首页> 外文会议>Conference on Laser Technology for Defense and Security >Yb-fiber-MOPA based high energy and average power uplink laser beacon for deep space communication operating under Nested PPM format
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Yb-fiber-MOPA based high energy and average power uplink laser beacon for deep space communication operating under Nested PPM format

机译:基于Yb-光纤-MOPA的高能量和平均功率上行激光信标,用于嵌套PPM格式的深空通信

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A Yb LMA fiber amplifier based 1030nm laser transmitter capable of operating with high average power and peak power (~500W, 9kW) is presented. The prototype, all-fiber, high TRL level laser transmitter is designed to meet all the single aperture requirements of a multi aperture deep space laser beacon system including operation with Nested pulse position modulation (PPM) format. Nested PPM format consist of an inner modulation PPM-(8,4) with 128nsec slot size and an outer modulation PPM-(2, 2) 65.5usec slot size. Here, nested PPM operation is presented for the first time. In implementing inner modulation strong pre-pulse shaping is required where PPM pattern dependent pulse energy variation (PEV) is minimized. Outer modulation is implemented by directly modulating VBG locked pump lasers for the final two gain. A sophisticated multi-stage, ultra-fast loss of signal (LOS) and backward Raman/lasing monitoring algorithm is implemented for ensuring reliabl operation. Mechanical and electrical design of the delivered laser is scalable to multiple apertures.
机译:提出了一种基于Yb LMA光纤放大器的1030nm激光发射器,该激光器能够以较高的平均功率和峰值功率(〜500W,9kW)工作。原型全光纤高TRL级激光发射器旨在满足多孔径深空激光信标系统的所有单孔径要求,包括使用嵌套脉冲位置调制(PPM)格式的操作。嵌套的PPM格式由一个内部调制PPM-(8,4)和一个外部调制PPM-(2,2)65.5usec时隙大小组成,内部调制PPM-(8,4)的时隙大小为128nsec。在这里,嵌套的PPM操作是第一次出现。在实施内部调制时,需要强大的预脉冲整形,其中最小化PPM模式相关的脉冲能量变化(PEV)。通过直接调制VBG锁定泵浦激光器来实现最终的两个增益,从而实现外部调制。先进的多级,超快信号丢失(LOS)和后向拉曼/激射监视算法可确保可靠运行。所交付激光器的机械和电气设计可扩展到多个孔径。

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