CN100571076C - ultraviolet light communication system - Google Patents
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- CN100571076C CN100571076C CNB2006101162649A CN200610116264A CN100571076C CN 100571076 C CN100571076 C CN 100571076C CN B2006101162649 A CNB2006101162649 A CN B2006101162649A CN 200610116264 A CN200610116264 A CN 200610116264A CN 100571076 C CN100571076 C CN 100571076C
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- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- BKZJXSDQOIUIIG-UHFFFAOYSA-N argon mercury Chemical compound [Ar].[Hg] BKZJXSDQOIUIIG-UHFFFAOYSA-N 0.000 description 1
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Abstract
An ultraviolet communication system is composed of emitting end and receiving end, and is a multi-channel ultraviolet communication system composed of ultraviolet lamp, lens, volume grating, reflector, narrow-band ultraviolet filter, polarizing beam splitter, electrooptical crystal and photomultiplier. The invention can realize non-direct-view type day-blind waveband multi-channel ultraviolet communication, high-capacity channel ultraviolet communication or one-point-to-multipoint communication.
Description
Technical field
The present invention relates to the atmosphere ultraviolet communication, proposed a kind of ultra-violet optical communication system.
Background technology
The means of communication of people's grasp at present comprises that radio communication, microwave communication, wire communication and optical fiber communication etc. are several.Radio and microwave communication confidentiality are not high, and the electromagnetic wave that they send can disturbed, monitoring on far ground.Wire communication and optical fiber communication need lay transmission line in advance, and incompatibility needs flexible, motor-driven and rapid-action operational commanding occasion.Infrared laser communication in recent years obtains development faster, and it has the advantage of transmission rate height, anti-interference and good confidentiality.But it is a kind of horizon communication means, can only realize point-to-point communication, if there is the barrier block communication to interrupt, and needs accurately aiming to guarantee the communication link operate as normal.
The ultraviolet light information transmission technology is a kind of brand-new information transmission technology, because there be " day blind area " in ultraviolet light at near-earth low latitude atmosphere and in low airborne strong absorption and scattering process, makes it can realize short distance, safe, secret communication.
The ultraviolet light message transmission has following distinguishing feature:
(1) high confidentiality: ultraviolet light is subjected to the strong effect of atmospheric molecule, aerocolloidal atmospheric attenuation in transmission course, and energy attenuation is very fast, outside communication distance, uses ultraviolet detector to eavesdrop.Because atmospheric scattering is difficult to judge transmitter site from scattered signal.
(2) all weather operations: because ultraviolet system source spectrum works in a day blind area (200-280nm), thus in the atmosphere of near-earth low latitude, there is not this band spectrum, so can all weather operations.
(3) anti-interference: the ozone molecule in the atmosphere has strong absorption to the ultraviolet composition in the sunlight on the one hand; On the other hand, ultraviolet light is not influenced by electromagnetic wave, so the enemy is difficult to disturb.
(4) comprehensive property: use the ultraviolet source of dispersing in the ultraviolet light transmission system, can finish a bit to multicast communication.And utilize the scattering effect of ultraviolet light, can overcome various terrain obstructions.
Because so many advantages of ultraviolet light, the researcher has developed following several ultra-violet optical communication systems:
(1) is light source with the low pressure mercury lamp, on the low speed carrier signal, carries out the ultra-violet optical communication system of frequency modulation transferring voice.Light source uses low pressure mercury lamp, and receiving terminal uses a day blind type photomultiplier to add colour filter, the voice signal that frequency of utilization modulation transmissions 4k is following.
(2) ultra-violet optical communication system of low speed digital signal transmission.With the deuterium lamp is light source, and receiving terminal uses a day blind type photomultiplier to add colour filter, transmits digital signal with frequency shift keying (FSK) modulation.
(3) be the ultra-violet optical communication system of light source with ultraviolet light-emitting diode (LED).Receiving terminal adopts a day blind type photomultiplier to add colour filter equally, and modulation system is taked the pulse position modulation modulation.
(4) with the mercury argon lamp be the ultra-violet optical communication system of light source.Receive blind type photomultiplier of the first day of the lunar year and add colour filter, modulation system directly adopts on-off keying (OOK).
