Full duplex cat eye reverse modulation recovery free space laser communication system

A technology of laser communication and reverse modulation, which is applied in the direction of free space transmission and short-distance systems, can solve the problems of poor anti-atmospheric turbulence effect, limited communication distance, large weight and volume, etc., and achieve strong and huge anti-atmospheric turbulence effect Effect of application potential, weight and small size

Active Publication Date: 2015-01-07
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

[0004] In order to solve the existing problems of the existing full-duplex reverse modulation recovery free space laser communication system, such as large weight and volume, high cost, low communication rate...

Method used

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  • Full duplex cat eye reverse modulation recovery free space laser communication system
  • Full duplex cat eye reverse modulation recovery free space laser communication system

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Embodiment Construction

[0013] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0014] like figure 2 As shown, the full-duplex cat's-eye reverse modulation recovery free space laser communication system, in the main laser communication terminal, laser one 17 and transmission data source 19 are respectively connected to DPSK modulator 18, laser two 25 and DPSK modulator 18 are connected to fiber amplifier one After 20, it is connected with the optical fiber circulator-23 port a, the optical fiber circulator-23 port b is connected with the optical antenna 24, the port c is connected with the photodetector-22, and the photodetector-22 is connected with the DPSK demodulator 21.

[0015] In the reverse modulation recovery laser communication terminal machine, the cat's eye optical system 26 is coaxially arranged with the optical antenna 24, the optical filter beam splitter 27 is arranged between the cat's eye optical system 26 and the...

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Abstract

The invention relates to a full duplex cat eye reverse modulation recovery free space laser communication system, belongs to the technical field of wireless communication, and solves the problem of low transmission rate of the system in the prior art. A laser I and a transmitting data source are both connected with a DPSK (differential phase shift keying) modulator, the DPSK modulator and a laser II are both connected with an optical fiber amplifier I, two communication lights are amplified and then connected with a port a of a fiber circulator, a port b of the fiber circulator is connected with an optical antenna, a port c of the fiber circulator is connected with a photoelectric detector I, the photoelectric detector I is connected with a DPSK modulator I, a cat eye optical system is coaxially arranged with the optical antenna, an optical filtering beam splitter is arranged between the cat eye optical system and a laser collimating lens and forms an angle of 45 degrees with the cat eye optical system, the laser collimating lens is connected with a port d of a fiber circulator II, a port e of the fiber circulator II, an optical fiber amplifier II and the DPSK modulator II are sequentially connected, the other end of the DPSK modulator is connected with a port f of the fiber circulator II, and a photoelectric detector II is connected with the DPSK modulator.

Description

technical field [0001] The invention relates to a free space laser communication device, in particular to a full-duplex cat's-eye reverse modulation wireless communication device, which belongs to the technical field of wireless communication. Background technique [0002] The working principle of the existing full-duplex free-space laser communication system based on modulation recovery is as follows: by emitting modulated laser light to receive information at the terminal machine based on reverse modulation, and load information through the reverse modulation recovery reflector to reflect back to the original transmitting terminal machine , where the downlink often uses frequency shift keying (FSK) subcarrier modulation, while the uplink often uses circular polarization keying (CPK) modulation, which avoids the interference of single-beam laser modulation information, thus realizing full-duplex Free laser communication, the system is based on reverse modulation and the ret...

Claims

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Application Information

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IPC IPC(8): H04B10/114
Inventor 张鹏王天枢李晓燕董科研姜会林
Owner CHANGCHUN UNIV OF SCI & TECH
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