireless light communication reception programme, centre wavelength can not change along with the variation of incident angle on the one hand, can realize narrower bandwidth and the peak transmittance of Geng Gao on the other hand.
The spatial light filtering device that adopts in the conventional wireless optical communication reception programme has types such as interferometric filter, atomic light filter usually.Interference filter chip technology comparative maturity, a lot of commercial products have appearred, shortcoming is that bandwidth (is generally tens nm greatly, minimum reaches 0.2-0.3nm), and atomic light filter also comprises two types---faraday's type anomalous dispersion atomic light filter (Faraday Anomalous Dispersion Optical Filter, be abbreviated as FADOF) and Fo Ketuo anomalous dispersion atomic light filter (Voigt Anomalous Dispersion Optical Filter, be abbreviated as VADOF), equivalent noise bandwidth less (less than 0.01nm), but technology is also immature, still is in the experimental study stage mostly.And another important disadvantages of spatial filtering device is the increase along with the beam incident angle degree, the centre wavelength of filter can be offset, and peak transmittance reduces simultaneously, causes reducing by the signal light power of filter, noise light power increases, signal-to-noise ratio degradation.
Among the present invention, adopt the online optical filter based on optical fiber or waveguide connection, this field correlative study is very ripe, and a large amount of high performance commercial devices occurred.Wherein, the bandwidth of common optical fiber interference type optical filter can reach the 0.1nm magnitude, and utilizes the optical filter of photonic crystal designs even can reach the magnitude of 0.0001nm.Simultaneously,, do not exist the different incidence angles degree to cause the situation of filtering device centre wavelength drift, just do not have the fluctuating of signal power and signal to noise ratio yet because light signal transmits in optical fiber or waveguide.So, employing has more selection in the selection betwixt on the one hand based on the optical filter of optical fiber or waveguide connection, can select the filter that bandwidth is narrower, performance is higher for use, insensitive to the incident angle of spatial beam on the other hand, have better stability.
(4) after condenser lens captures signal, adopt optical fiber or waveguide to carry out optical signal transmission, avoided the unsteadiness of space transmission in the conventional wireless optical communication reception programme.And, make and to utilize various ripe devices to realize the performance of more function and Geng Gao owing to the device correlative study based on optical fiber or waveguide in the optical fiber communication is all very ripe.
In the traditional scheme because after light beam is focused lens and catches, incide on the CCD detection array by telecentric imaging lens, filtering device with the space transmission manner, then require the position and the angle of devices such as lens, filtering device, ccd array to have higher accuracy.And the scheme that the present invention proposes is owing to the mode that adopts " online transmission " such as optical fiber or waveguides, so can realize higher integrated level and stability.Utilize existing WDM device in the optical fiber communication simultaneously, can realize the wavelength division multiplexing of receiving terminal, thereby expand communication frequency, improve bandwidth availability ratio, finally improve traffic rate; And utilize existing EDFA amplifying device, can realize that the faint optical signal of photodetector front end amplifies, thereby improve the receiving sensitivity of system.
Description of drawings
Fig. 1 wireless light communication tradition reception programme schematic diagram;
Wherein the device name that digital number refers among the figure is:
1---condenser lens, 2---the tracking aiming control module, 3---the signal receiving processing module,
4---telecentric imaging lens, 5---narrow band pass filter, 6---CCD face battle array,
7---calculate and control circuit 8---motor-drive circuit, 9---universal joint,
10---photodetector, 11---signal of telecommunication sampling judging module
Fig. 2 wireless light communication array received, relevant synthetic reception programme schematic diagram;
Wherein the device name that digital number refers among the figure is:
21---phase modulator array, 22---light signal delayer array, 23---optical coupler,
24---optical filter, 25---photodetector, 26---analytical calculation and control unit,
27---decoding, sampling, judging module
The time slot map of the light signal that requires in Fig. 3 wireless light communication array received, the relevant synthetic reception programme
Wherein the signal that digital number refers among the figure is:
31---communication time slot, transmission be the light signal that is loaded with raw information
32---adjust time slot, transmission be the light signal that is loaded with periodic square wave signal
Fig. 4 postpones to regulate algorithm flow chart with the nested optimization of phase delay adjustment amount at each tributary signal in array received, the relevant synthetic reception programme based on " climbing " algorithm
The flow chart of internal layer phase optimization adjustment process in the algorithm is regulated in the nested optimization of Fig. 5.