No matter above-mentioned ultra-violet optical communication system is to transmit voice or digital signal, transmission rate all is lower, and just communication channel capacity is smaller, and all can not carry out multichannel communication simultaneously.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of ultra-violet optical communication system is provided, it has multichannel or big capacity channels, in the hope of promoting the development of ultraviolet communication.
Technical solution of the present invention is as follows:
A kind of ultra-violet optical communication system is made of transmitting terminal and receiving terminal, it is characterized in that:
Described transmitting terminal comprises n road signal, and wherein n is 〉=2 positive integer, a wave band of the corresponding corresponding ultraviolet light of each road signal; In addition with the high-pressure mercury lamp of reflector, output light direction along this high-pressure mercury lamp has the convergence convex lens successively, the collimating lens and first grating, direction in each band of light angle of emergence of first grating is placed first speculum of each light path, the spike interference filter and the polarization spectroscope of corresponding wave band are set in the reverberation direction of each speculum, second speculum that each light path is arranged in the reverberation direction of each polarization spectroscope, reverberation direction at each second speculum is first electrooptic crystal of each light path, first analyzer is second electrooptic crystal and second analyzer of each light path in the transmitted light direction of the polarization spectroscope of described each light path.
Described receiving terminal, big field-of-view lens is arranged successively receiving light direction, the collimating lens and second grating are placed the speculum of each light path successively in the direction of each band of light angle of emergence of second grating, spike interference filter, photomultiplier and the pulse position modulation decoder of corresponding each wave band.
In the described transmitting terminal, described n road signal is exported by signal resolver, in the described receiving terminal, a signal recombiner is set behind the pulse position modulation decoder on described each light path.
Back at 2n described analyzer is equipped with reverberation respectively towards different speculums.
A kind of ultra-violet optical communication system is made of transmitting terminal and receiving terminal, it is characterized in that:
Described transmitting terminal comprises n road signal, a wave band of the corresponding corresponding ultraviolet light of each road signal; The high-pressure mercury lamp that also has n band reflector, each high-pressure mercury lamp uses different wave bands, output light direction along each high-pressure mercury lamp has the convergence convex lens successively, collimating lens, the spike interference filter and the polarization spectroscope of corresponding each different-waveband are set in each collimating lens back again, reverberation direction at each polarization spectroscope has speculum, in the reverberation direction of speculum is first electrooptic crystal and first analyzer of each light path of each road signal modulation, is second electrooptic crystal and second analyzer of each light path of each road signal modulation in the transmitted light direction of the polarization spectroscope of described each road signal;
Described receiving terminal, from receiving light direction big field-of-view lens is arranged successively, collimating lens and grating are placed the speculum of each light path, spike interference filter, photomultiplier and the pulse position modulation decoder of corresponding each wave band successively in the direction of each band of light angle of emergence of grating.
The span of described n is: 2,3,4.
Total n road signal demand transmits simultaneously.(spectrum is about 220nm～600nm) emit with nearly directional light to high-pressure mercury lamp with wide wavestrip ultraviolet light through reflector, convex lens are assembled it, becoming thin collimated light beam by collimating lens again emits, through grating beam splitting, to form continuous spectrum behind grating distributes, with 10nm～20nm is a wave band, and the ultraviolet light of 220nm～280nm is divided into n wave band.Place first speculum of each light path in the direction of each band of light angle of emergence, allow the most light of this wave band enter each spike interference filter by first speculum of this light path, the logical optical range of filter is identical with the first wave band ultraviolet light range, the light that sees through enters the polarization spectroscope on each light path again, the polarization direction is that each polarization spectroscope of light transmission of x direction enters second electrooptic crystal of each light path, the polarization direction is that the light of y direction then reflexes on second speculum of each light path, reflection once enters each first electrooptic crystal again, two electrooptic crystals of each light path are subjected to corresponding each road voltage signal to carry out longitudinal strength to modulate simultaneously, export by each first analyzer through the light of each first electrooptic crystal afterwards, through each second analyzer output of light process of each second electrooptic crystal.The ultraviolet light that 2n bundle different-waveband is modulated through unlike signal enters atmospheric channel together and launches in the same direction.
