High-data-rate laser transmitters for free-space laser communications
High-data-rate laser transmitters for free-space laser communications
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DOI：
10.1117/12.346189
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发表时间：
1999-04
期刊：
影响因子：
1.9
通讯作者：
A. Biswas;H. Hemmati;J. Lesh
中科院分区：
文献类型：
--
作者：
A. Biswas;H. Hemmati;J. Lesh
目前正在开发和鉴定用于未来空间激光通信终端的主振荡器功率放大器激光系统。这些激光器分为用于深空和近地（包括地球同步轨道）轨道卫星的几类。研究了用于深空应用的二极管泵浦调Q Nd：YVO_4振荡器和多程Nd：YAG放大器激光器，平均输出功率为1.5 W，能够支持100 KHz的重复频率。该激光器在1064 nm处发射，并在400 Kbps的数据速率下用脉冲位置调制进行测试。激光脉冲宽度（约2 ns FWHM）和定时抖动（± 8 ns）的报告与有关深空性能的相关讨论。针对近地应用，简要描述了一种两级二极管泵浦光纤放大器系统，该系统提供1072 nm的发射，平均功率为4 W，能够支持2.5 Gbps的数据速率。第二个半导体扩口放大器系统在980纳米发射也已开发，并正在等待表征。
Master-oscillator power-amplifier (MOPA) laser systems, for future lasercom terminals to be flown in space are being developed and characterized. These lasers fall into groups for applications in deep space and near earth (including GEO) orbiting satellites. For deep space applications a diode pumped Q-switched Nd:YVO4 oscillator and a multi-pass Nd:YAG amplifier laser with an average output power of 1.5 W and capable of supporting repetition rates of 100 KHz was studied. This lasers emits at 1064 nm and was tested with pulse position modulation at data rates of 400 Kbps. The laser pulse width (approximately 2 ns FWHM) and timing jitter (plus or minus 8 ns) are reported with relevant discussions pertaining to deep space performance. For near earth applications, a two stage diode pumped fiber amplifier system providing 1072 nm emission with 4 W of average power and capable of supporting data rates of 2.5 Gbps is briefly described. A second semiconductor flared amplifier system emitting at 980 nm has also been developed and is awaiting characterization.