Embodiment
Based on array received, relevant synthetic wireless light communication receiving system structure, for wireless light communication provides a kind of highly sensitive, reception programme that integrated level is high.Its theory structure comprises as shown in Figure 2:
A focusing lens array is coupled into the spatial light signal in optical waveguide array or the fiber array.
Optical waveguide array or fiber array are as the transmission channel of the light signal that receives.The output of described optical waveguide array or fiber array is connected with one group of light signal delayer 21.Described light signal delayer can be for the optical-fibre adjustable of commercialization true delayer, or, be used for the signal delay of each road light signal is regulated based on the true time delay module of slow light effect, make the signal of telecommunication code element basically identical alignment that each road light signal is contained.The output of each road light signal delayer 21 is connected with the input of one group of optical phase modulator 22 by optical fiber or waveguide.Described light signal phase-modulator can be based on the electrooptic modulator of waveguide, the automatically controlled piezoelectric ceramic that also can the be based on PZT phase controller of really delaying time, be used for the signal phase of each road light signal is regulated, make each road light signal can realize the coherent superposition of phase place unanimity.The output of each road phase-modulator is connected with a plurality of inputs of an optical coupler 23 by optical fiber or waveguide.Described optical coupler 23 can be based on waveguide or based on the structure of optical fiber, be used to make each road light signal generating coherent superposition synthetic.The output of described optical coupler 23 is connected with the input of a photodetector 25 by optical fiber or waveguide through optical filter 24.Light signal after described photodetector 25 will synthesize changes the signal of telecommunication into.The output of described photodetector 25 is connected by circuit with the input of signal of telecommunication decoding sampling judging module 27 and calculation control module 26.Described decoding sampling judging module 27 is made of the decoding circuit and the sampling decision circuit of the signal of telecommunication, is used for extracting raw information from the signal of telecommunication of photodetector output.Described analytical calculation control module 26 is made of analysis circuit and control circuit, its output links to each other with the signal of telecommunication control end of each light signal delayer 21 and light signal phase-modulator 22, be used for analyzing and calculating information such as the signal conformance of each road light signal and phase equalization from the signal of telecommunication of photodetector output, generate feedback signal according to result of calculation simultaneously and deliver to light signal delayer 21 and light signal phase-modulator 22, control it and make the delay of each the road light signal phase place and the contained signal of telecommunication reach unanimity.
Array received in the described wireless light communication, relevant synthetic reception programme, wherein the anacom controlling schemes of each the road light signal phase place and contained signal of telecommunication delay is:
One section square-wave cycle signal interts as the reference signal by the time-division mode in emission side in the signal of telecommunication that is transmitted, obtain time-division composite signal as shown in Figure 3, and this signal is modulated on the light signal is transmitted in the free space.The recipient catches and receives this signal.When being in communication time slot, the decoding of receiving system sampling judging module 27 is started working, with the signal of photodetector output decode, sample, processing such as judgement, recover raw information.When being in the time slot of reference signal, the analytical calculation control module 26 of receiving system is started working, each road reference optical signal is closed the average power of gained light signal behind the road, that is photodetector output signal average amplitude is as target variable, with the control signal of telecommunication of each light signal delayer and light signal phase-modulator as the regulation and control variable, carry out feedback regulation by nested neighborhood optimized Algorithm, make the delay of each road light signal and phase place reach unanimity.Neighborhood optimized Algorithm wherein can be taked " climbing " algorithm, perhaps fast algorithm such as simulated annealing.Wherein based on the nested optimized Algorithm of " climbing " algorithm shown in Fig. 4 flow chart, so-called " nested " is meant that the step of the 5th in this optimized Algorithm---each road this process of light signal phase adjusted itself also is the process that " climbing " optimized, and its concrete steps are shown in the flow chart among Fig. 5.By the continuous feedback regulation of analytical calculation control module in the reference signal time slot, make receiving system can be adapted to the wavefront shape of current incident, guarantee that each road light signal can coherent superposition, the contained signal of telecommunication can consistently synthesize on each road light signal simultaneously.