At receiving terminal, the approximate parallel light that receives enters big field-of-view lens and receives, and through focusing on and becoming thin collimated light beam output by collimating lens, incides the ultraviolet light that is divided into n wavestrip on the grating through beam split.The ultraviolet light of each wave band enters corresponding each spike interference filter by the speculum on each light path, the photomultiplier that enters each light path by the light behind the filter reverts to each road pulse position modulation signal, enter each pulse position modulation decoder again, revert to former each road signal of transmitting terminal.
At the transmitting terminal of described ultra-violet optical communication system, described n road signal can be exported by signal resolver, in the described receiving terminal, a signal recombiner is set behind the pulse position modulation decoder on described each light path, can pass high speed signal like this.Its specific practice is at transmitting terminal, at first one road high speed signal is resolved into n (2,3 or 4) road by the electricity means, each frame that is about to signal is divided into n part, (1≤k≤n) part proposes and is combined into the low speed signal that speed is original signal n/one the k of each frame, again every road low speed baseband signal is carried out pulse position modulation (ppm), form respectively first and second ... n road signal, this n road signal will carry out the pulse position modulation of continuous light.At receiving terminal, will send into the signal recombiner by the n road low speed signal that each pulse position modulation decoder demodulation is come out, its operation principle is just in time opposite with signal resolver, finally reverts to former high speed signal.
Described ultra-violet optical communication system, if be equipped with reverberation respectively towards different speculums in the back of 2n analyzer, can allow n road signal not from same direction emission, it promptly not the multichannel communication that carries out point-to-point, but launch from n different directions, can realize a bit arriving the communication of multiple spot.
Described ultra-violet optical communication system, if remove the grating of its transmitting terminal, do not use grating beam splitting, but use n light source simultaneously, each light source is used an one wave band, launch from a direction concentrating again, so just can obtain bigger transmitting power, and communication distance also can obtain increase through the light of n wave band of ovennodulation.
Technique effect of the present invention shows:
(1) ultra-violet optical communication system of the present invention's realization can be realized the multichannel ultraviolet communication of the non-solar-blind band of non-direct viewing type.
(2) ultra-violet optical communication system realized of the present invention has been carried out pulse position modulation modulation to the ultraviolet band continuous light to the light of different frequency after the ultraviolet light beam split.
(3) ultra-violet optical communication system of the present invention's realization, when each road signal of its transmitting terminal is to be told through signal resolver by a high speed signal, and when receiving terminal will be combined into former high speed signal by a signal recombiner again by each road signal of pulse position modulation decoder output, can realize the ultraviolet communication of big capacity channels.
(4) ultra-violet optical communication system of the present invention's realization, when the back at each analyzer is equipped with reverberation respectively towards different speculums, can allow each road signal not from same direction emission, it promptly not the multichannel communication that carries out point-to-point, but launch from each different directions, can realize a bit arriving the communication of multiple spot.
(5) ultra-violet optical communication system of the present invention's realization, if do not use grating beam splitting, but use a plurality of light sources simultaneously, each light source is used an one wave band, launch from a direction concentrating again through the light of a plurality of wave bands of ovennodulation, so just bigger transmitting power can be obtained, longer-distance multichannel ultraviolet communication can be realized.
Description of drawings
Fig. 1 is the transmitting terminal schematic diagram of ultra-violet optical communication system of the present invention.
Fig. 2 is the receiving terminal schematic diagram of ultra-violet optical communication system of the present invention.
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing, but should not limit protection scope of the present invention with this.
See also Fig. 1 earlier, Fig. 1 is the transmitting terminal schematic diagram of ultra-violet optical communication system of the present invention.
Embodiment 1:
N gets 2, and the two paths of signals that pass is respectively the first via signal 91 and the second road signal 92.
