CN101986579A - Day blind ultraviolet laser communication system in free space - Google Patents
Day blind ultraviolet laser communication system in free space Download PDFInfo
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- CN101986579A CN101986579A CN2009100901558A CN200910090155A CN101986579A CN 101986579 A CN101986579 A CN 101986579A CN 2009100901558 A CN2009100901558 A CN 2009100901558A CN 200910090155 A CN200910090155 A CN 200910090155A CN 101986579 A CN101986579 A CN 101986579A
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Abstract
The invention provides a day blind ultraviolet laser communication system in free space. The system is characterized by comprising an emitting terminal and a receiving terminal, wherein the emitting terminal comprises a day blind ultraviolet laser and a diverging lens; the light emitted by the ultraviolet laser passes through the diverging lens so that the signal light is scattered in a certain diverging angle; the receiving terminal comprises one or multiple ultraviolet detectors, wherein the ultraviolet detector comprises a day blind type band-pass ultraviolet filter, a photomultiplier and a photo detector bracket; received light signals are converted into electric signals by the photomultiplier after being filtered and denoised through the day blind type band-pass ultraviolet filter; and then the information is restored through an amplification and filter demodulator circuit arranged on the back end so as to realize non-sight distance point-to-point or point-to-multipoint broadcast model communication. he day blind ultraviolet laser communication system, the ultraviolet laser is adopted as an emitting light source, the diverging lens is arranged at the light outlet of the ultraviolet laser, and the transmission distance is long, the receiving terminal has simple structure and small volume, and the day blind ultraviolet laser communication system has portability and strong maneuverability.
Description
Technical field
The present invention relates to a kind of optical communication technique of Ultra-Violet Laser, especially relate to blind Ultra-Violet Laser communication system of a kind of free space day.
Background technology
Develop at present faster that free space optical communication mainly is infrared laser communication, compare with microwave communication, radio communication, the confidentiality and the anti-interference of infrared laser communication are relatively good.But the disadvantage of infrared laser communication can only realize point-to-point horizon communication exactly, if there is barrier to stop between communication line, its communication will be interrupted.And the free space ultraviolet communication of more and more being noted by people in recent years can either realize that horizon communication also can realize non line of sight communication, has remedied the deficiency of infrared laser communication.
Because ultraviolet light has stronger scattering process when transmitting in free atmosphere, thereby can propagate in non-directional mode, promptly can the cut-through thing and realize non line of sight communication.Ultraviolet communication is to utilize the carrier of the ultraviolet light wave of " day is blind " wave band as information, is transmission medium with the atmosphere, can realize based on point-to-point or some communication to multiple spot (broadcast mode) in the local scope.Ultraviolet light is used to communicate by letter and has many advantages.Low eavesdropping rate, low level are debated rate, strong interference immunity, comprehensive property, all weather operations etc., and the non-direct-view of ultraviolet communication can be described as the ultraviolet communication the most outstanding advantage of other communications of comparing.
Summary of the invention
The object of the present invention is to provide blind Ultra-Violet Laser communication system of a kind of novel free space day.It utilizes the scattering process of ultraviolet light, is implemented in point-to-point in the free space or a bit to non line of sight ultraviolet communication of multiple spot by simple structure.
Free space day of the present invention, blind Ultra-Violet Laser communication system was made of transmitting terminal and receiving terminal two parts.(ultraviolet laser of 200nm～280nm) and divergent lens constitute described transmitting terminal by non-solar-blind band, described receiving terminal is made of one or more UV-detector, detection by a plurality of photodetectors receives, and realizes point-to-point or some non line of sight ultraviolet communication to multiple spot.
Wherein, the divergent lens of described transmitting terminal is placed in the light-emitting window place of described ultraviolet laser, can adopt the ultraviolet lens of various materials such as ultraviolet melten glass.Ultraviolet laser adopts the internal modulation mode as the light source of the information of transmission, and angle can freely be controlled.The light that described ultraviolet laser sends is earlier through described divergent lens, make flashlight be launched (considering that generally divergence half-angle is about 5 °～15 °) with bigger dispersion angle, in atmospheric channel, light is mainly propagated with the form of scattering, and the launching elevation of transmitting terminal is between 0 °～90 °.
The UV-detector of described receiving terminal is propped up by the logical ultraviolet filter of blind type band of day, photomultiplier and photoelectric detector and is configured to.After the optical filtering and noise reduction of the light signal that receives, be transformed into the signal of telecommunication,, thereby realize transmission of Information again through the amplification filtering demodulator circuit restore information of rear end by described photomultiplier through described day blind bandpass filter.
