Free space optical communication system and communication method based on modulated retroreflector
A free space, retroreflector technology, applied in the field of space optical communication, can solve the problems of restricting the popularization and use of optical communication systems, demanding instruments, and high equipment costs, achieving the effects of low power, wide operating temperature range, and favorable integration.
Inactive Publication Date: 2015-09-09
HEFEI DINGCHEN PHOTOELECTRIC TECH
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Problems solved by technology
However, due to the high cost of equipment and strict requirements for instruments, the popularization and use of this optical communication system is limited.
Method used
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[0030] see figure 1 , a free-space optical communication system based on a modulated retroreflector, with:
[0031] The local beam transmitting end is used to emit coded laser beams, and is composed of an encoder 101 and an infrared laser 102. The encoder 101 is used to code the emitted beams. The infrared laser 102 works in the 1.55 μm wave band that is safe for human eyes.
[0032] beam splitter 104, used to deflect the emitted light and pass through the retroreflected light;
[0033] The telescope system is used to automatically scan and track remote targets. It is composed of a telescope 103, a deflection mirror 105 and its automatic control system 115. The automatic control system 115 is composed of optical imaging equipment and a control terminal for imaging. On the imaging device, if the imaging position deviates from the center position of the image, the control terminal sends an instruction to the deflection mirror 105 to adjust the direction of the beam so that the ...
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The invention relates to the technical field of space optical communication, in particular to a free space optical communication system based on a modulation retroflector and a communication method thereof. The system comprises a local beam transmitting terminal, a beam splitter, a telescope system, a space remote modulation retroflector system and a local beam receiving terminal, wherein the local beam transmitting terminal is used for transmitting laser beam conducted to coding; the beam splitter is used for deflecting emitted light and transmitting retroreflecting light; the telescope system is used for automatically scanning and tracking a remote goal; the space remote modulation retroflector system is used for loading gathered signals to incident beam and retroreflecting the beam along the original path; and the local beam receiving terminal is used for receiving retroreflecting beam and demodulating the signals. The remote part of the system takes a specially designed retroreflecting enhanced scattering surface or a cube-corner prism as a light retroreflector, so that the cost, the weight and the thickness of the system are greatly reduced; and as retroreflection surfaces with arbitrary areas can be manufactured, integration is very convenient, and the system is applicable to various occasions, and has very wide promotion and application prospects.
Description
technical field [0001] The invention relates to the technical field of space optical communication, in particular to a free space optical communication system based on a modulating retroreflector and a communication method thereof. Background technique [0002] Free space optical communication has shown very attractive prospects in recent years. Due to the maturity of lasers and integrated optical systems, and the inherent characteristics of near-infrared light such as eye safety, space optical communication has become a very attractive means of data transmission. The inherent advantages of optical communication are: huge bandwidth, low possibility of being intercepted, small size, light payload, and anti-interference ability. [0003] For the traditional space optical link transmission system, in addition to commonly used modulation / demodulation, control, capture equipment and related software, high-quality telescopes are required to provide precise orientation and trackin...
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IPC IPC(8): H04B10/11
Inventor 王安廷崔哲
Owner HEFEI DINGCHEN PHOTOELECTRIC TECH