Described transmitting terminal comprises the high-pressure mercury lamp 1 that has reflector, along the output light direction of this high-pressure mercury lamp 1 convex lens 2, collimating lens 3 and first grating 4 of convergence is arranged successively, in these first grating, 4 backs:
Direction in the first band of light angle of emergence of this first grating 4 is placed first speculum 51, reverberation direction at this first speculum 51 is provided with first spike interference filter 61 and first polarization spectroscope 712, the reverberation direction of this first polarization spectroscope 712 has second speculum 711, reverberation direction at this second speculum 711 is first electrooptic crystal 811, first analyzer 1011, is second electrooptic crystal 812, second analyzer 1012 in the transmitted light direction of described first polarization spectroscope 712;
Direction in the second band of light angle of emergence of this first grating 4 is placed the 3rd speculum 52, reverberation direction at the 3rd speculum 52 is provided with second spike interference filter 62 and second polarization spectroscope 722, the reverberation direction of this second polarization spectroscope 722 has the 4th speculum 721, reverberation direction at the 4th speculum 721 is the 3rd electrooptic crystal 821, the 3rd analyzer 1021, is the 4th electrooptic crystal 822, the 4th analyzer 1022 in the transmitted light direction of described second polarization spectroscope 13;
See also Fig. 2, Fig. 2 is the receiving terminal schematic diagram of ultra-violet optical communication system of the present invention.Described receiving terminal has big field-of-view lens 12 successively at the reception light direction, the collimating lens 13 and second grating 14, in these second grating, 14 backs:
Direction in the first band of light angle of emergence of this second grating 14 is placed the 5th speculum 151, reverberation direction at the 5th speculum 151 sets gradually the 3rd spike interference filter 161, the first photomultipliers 171 and the first pulse position modulation decoder 181;
Direction in the second band of light angle of emergence of this second grating 14 is placed the 6th speculum 152, reverberation direction at the 6th speculum 152 sets gradually the 4th spike interference filter 162, the second photomultipliers 172 and the second pulse position modulation decoder 182.
(spectrum is about 220nm～600nm) emit with nearly directional light with wide wavestrip ultraviolet light through reflector for high-pressure mercury lamp 1, convex lens 2 are with its convergence, becoming thin collimated light beam by collimating lens 3 again emits, through grating 4 beam split, to form continuous spectrum behind grating 4 distributes, with 30nm is a wave band, and the ultraviolet light of 220nm～280nm is divided into 2 wave bands.Place first speculum 51 in the direction of the first band of light angle of emergence, allow the most light of 220～250nm enter first spike interference filter 61 by first speculum 51, first filter, 61 logical optical ranges are identical with the first wave band ultraviolet light range, the light that sees through enters first polarization spectroscope 712 again, the polarization direction is that the light transmission polarization spectroscope 712 of x direction enters second electrooptic crystal 812, the polarization direction is that the light of y direction then reflexes on second speculum 711, reflection once enters first electrooptic crystal 811 again, two electrooptic crystals are subjected to first via voltage signal 91 to carry out longitudinal strength to modulate simultaneously, export by first analyzer 1011 through the light of first electrooptic crystal 811 afterwards, export through second analyzer 1012 through the light of second electrooptic crystal 812.
Place the 3rd speculum 52 in the direction of the second band of light angle of emergence behind the grating, allow the most light of 250～280nm enter second spike interference filter 62 by the 3rd speculum 52, second filter, 62 logical optical ranges are identical with the second wave band ultraviolet light range, the light that sees through enters second polarization spectroscope 722 again, the polarization direction is that the light transmission polarization spectroscope 722 of x direction enters the 4th electrooptic crystal 822, the polarization direction is that the light of y direction then reflexes on the 3rd speculum 721, reflection once enters the 3rd electrooptic crystal 821 again, two electrooptic crystals are subjected to the second road voltage signal 92 to carry out longitudinal strength to modulate simultaneously, export by the 3rd analyzer 1021 through the light of the 3rd electrooptic crystal 821 afterwards, export through the 4th analyzer 1022 through the light of the 4th electrooptic crystal 822.The ultraviolet light that this four bundles different frequency is modulated through unlike signal enters atmospheric channel together and launches in the same direction.
At receiving terminal, the approximate parallel light that receives enters big field-of-view lens 12 and receives, and through focusing on and becoming thin collimated light beam output by collimating lens 13, incides the ultraviolet light that is divided into 2 wavestrips on the grating 14 through beam split.220～250nm ultraviolet light enters the 3rd spike interference filter 161 by the 5th speculum, enter first photomultiplier 171 by the light behind the filter 161 and revert to first via pulse position modulation signal, enter the first pulse position modulation decoder 181 again, revert to the first via signal of transmitting terminal.
