High-speed mid-infrared space laser communication system and communication method

A laser communication, high-speed technology, applied in free space transmission, short-range systems, etc., can solve the problem of low information transmission rate, and achieve the effect of rapid response and low introduction of noise

Active Publication Date: 2017-01-04
西安中科天塔科技股份有限公司
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Problems solved by technology

[0006] In order to overcome the problem of low information transmission rate of the above-mentioned mid-infrared space laser communication system, the present invention provides a high-speed mid-infrared space laser communication system and communication method

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  • High-speed mid-infrared space laser communication system and communication method
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  • High-speed mid-infrared space laser communication system and communication method

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Embodiment Construction

[0039] Technical principle of the present invention:

[0040] In the second order nonlinear polarization coefficient χ (2) In a non-zero nonlinear medium, if there are two light waves ω of different frequencies 1 and ω 2Simultaneous incidence, under the action of the second-order nonlinearity, will produce a frequency of ω 3 = ω 1 +ω 2 light field; if the frequency of the two incident light waves is ω 1 and ω 3 , then under the second-order nonlinear action, the frequency will be ω 2 = ω 3 -ω 1 This is the process of generating the sum-frequency light and difference-frequency light. And in this process, the wave vector k corresponding to each frequency i (i=1,2,3) satisfy k 1 +k 2 -k 3 =0 phase matching condition, at the same time, the optical field amplitude E(ω 1 ,z), E(ω 2 ,z) and E(ω 3 , z) satisfy the following relationship:

[0041] d E ( ω 1 ...

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Abstract

The invention discloses a high-speed intermediate-infrared laser space communication system and a communication method. The system comprises a first laser device, a near-infrared high-speed electrooptical modulator, an optical parameter difference frequency device and a transmitting antenna which are connected sequentially, a second laser device connected with the optical parameter difference frequency device, a receiving antenna, an optical parameter sum frequency device, a near-infrared high-speed photodetector and a high-speed electrical signal processing unit which are connected sequentially, and a third laser device connected with the optical parameter sum frequency device, wherein the near-infrared high-speed electrooptical modulator is connected with the high-speed electrical signal processing unit; the optical wave frequency generated by the first laser device is omega p1; the optical wave frequency generated by the second laser device is omega s1; and the optical wave frequency generated by the third laser device is omega p2. According to the system and the method, restriction of immaturity of a high-speed intermediate-infrared communication device to an intermediate-infrared laser space communication rate is avoided, and space communication transmission and processing of high-speed (tens to hundreds of Gbits / s) and high-capacity optical information can be achieved.

Description

technical field [0001] The invention belongs to the field of space laser communication. Specifically, it relates to a high-speed mid-infrared space laser communication system and a communication method. Background technique [0002] Compared with microwave and optical fiber communication, space laser communication has large communication capacity, good directionality, strong anti-interception and anti-electromagnetic interference capabilities, no need to apply for spectrum license, small device size and power consumption, and can be integrated with existing optical fiber communication networks , No need to lay optical fiber lines and other advantages, it is an effective means to realize high-speed and real-time communication in space. [0003] Based on the consideration of device maturity, the current conventional space laser communication system generally uses three near-infrared bands of 0.8 μm, 1.064 μm or 1.55 μm as the information carrier frequency bands. Due to the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/114
Inventor 黄新宁韩彪谢小平胡辉汪伟段弢
Owner 西安中科天塔科技股份有限公司
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