21 February 2011 Fiber-MOPA based multi-kW uplink laser beacons for deep-space communication links
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KW level fiber based MOPA laser system at 1064nm for uplink deep space communication is developed and characterized. System achieves 11.5 kW peak power (600W average power) at 500 kHz (5% duty cycle) with >70% optical conversion efficiency. Experiments using 16-ary PPM format are presented where without pre-pulse shaping >±60% pulse energy variation is observed. Gain dynamics is identified as main source of pulse to pulse energy fluctuation. Novel, FPGA implementable open loop pulse shaping algorithm is developed and demonstrated. Resulting pulse energy statistics are reported, where <±7% pulse energy variation is achieved for 90% of pulses.
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Doruk Engin, Wei Lu, Frank Kimpel, Youming Chen, Mehmetcan Akbulut, and Shantanu Gupta "Fiber-MOPA based multi-kW uplink laser beacons for deep-space communication links", Proc. SPIE 7923, Free-Space Laser Communication Technologies XXIII, 79230D (21 February 2011); doi: 10.1117/12.875784; https://doi.org/10.1117/12.875784

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