System response in passively phased fiber amplifier arrays

Sami A. Shakir; Bill Culver; Burke Nelson; Yuji Starcher; George M. Bates; Jerry W. Hedrick Jr.

doi:10.1117/12.795315

3 September 2008 System response in passively phased fiber amplifier arrays

Sami A. Shakir, Bill Culver, Burke Nelson, Yuji Starcher, George M. Bates, Jerry W. Hedrick Jr.

Proceedings Volume 7070, Optical Technologies for Arming, Safing, Fuzing, and Firing IV; 70700O (2008) https://doi.org/10.1117/12.795315
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

System temporal response in passively phased fiber amplifier arrays dictates how fast a passively phased system can correct for phase fluctuations due to thermal and mechanical effects. The system response time was measured by employing a variable-speed mechanical chopper in the feedback loop of a passively phased system then measuring the on-axis output intensity of the system as a function of time. Observed relaxation oscillations are compared to theory. The system response time was measured to be about 20 μsec. We also find that passive phasing improved the system's beam stability and extraction efficiency.

Citation Download Citation

Sami A. Shakir, Bill Culver, Burke Nelson, Yuji Starcher, George M. Bates, and Jerry W. Hedrick Jr. "System response in passively phased fiber amplifier arrays", Proc. SPIE 7070, Optical Technologies for Arming, Safing, Fuzing, and Firing IV, 70700O (3 September 2008); https://doi.org/10.1117/12.795315

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