250～280nm ultraviolet light enters the 4th spike interference filter 152 by the 6th speculum, enter second photomultiplier 172 by the light behind the filter 152 and revert to the second road pulse position modulation signal, enter the second pulse position modulation decoder 182 again, revert to the second road signal of transmitting terminal.
When n got 3, what will transmit at transmitting terminal was respectively first via signal 91, the second road signal 92 and Third Road signal 93.
Described transmitting terminal has the high-pressure mercury lamp 1 of reflector, along the output light direction of this high-pressure mercury lamp 1 convex lens 2, collimating lens 3 and first grating 4 of convergence is arranged successively, in these first grating, 4 backs:
Direction in the first band of light angle of emergence of this first grating 4 is placed first speculum 51, reverberation direction at this first speculum 51 is provided with first spike interference filter 61 and first polarization spectroscope 712, the reverberation direction of this first polarization spectroscope 712 has second speculum 711, reverberation direction at this second speculum 711 is first electrooptic crystal 811, first analyzer 1011, is second electrooptic crystal 812, second analyzer 1012 in the transmitted light direction of described first polarization spectroscope 712;
Direction in the second band of light angle of emergence of this first grating 4 is placed the 3rd speculum 52, reverberation direction at the 3rd speculum 52 is provided with second spike interference filter 62 and second polarization spectroscope 722, the reverberation direction of this second polarization spectroscope 722 has the 4th speculum 721, reverberation direction at the 4th speculum 721 is the 3rd electrooptic crystal 821, the 3rd analyzer 1021, is the 4th electrooptic crystal 822, the 4th analyzer 1022 in the transmitted light direction of described second polarization spectroscope 13;
Direction in the 3rd band of light angle of emergence of this first grating 4 is placed the 5th speculum 53, reverberation direction at the 5th speculum 53 is provided with the 3rd spike interference filter 63 and the 3rd polarization spectroscope 732, reverberation direction at the 3rd polarization spectroscope 732 has the 6th speculum 731, reverberation direction at the 6th speculum 731 is the 5th electrooptic crystal 831, the 5th analyzer 1031, is the 6th electrooptic crystal 832, the 6th analyzer 1032 in the transmitted light direction of described the 3rd polarization spectroscope 732;
Described receiving terminal has big field-of-view lens 12 successively at the reception light direction, the collimating lens 13 and second grating 14, in these second grating, 14 backs:
Direction in the first band of light angle of emergence of this second grating 14 is placed the 7th speculum 151, reverberation direction at the 7th speculum 151 sets gradually the 4th spike interference filter 161, the first photomultipliers 171 and the first pulse position modulation decoder 181;
Direction in the second band of light angle of emergence of this second grating 14 is placed the 8th speculum 152, reverberation direction at the 8th speculum 152 sets gradually the 5th spike interference filter 162, the second photomultipliers 172 and the second pulse position modulation decoder 182;
Direction in the triband light angle of emergence of this second grating 14 is placed the 9th speculum 153, reverberation direction at the 9th speculum 153 sets gradually the 6th spike interference filter 163, the three photomultipliers 173 and the 3rd pulse position modulation decoder 183.
(spectrum is about 220nm～600nm) emit with nearly directional light with wide wavestrip ultraviolet light through reflector for high-pressure mercury lamp 1, convex lens 2 are with its convergence, becoming thin collimated light beam by collimating lens 3 again emits, through grating 4 beam split, to form continuous spectrum and distribute behind grating 4, be a wave band with 20nm, and the ultraviolet light of 220nm～280nm is divided into 3 wave bands, be respectively 220～240nm, 240～260nm and 260～280nm.Place first speculum 51 in the direction of the first band of light angle of emergence, allow the most light of 220～240nm enter first spike interference filter 61 by first speculum 51, first filter, 61 logical optical ranges are identical with the first wave band ultraviolet light range, the light that sees through enters first polarization spectroscope 712 again, the polarization direction is that the light transmission polarization spectroscope 712 of x direction enters second electrooptic crystal 812, the polarization direction is that the light of y direction then reflexes on second speculum 711, reflection once enters first electrooptic crystal 811 again, two electrooptic crystals are subjected to first via voltage signal 91 to carry out longitudinal strength to modulate simultaneously, export by first analyzer 1011 through the light of first electrooptic crystal 811 afterwards, export through second analyzer 1012 through the light of second electrooptic crystal 812.