The reception elevation angle of described receiving terminal is also between 0 °～90 °.UV-detector at receiving terminal can receive in all directions, realizes non line of sight communication.UV-detector can be independent use, realizes the point-to-point communication of non line of sight, also can use a plurality ofly simultaneously, and promptly n 〉=2 o'clock are realized point-to-point or some communication to the broadcast mode of multiple spot.
In addition, collect the ability of light, a collector lens can also be set in the front of filter again in order to increase receiving terminal.
Free space day of the present invention, the beneficial effect of blind Ultra-Violet Laser communication system was: constitute by simple structure, the characteristics that have stronger scattering process according to ultraviolet light, utilize the carrier of the ultraviolet light wave of non-solar-blind band as information, with the atmosphere is transmission medium, realizes based on point-to-point or some radio communication to the multicast pattern in the local scope.Adopt the light source of ultraviolet laser as the information of transmission, and the light-emitting window place at the ultraviolet laser of transmitting terminal also is provided with divergent lens, flashlight is launched with bigger dispersion angle, thereby can propagate in non-directional mode, can the cut-through thing and realize the non line of sight ultraviolet communication.Ultraviolet communication has low eavesdropping rate, low level is debated advantages such as rate, strong interference immunity, comprehensive property, all weather operations.And receiving terminal is simple in structure, volume is small and exquisite, can carry, and mobility is stronger, is highly suitable for the secure communication in the local scope.
Description of drawings
Fig. 1 is the principle formation schematic diagram of blind Ultra-Violet Laser communication system of free space day of the present invention.
Fig. 2 is the formation schematic diagram of UV-detector of receiving terminal of blind Ultra-Violet Laser communication system of free space day of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments to free space of the present invention day blind Ultra-Violet Laser communication system be described further, but should not limit protection scope of the present invention with this.
Fig. 1 is the principle formation schematic diagram of blind Ultra-Violet Laser communication system of free space day of the present invention.As shown in Figure 1, blind Ultra-Violet Laser communication system is made of transmitting terminal and receiving terminal two parts free space day of the present invention.Described transmitting terminal is made of the ultraviolet laser 1 and the divergent lens 2 of non-solar-blind band, described receiving terminal is made of one or more UV-detector 3, detection by a plurality of photodetectors receives, and can realize point-to-point or some non line of sight ultraviolet communication to multiple spot.
Because present available low pressure mercury lamp light source is comprehensive emission light, power is not easy to concentrate, and present domestic day blind area ultraviolet light-emitting diode also do not have the product of practicability.So in the present invention, the light source that ultraviolet laser 1 conduct that transmitting terminal adopts angle freely to control sends information adopts the internal modulation mode.The divergent lens 2 of described transmitting terminal can adopt the ultraviolet lens of various materials such as ultraviolet melten glass, is placed in the light-emitting window place of described ultraviolet laser 1.The light that ultraviolet laser 1 sends is earlier through divergent lens 2, make flashlight be launched (considering that generally divergence half-angle is about 5 °～15 °) with bigger dispersion angle, in atmospheric channel, light is mainly propagated with the form of scattering, and the launching elevation of transmitting terminal is between 0 °～90 °.
Fig. 2 is the formation schematic diagram of UV-detector of receiving terminal of blind Ultra-Violet Laser communication system of free space day of the present invention.As shown in Figure 2, the UV-detector 3 of receiving terminal is made of the logical ultraviolet filter 5 of blind type band of day, photomultiplier 6 and photoelectric detector support 7.In addition, collect the ability of light, a collector lens 4 can also be set in the front of filter 5 in order to increase receiving terminal.Collector lens 4 is in order to collect more flashlight, the light signal that receives is through a day blind bandpass filter 5, filter out stray light by it, reduce after the noise, be transformed into the signal of telecommunication by described photomultiplier 6, again through the amplification filtering demodulator circuit restore information of rear end, thereby realize transmission of Information.
The reception elevation angle of receiving terminal is also between 0 °～90 °.Can receive in all directions by UV-detector 3 at receiving terminal, realize non line of sight communication.UV-detector 3 can be independent use, realizes the point-to-point communication of non line of sight, also can use a plurality of UV-detector 3 simultaneously at receiving terminal, i.e. n 〉=2 o'clock can be realized point-to-point or a bit to communication of multiple spot.
Ultra-Violet Laser communication system in the free space of present embodiment, (ultraviolet light of 200nm～280nm) is as the carrier of signal transmission to be based on non-solar-blind band.Because scattering and the decay of ultraviolet light in atmosphere, so the present invention is applicable to the secure communication in the local scope.
Claims (6)
- One kind free space day blind Ultra-Violet Laser communication system, constitute by transmitting terminal and receiving terminal two parts, it is characterized in that,Described transmitting terminal by day blind ultraviolet laser and divergent lens constitute, light that described ultraviolet laser sends through described divergent lens, makes flashlight scatter out with certain dispersion angle earlier,Described receiving terminal is made of one or more UV-detector, wherein, photoelectric detector is propped up by the logical ultraviolet filter of blind type band of day, photomultiplier and photodetector and is configured to, after the optical filtering and noise reduction of the light signal that receives through described day blind type bandpass filter, be transformed into the signal of telecommunication by described photomultiplier, again through the amplification filtering demodulator circuit restore information of rear end, thereby realize the point-to-point of non line of sight or a bit to communication of the broadcast mode of multiple spot.
- 2. free space day as claimed in claim 1 blind Ultra-Violet Laser communication system, it is characterized in that, in the described UV-detector, also be provided with collector lens in the front of described day blind type bandpass filter, in order to collect more flashlight.
- 3. free space day as claimed in claim 1 or 2 blind Ultra-Violet Laser communication system, it is characterized in that the logical ultraviolet laser of day blind type band of described transmitting terminal adopts the internal modulation mode, non-solar-blind band is 200nm～280nm.
- 4. free space day as claimed in claim 1 or 2 blind Ultra-Violet Laser communication system, it is characterized in that the divergent lens of described transmitting terminal is placed in the light-emitting window place of described ultraviolet laser.
- 5. free space day as claimed in claim 1 or 2 blind Ultra-Violet Laser communication system, it is characterized in that the launching elevation of described transmitting terminal is between 0 °～90 °, divergence half-angle is between 5 °～15 °.
- 6. free space day as claimed in claim 1 or 2 blind Ultra-Violet Laser communication system, it is characterized in that the reception elevation angle of described receiving terminal is between 0 °～90 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100901558A CN101986579A (en) | 2009-07-29 | 2009-07-29 | Day blind ultraviolet laser communication system in free space |
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| CN2009100901558A CN101986579A (en) | 2009-07-29 | 2009-07-29 | Day blind ultraviolet laser communication system in free space |
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| CN101986579A true CN101986579A (en) | 2011-03-16 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324973A (en) * | 2011-05-25 | 2012-01-18 | 西安理工大学 | Ultraviolet light non-line of sight (NLOS) communication directional access method based on angular sensing |
| CN104160640A (en) * | 2012-01-09 | 2014-11-19 | 阿托隆有限责任公司 | USPL-FSO lasercom point-to-point and point-to-multipoint optical wireless communication |
| CN108551365A (en) * | 2018-03-27 | 2018-09-18 | 西安理工大学 | Wireless ultraviolet light scattering signal adaptive receiving system and method for reseptance |
| CN108648985A (en) * | 2018-05-03 | 2018-10-12 | 西安交通大学 | A kind of deep ultraviolet light source of power adjustable section applied to ultraviolet light non line-of-sight communication |
| CN112235046A (en) * | 2020-10-20 | 2021-01-15 | 西安工程大学 | Noise reduction processing method for wireless ultraviolet communication |
| CN114866141A (en) * | 2022-04-24 | 2022-08-05 | 浙江理工大学 | Ultraviolet light communication system based on gallium oxide solar blind detector |
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| CN201048380Y (en) * | 2007-02-07 | 2008-04-16 | 陈晓华 | Free atmosphere ultraviolet communication machine |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324973A (en) * | 2011-05-25 | 2012-01-18 | 西安理工大学 | Ultraviolet light non-line of sight (NLOS) communication directional access method based on angular sensing |
| CN102324973B (en) * | 2011-05-25 | 2014-10-01 | 西安理工大学 | Ultraviolet light non-line of sight (NLOS) communication directional access method based on angular sensing |
| CN104160640A (en) * | 2012-01-09 | 2014-11-19 | 阿托隆有限责任公司 | USPL-FSO lasercom point-to-point and point-to-multipoint optical wireless communication |
| CN108551365A (en) * | 2018-03-27 | 2018-09-18 | 西安理工大学 | Wireless ultraviolet light scattering signal adaptive receiving system and method for reseptance |
| CN108648985A (en) * | 2018-05-03 | 2018-10-12 | 西安交通大学 | A kind of deep ultraviolet light source of power adjustable section applied to ultraviolet light non line-of-sight communication |
| CN112235046A (en) * | 2020-10-20 | 2021-01-15 | 西安工程大学 | Noise reduction processing method for wireless ultraviolet communication |
| CN112235046B (en) * | 2020-10-20 | 2023-10-31 | 深圳万知达科技有限公司 | Noise reduction processing method for wireless ultraviolet communication |
| CN114866141A (en) * | 2022-04-24 | 2022-08-05 | 浙江理工大学 | Ultraviolet light communication system based on gallium oxide solar blind detector |
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Application publication date: 20110316 |