Point-to-multipoint space laser communication system based on wavelength division multiplexing technology
A multiplexing technology and laser communication technology, applied in the field of point-to-multipoint space laser communication system, can solve the problems of complex optical antenna design, increase difficulty and cost, increase transmission power, etc., and reduce the technical complexity of networking , The effect of simple structure and high utilization of light energy
Active Publication Date: 2018-03-16
ZHEJIANG UNIV
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Problems solved by technology
At present, some point-to-multipoint free-space laser communication system schemes have been proposed at home and abroad. For example, in 2005, the Scott W.Sparrold research group proposed to transmit optical signals at different angles and increase the emission angle on the reflective arc surface to transmit optical signals to Networking schemes for different receiving terminals, Jiang Huilin’s research group proposed in 2016 a schem
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[0023] The present invention will be further described below in conjunction with drawings and embodiments.
[0024] Such as figure 1 As shown, the specific implementation of the present invention includes a transmitting end and a receiving end, and a space wave division multiplexing system is set between the transmitting end and the receiving end.
[0025] Such as figure 2 As shown, the transmitting end includes a laser 1, a first optical antenna 2, a polarization controller 8, a signal source 9, an electro-optic modulator 10 and a first space-fiber coupling device 11, and the output end of the laser 1 passes through the polarization controller 8, The electro-optic modulator 10 and the first space-fiber coupling device 11 are coupled and connected to the first optical antenna 2, and the signal source 9 is connected to the electro-optic modulator 10; the optical signal emitted by the laser 1 at the transmitting end is polarized and adjusted by the polarization controller 8 I...
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The invention discloses a point-to-multipoint space laser communication system based on a wavelength division multiplexing technology. A multi-wavelength carrier signal of a transmitting end is incident to a free space through a space-fiber coupling device and then is emitted in the forward direction by a first optical antenna; after optical signals are received by a second optical antenna, the optical signals with different wavelengths are respectively focused by a space wavelength division multiplexing device, are coupled into different optical fibers in an optical fiber array, are emitted in the forward direction by a third optical antenna group, are transmitted to a fourth optical antenna through an atmospheric channel, and are respectively detected and received by a receiving module set of the specific wavelength, so that the multi-channel signal transmission is achieved. According to the system, the coverage range of the space laser communication system is greatly expanded, a problem of single-point-to-multipoint simultaneous information transmission of space laser communication is solved, and the system has important significance for networking technologies of modern space laser communication.
Description
technical field [0001] The invention relates to free space laser communication technology, in particular to a point-to-multipoint space laser communication system based on wave division multiplexing technology. Background technique [0002] Free space laser communication refers to the optical communication technology that uses laser as a carrier to transmit data information in the atmosphere or vacuum. As an emerging communication technology, free space laser communication combines the advantages of optical fiber communication and microwave communication. It has unique advantages such as high speed, convenience, safety, flexible networking, and is not limited by the shortcomings of traditional optical fibers. It is an effective way to reach the user's "last mile" transmission bottleneck, and it also has an important application in laser communication between low-earth orbit satellites. [0003] At this stage, the research on point-to-point free-space laser communication sys...
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Login to View More IPC IPC(8): H04J14/02H04B10/11H04B10/25
CPCH04B10/11H04B10/25891H04J14/0282
Inventor高士明江荷馨冯湘莲吴志航
OwnerZHEJIANG UNIV