Place the 3rd speculum 52 in the direction of the second band of light angle of emergence behind the grating, allow the most light of 240～260nm enter second spike interference filter 62 by the 3rd speculum 52, second filter, 62 logical optical ranges are identical with the second wave band ultraviolet light range, the light that sees through enters second polarization spectroscope 722 again, the polarization direction is that the light transmission polarization spectroscope 722 of x direction enters the 4th electrooptic crystal 822, the polarization direction is that the light of y direction then reflexes on the 3rd speculum 721, reflection once enters the 3rd electrooptic crystal 821 again, two electrooptic crystals are subjected to the second road voltage signal 92 to carry out longitudinal strength to modulate simultaneously, export by the 3rd analyzer 1021 through the light of the 3rd electrooptic crystal 821 afterwards, export through the 4th analyzer 1022 through the light of the 4th electrooptic crystal 822.
Place the 5th speculum 53 in the direction of the triband light angle of emergence behind the grating, allow the most light of 240～260nm enter the 3rd spike interference filter 63 by the 3rd speculum 53, the 3rd filter 63 logical optical ranges are identical with the triband ultraviolet light range, the light that sees through enters the 3rd polarization spectroscope 732 again, the polarization direction is that the light transmission polarization spectroscope 732 of x direction enters the 6th electrooptic crystal 832, the polarization direction is that the light of y direction then reflexes on the 6th speculum 731, reflection once enters the 5th electrooptic crystal 831 again, two electrooptic crystals are subjected to the second road voltage signal 93 to carry out longitudinal strength to modulate simultaneously, export by the 5th analyzer 1031 through the light of the 5th electrooptic crystal 831 afterwards, export through the 4th analyzer 1032 through the light of the 6th electrooptic crystal 832.The ultraviolet light that this six bundles different frequency is modulated through unlike signal enters atmospheric channel together and launches in the same direction.
At receiving terminal, the approximate parallel light that receives enters big field-of-view lens 12 and receives, and through focusing on and becoming thin collimated light beam output by collimating lens 13, incides the ultraviolet light that is divided into 2 wavestrips on the grating 14 through beam split.220～240nm ultraviolet light enters the 4th spike interference filter 161 by the 7th speculum, enter first photomultiplier 171 by the light behind the filter 161 and revert to first via pulse position modulation signal, enter the first pulse position modulation decoder 181 again, revert to the first via signal of transmitting terminal.
240～260nm ultraviolet light enters the 5th spike interference filter 152 by the 8th speculum, enter second photomultiplier 172 by the light behind the filter 152 and revert to the second road pulse position modulation signal, enter the second pulse position modulation decoder 182 again, revert to the second road signal of transmitting terminal.
260～280nm ultraviolet light enters the 6th spike interference filter 153 by the 9th speculum, enter second photomultiplier 173 by the light behind the filter 153 and revert to the Third Road pulse position modulation signal, enter the 3rd pulse position modulation decoder 183 again, revert to the Third Road signal of transmitting terminal.
Embodiment 3
At the transmitting terminal of described ultra-violet optical communication system, described 3 road signals can be exported by signal resolver, in the described receiving terminal, a signal recombiner are set behind the pulse position modulation decoder on described each light path, can pass high speed signal like this.Its specific practice is at transmitting terminal, at first one road high speed signal is resolved into 3 the tunnel by the electricity means, each frame that is about to signal is divided into 3 parts, the k of each frame (1≤k≤3) part is proposed and is combined into the low speed signal that speed is original signal 1/3rd, again every road low speed baseband signal is carried out pulse position modulation (ppm), form first, second and third road signal respectively, this 3 road signal will carry out the pulse position modulation of continuous light.At receiving terminal, will send into the signal recombiner by 3 road low speed signals that each pulse position modulation decoder demodulation is come out, its operation principle is just in time opposite with signal resolver, finally reverts to former high speed signal.
Embodiment 4
Described ultra-violet optical communication system, if be equipped with reverberation respectively towards different speculums in the back of 6 analyzers, can allow 3 road signals not from same direction emission, it promptly not the multichannel communication that carries out point-to-point, but launch from 3 different directions, can realize a bit arriving the communication of multiple spot.
