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文中讨论了卫星间和星地间激光通信技术方案的若干问题。从背景噪声、体积、质量、器件性能和可行性角度 ,比较分析了激光波段的选择。 80 0和 1550nm波段的半导体激光器具有体积小、质量轻、效率高的优点。与可见波段相比 ,背景噪声低。提出了一个利用光纤通信技术和器件总体方案的建议。采用由半导体激光器振荡器和EDFA光放大器构成的MOPA结构作为通信发射机的光源 ;采用光纤环行器和光纤耦合器实现发收光路的复用 ;采用窄线宽光纤光栅提高接收机的信噪比 ,与原子线滤波器相比具有波段选择范围宽等好处。
In this paper, we discussed some problems of the laser communication technology between satellite and satellite. From the perspective of background noise, volume, quality, device performance and feasibility, the choice of laser band is compared and analyzed. Semiconductor lasers in the 80 0 and 1550 nm bands have the advantages of small size, light weight and high efficiency. Compared with the visible band, the background noise is low. Proposed a use of optical fiber communication technology and device overall proposal. Using MOPA structure consisting of a semiconductor laser oscillator and an EDFA optical amplifier as a light source of a communication transmitter; using a fiber circulator and a fiber coupler to realize multiplexing of a transmitting and receiving optical path; using a narrow linewidth optical fiber grating to improve a receiver’s signal-to-noise ratio , Compared with the atomic filter has a band wide range of benefits.