CN203261336U - Point-to-point fiber laser communication system under atmospheric environment - Google Patents
Point-to-point fiber laser communication system under atmospheric environment Download PDFInfo
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- CN203261336U CN203261336U CN 201220409502 CN201220409502U CN203261336U CN 203261336 U CN203261336 U CN 203261336U CN 201220409502 CN201220409502 CN 201220409502 CN 201220409502 U CN201220409502 U CN 201220409502U CN 203261336 U CN203261336 U CN 203261336U
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Abstract
The utility model relates to the field of optical communication, and especially provides a point-to-point fiber laser communication system under atmospheric environment. The system comprises two sets of fiber laser devices which emit information to each other and receive information, wherein each set of the fiber laser device comprises a control portion, a laser emission portion with a fiber laser, and a laser reception portion. The system has high quality optical quality and better working stability, and a signal capture device and a tracking device which are complex and need high precision are removed, thereby simplifying system structure, being portable, and reducing cost.
Description
Technical field
The utility model relates to optical communication field, the point-to-point optical-fiber laser communication system under especially a kind of atmospheric environment.
Background technology
Atmospheric laser communication refers to utilize laser to carry out a kind of communication mode that information is transmitted by atmosphere.It comprises two parts of sending and receiving, consists of radio digital communication system, and its basic principle is that the carrier wave light signal is finished point-to-point or point-to-multipoint communication by atmosphere as transmission channel.Be mainly used in fixing point and use, also can be used as emergent rob logical, at data network, telephone network, the networking emergency set of little honeybee net and Pico cell net and the closely occasion of inconvenient cabling and optical cable have wide practical use.Atmospheric laser communication equipment has without electromagnetic interference, networking maneuverability, convenient for installation and maintenance, the advantages such as communication reliability is high, good confidentiality, can transmit data, speech, the image of multiple speed.
Atmosphere laser communication system is become by two laser communication mechanisms, and it is light source that this technology adopts semiconductor laser at present, mutually launches modulated laser pulse signal to the other side, receives also demodulation from the other side's laser pulse signal, realizes duplex communication.The signal that the laser communication machine of transmitting terminal will be modulated makes laser luminous by power driving circuit, and the laser that is loaded with like this signal is launched by optical antenna, propagates take atmosphere as medium.The laser communication machine of receiving terminal at first will catch the beacon light source by optical antenna, determine the optical channel direction, because the beam quality of semiconductor laser and the limitation of job stability, must guarantee by high accuracy channel acquisition, the tracking means of complexity the stable reception of light signal, the light signal of collecting is poly-to photodetector, convert this light signal to the signal of telecommunication, after decoding, finish communication.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, point-to-point optical-fiber laser communication system under a kind of atmospheric environment is provided, it has more beam quality and the better job stability of high-quality, removed complicated and needed high-precision signal capture, tracking means, simplified System Construction, can be portable and reduced cost.
For realizing above-mentioned technical purpose, the scheme that the utility model provides is: the point-to-point optical-fiber laser communication system under a kind of atmospheric environment, comprise the optical-fiber laser equipment that two covers are mutually launched and received information, wherein, every unjacketed optical fiber laser equipment comprises control section, Laser emission part and laser pick-off part, described control section comprises control system, encoder, decoder, display unit, input unit and sight, control system connects respectively encoder, the output splicing optical fibers laser of encoder, the output of decoder connects display unit, the output of input unit connects control system, and sight and Laser emission axle are in the same way; Described laser emission section is divided and is comprised fiber laser, laser beam emitting device, and the input of fiber laser connects with encoder, and the output of fiber laser connects with laser beam emitting device, and laser beam emitting device will carry the sending and receiving of letter laser straight and be incident upon atmosphere; Described laser pick-off partly comprises laser receiver and optical-electrical converter, and the input of optical-electrical converter connects with laser receiver, and the output of optical-electrical converter connects with control system.
And above-mentioned sight is optical foresight.