Embodiment 5
Described ultra-violet optical communication system, if remove the grating of its transmitting terminal, do not use grating beam splitting, but use 3 light sources simultaneously, each light source is used an one wave band, launch from a direction concentrating again, so just can obtain bigger transmitting power, and communication distance also can obtain increase through the light of 3 wave bands of ovennodulation.
Claims (4)
1, a kind of ultra-violet optical communication system is made of transmitting terminal and receiving terminal, it is characterized in that:
Described transmitting terminal comprises n road signal, and wherein n is 〉=2 positive integer, and each road signal is corresponding to a wave band of ultraviolet light; In addition with the high-pressure mercury lamp of reflector, output light direction along this high-pressure mercury lamp has the convergence convex lens successively, the collimating lens and first grating, direction in each band of light angle of emergence of first grating is placed first speculum of each light path, the spike interference filter and the polarization spectroscope of corresponding wave band are set in the reverberation direction of each speculum, second speculum that each light path is arranged in the reverberation direction of each polarization spectroscope, reverberation direction at each second speculum is first electrooptic crystal of each light path, first analyzer is second electrooptic crystal and second analyzer of each light path in the transmitted light direction of the polarization spectroscope of described each light path;
Described receiving terminal, from receiving light direction big field-of-view lens is arranged successively, the collimating lens and second grating are placed the speculum of each light path, spike interference filter, photomultiplier and the pulse position modulation decoder of corresponding each wave band successively in the direction of each band of light angle of emergence of second grating.
2, ultra-violet optical communication system according to claim 1, it is characterized in that in the described transmitting terminal, described n road signal is exported by signal resolver, in the described receiving terminal, a signal recombiner is set behind the pulse position modulation decoder on described each light path.
4, ultra-violet optical communication system according to claim 1 is characterized in that being equipped with reverberation respectively towards different speculums in the back of 2n described analyzer.
5,, it is characterized in that the span of described n is: 2,3,4 according to each described ultra-violet optical communication system of claim 1 to 4.
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| CNB2006101162649A CN100571076C (en) | 2006-09-20 | 2006-09-20 | ultraviolet light communication system |
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| CN101986578A (en) * | 2009-07-29 | 2011-03-16 | 中国科学院空间科学与应用研究中心 | Ultraviolet communication system in free atmosphere |
| CN102215542A (en) * | 2011-06-07 | 2011-10-12 | 西安理工大学 | Communication method of ultraviolet light wireless sensor network |
| CN102638309A (en) * | 2012-03-21 | 2012-08-15 | 北京邮电大学 | Ultraviolet light communication method and transmitter |
| CN102801474A (en) * | 2012-08-21 | 2012-11-28 | 中国人民解放军国防科学技术大学 | Polarization-based signal modulation and demodulation method in ultraviolet communication |
| CN102904637A (en) * | 2012-09-28 | 2013-01-30 | 北京邮电大学 | Space optical communication method and system based on ultraviolet light transmission |
| CN103569372B (en) * | 2013-10-12 | 2015-08-26 | 西安理工大学 | Machine aided of going straight up to based on wireless ultraviolet light falls system and helps and falls method |
| CN112436890A (en) * | 2020-11-12 | 2021-03-02 | 广东科学技术职业学院 | Ultraviolet light communication system applied to ship |
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| CN1554929A (en) * | 2003-12-29 | 2004-12-15 | 暨南大学 | Double spectrum image detector |
| WO2006033018A2 (en) * | 2004-09-20 | 2006-03-30 | Excem | Transmitting device for free-space optical transmission |
| CN200973093Y (en) * | 2006-09-20 | 2007-11-07 | 中国科学院上海光学精密机械研究所 | Ultraviolet light communication system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1554929A (en) * | 2003-12-29 | 2004-12-15 | 暨南大学 | Double spectrum image detector |
| WO2006033018A2 (en) * | 2004-09-20 | 2006-03-30 | Excem | Transmitting device for free-space optical transmission |
| CN200973093Y (en) * | 2006-09-20 | 2007-11-07 | 中国科学院上海光学精密机械研究所 | Ultraviolet light communication system |
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