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22 February 2007 Current developments in high-power monolithic polarization maintaining fiber amplifiers for coherent beam combining applications
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Abstract
Monolithic, all-fiber PM optical amplifiers have been investigated regarding components performance, amplifier design and narrow line-width amplification. PM-based components performed very well, the pump/signal combiner in particular handling > 300W pump power and still maintaining the PER of the input signal. A co-pumped amplifier configuration was chosen based on reliability and potential SBS mitigation (i.e. fiber length after the active fiber output). This system based on PLMA-YDF - 25/400 fiber appeared to give the best output power (155W-177W, depending on the length of passive delivery fiber), PER (~ 17 dB) and excellent beam quality (M2= 1.1). Altering the fiber temperature and length were necessary to provide the best results.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. P. Machewirth, Q. Wang, B. Samson, K. Tankala, M. O'Connor, and M. Alam "Current developments in high-power monolithic polarization maintaining fiber amplifiers for coherent beam combining applications", Proc. SPIE 6453, Fiber Lasers IV: Technology, Systems, and Applications, 64531F (22 February 2007); https://doi.org/10.1117/12.712691
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