And above-mentioned control system is the ARM system.
And above-mentioned input unit is keyboard.
And the optical maser wavelength that above-mentioned fiber laser produces is 1.54 μ m, and the angle of divergence is not more than 1mrad.
And, connect between the fiber laser of above-mentioned Laser emission part and the laser beam emitting device amplifier is set.
And above-mentioned display unit is LCD or light-emitting diode display.
Advantage of the present utility model is as follows.
1, adopting fiber laser is light source, and its beam quality and job stability are better than the at present semiconductor laser of use.
2, optical maser wavelength 1.54 μ m, compare with 1.06 μ m laser commonly used: 1.54 μ m laser, significantly improve the atmosphere penetration capacity without injury human eye, have guaranteed can normally use under severe weather conditions.
3, because of fiber laser good beam quality: angle of divergence 1mrad, spot diameter is less than 3 meters during apart from 3000 meters, and laser power density is higher, so we select the receiving element of adequate sensitivity, can avoid being subjected to because of the signal misconnection that the target reflection causes.
4, beacon light source, signal optical source unite two into one, and adopt optical sighting device to aim at, and dispose three-dimensional adjusting pole, and be simple in structure, easy to carry; Need not AC power, pair of DC+12V storage battery can use 5 days continuously.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Present embodiment provides the point-to-point optical-fiber laser communication system under a kind of atmospheric environment, comprises two optical-fiber laser equipment of mutually launching and receiving information, and wherein, each optical-fiber laser equipment comprises control section, Laser emission part, and laser pick-off part.
Described control section comprises control system, encoder, decoder, display unit, input unit and sight, control system connects respectively encoder, the output splicing optical fibers laser of encoder, the output of decoder connects display unit, the output of input unit connects control system, and sight and Laser emission axle are in the same way.
Described laser emission section is divided and is comprised fiber laser, laser beam emitting device, and the input of fiber laser connects with encoder, and the output of fiber laser connects with laser beam emitting device, and laser beam emitting device will carry the sending and receiving of letter laser straight and be incident upon atmosphere.
Described laser pick-off partly comprises laser receiver and optical-electrical converter, and the input of optical-electrical converter connects with laser receiver, and the output of optical-electrical converter connects with control system.
Above-mentioned sight is optical foresight, can adopt the high-end military discipline gunsight of U.S. BSA STS 8-32X44SF self-locking, has 8-32 times of multiplication factor, and effectively sighting distance can reach 3000m.The BSA gunsight has effectively solved transmitting terminal and the pointing problem of receiving terminal in the point-to-point communication engineering in the utility model.
Above-mentioned control system is the ARM system, and present embodiment provides and adopts the AT91SAM3S chip of ARM series to control.
Above-mentioned input unit is keyboard.
The optical maser wavelength that above-mentioned fiber laser produces is 1.54 μ m, and the angle of divergence is not more than 1mrad, so that the spot diameter of this laser at distance light source 3000m place only is 3m.Can avoid the signal misconnection of other non-required communication equipment ends to receive.In addition, because different from the sensitivity of the receiving element of other non-required communication equipment ends, further avoid receiving because of the misconnection that the target reflection causes.Every can be with reference to following formula:
Pmin?=?(Vmin/R)/αx?(Δ/D)↑2?x?1/trox1/tatm。
The implication of every index is as shown in the table.
| Required minimum laser power | Pmin |
| The magnitude of voltage of changing behind the minimum laser signal that receiving element can receive | V min |
| The amplifier impedance | R |
| Receiving element is surveyed index | α |
| The receiving element damped expoential | t ro |
| Atmospheric attenuation index (3km) | t atm |
| The receiver hole diameter |
 |
| Utilizing emitted light beam diameter (3km) | D |
Connect between the fiber laser of above-mentioned Laser emission part and the laser beam emitting device amplifier is set.