Claims (10)
1. the receiving system in the wireless light communication is characterized in that comprising one group of condenser lens, one group of optical fiber or waveguide array, one group of light signal delayer, one group of optical phase modulator, an optical coupler, an optical filter, a photodetector, an analytical calculation control module and decoding sampling judging module; Wherein,
Described condenser lens is positioned over described optical fiber or waveguide array front end, is used for described optical fiber of spatial light signal focus feed-in or waveguide array;
Each road of described optical fiber or waveguide array is connected with the input of a described light signal delayer respectively;
The output of each described light signal delayer is connected with the input of a described light signal phase-modulator by waveguide or optical fiber;
The output of each described light signal phase-modulator is connected with an input of described optical coupler respectively by waveguide or optical fiber;
The output of described optical coupler is connected with the input of described optical filter by optical fiber or waveguide;
The output of described optical filter is connected with the input of described photodetector by optical fiber or waveguide;
The output of described photodetector is electrically connected with the input of described analytical calculation control module and the input of described decoding sampling judging module respectively;
The output of described analytical calculation control module is electrically connected with the signal of telecommunication control end of each described light signal delayer, the signal of telecommunication control end of each described optical phase modulator respectively.
2. the system as claimed in claim 1 is characterized in that described light signal delayer is the true delayer of optical-fibre adjustable or based on the true time delay module of slow light effect.
3. the system as claimed in claim 1 is characterized in that described light signal phase-modulator is for based on the electrooptic modulator of waveguide or based on the automatically controlled piezoelectric ceramic of the PZT phase controller of really delaying time.
4. the system as claimed in claim 1 is characterized in that described optical filter is the photonic crystal fiber filter.
5. the system as claimed in claim 1 is characterized in that the output of described optical filter is connected with an EDFA amplifier by optical fiber or waveguide; Described EDFA amplifier is connected with the input of described photodetector by optical fiber or waveguide.
6. the receiving system signal acceptance method in the wireless light communication the steps include:
1) adopt one group of condenser lens with in spatial light signal focus feed-in one optical fiber or the waveguide array;
2) phase delay is carried out through a light signal delayer respectively in each road of described optical fiber or waveguide array;
3) with the signal after each road phase delay respectively after a light signal phase-modulator carries out phase modulated coupling be output as one road light signal;
4) light signal after step 3) is handled carries out being converted to after the filtering signal of telecommunication and outputs to a decoding sampling judging module respectively and neutralize in the analytical calculation control module;
5) in communication time slot, described decoding sampling judging module recovers raw information from the signal of telecommunication that receives;
6) in the reference time slot, described analytical calculation control module is carried out feedback regulation to described light signal delayer and described light signal phase-modulator.
7. method as claimed in claim 6, it is characterized in that described analytical calculation control module with the signal of telecommunication average amplitude that receives as target variable, the control signal of telecommunication of the control signal of telecommunication of light signal delayer in each road and light signal phase-modulator as the regulation and control variable, is carried out feedback regulation to described light signal delayer and described light signal phase-modulator.
8. as claim 6 or 7 described methods, it is characterized in that the output of described light signal delayer is connected with the input of described light signal phase-modulator by waveguide or optical fiber; The output of the described light signal phase-modulator in each road is connected with an input of same coupler respectively by waveguide or optical fiber.
9. method as claimed in claim 8 is characterized in that adopting an optical filter to carry out Filtering Processing, and described optical filter is connected with the output of described coupler by waveguide or optical fiber; The output of described optical filter is connected with the input of a photodetector by waveguide or optical fiber, and light signal is converted to the signal of telecommunication.
10. as claim 6 or 7 described methods, it is characterized in that adopting nested neighborhood optimized Algorithm that described light signal delayer and described light signal phase-modulator are carried out feedback regulation; Described neighborhood optimized Algorithm is for the climbing algorithm or be simulated annealing.
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