Above-mentioned display unit is LCD display, and the LCD display system adopts the ATmega16 microcontroller of AVR CPU core, and LCD display is communicated by letter with control system, the control information that supplementary controlled system collection push button signalling, display control program send etc.Display unit also can adopt light-emitting diode display.
The utility model when work, by sight the transmitting terminal of one of them optical-fiber laser equipment is aimed at the receiving terminal of another optical-fiber laser equipment first, by the information of input unit to the communication of control system editor's need.Control system makes fiber laser that information is loaded on the laser by encoder, then will carry letter laser is emitted to another optical-fiber laser equipment by atmosphere receiving terminal by laser beam emitting device.
Because the laser beam quality that fiber laser produces is good, and 1.54 very outstanding mum wavelength laser of atmosphere penetration power have been used, light signal is stable, so need not complicated signal capture, tracking means during receiving optical signals, after laser receiver is received light signal, after narrow band filter filters, convert this light signal input optical-electrical converter to the signal of telecommunication, and then metering-in control system is processed.The signal of telecommunication can show at the LCD display devices display by decoder, finishes communication.
Claims (7)
1. the point-to-point optical-fiber laser communication system under the atmospheric environment, comprise the optical-fiber laser equipment that two covers are mutually launched and received information, it is characterized in that: every unjacketed optical fiber laser equipment comprises control section, the Laser emission part, and laser pick-off part, described control section comprises control system, encoder, decoder, display unit, input unit and sight, control system connects respectively encoder, the output splicing optical fibers laser of encoder, the output of decoder connects display unit, the output of input unit connects control system, and sight and Laser emission axle are in the same way; Described laser emission section is divided and is comprised fiber laser, laser beam emitting device, and the input of fiber laser connects with encoder, and the output of fiber laser connects with laser beam emitting device, and laser beam emitting device will carry the sending and receiving of letter laser straight and be incident upon atmosphere; Described laser pick-off partly comprises laser receiver and optical-electrical converter, and the input of optical-electrical converter connects with laser receiver, and the output of optical-electrical converter connects with control system.
2. the point-to-point optical-fiber laser communication system under a kind of atmospheric environment according to claim 1, it is characterized in that: described sight is optical foresight.
3. the point-to-point optical-fiber laser communication system under a kind of atmospheric environment according to claim 1, it is characterized in that: described control system is the ARM system.
4. the point-to-point optical-fiber laser communication system under a kind of atmospheric environment according to claim 1, it is characterized in that: described input unit is keyboard.
5. the point-to-point optical-fiber laser communication system under a kind of atmospheric environment according to claim 1 is characterized in that: the optical maser wavelength that described fiber laser produces is 1.54 μ m, and the angle of divergence is not more than 1mrad.
6. the point-to-point optical-fiber laser communication system under a kind of atmospheric environment according to claim 1 or 5 is characterized in that: connect between the fiber laser of described Laser emission part and the laser beam emitting device amplifier is set.
7. the point-to-point optical-fiber laser communication system under a kind of atmospheric environment according to claim 1, it is characterized in that: described display unit is LCD or light-emitting diode display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220409502 CN203261336U (en) | 2012-08-17 | 2012-08-17 | Point-to-point fiber laser communication system under atmospheric environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220409502 CN203261336U (en) | 2012-08-17 | 2012-08-17 | Point-to-point fiber laser communication system under atmospheric environment |
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| Publication Number | Publication Date |
|---|---|
| CN203261336U true CN203261336U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220409502 Expired - Lifetime CN203261336U (en) | 2012-08-17 | 2012-08-17 | Point-to-point fiber laser communication system under atmospheric environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104683033A (en) * | 2013-11-28 | 2015-06-03 | 哈尔滨市三和佳美科技发展有限公司 | Bidirectional remote laser communication apparatus |
-
2012
- 2012-08-17 CN CN 201220409502 patent/CN203261336U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104683033A (en) * | 2013-11-28 | 2015-06-03 | 哈尔滨市三和佳美科技发展有限公司 | Bidirectional remote laser communication apparatus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |