کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
734025 893386 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Coherent beam combining of two fiber amplifiers using stochastic parallel gradient descent algorithm
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Coherent beam combining of two fiber amplifiers using stochastic parallel gradient descent algorithm
چکیده انگلیسی
We demonstrate the coherent beam combining of fiber amplifiers using a stochastic parallel gradient descent (SPGD) algorithm, producing a total output power of 23 W. Active phase control on each amplifier is performed by running the SPGD algorithm on a DSP chip with updating rate of almost 100 kHz. Experimental results show that power encircled in the target pinhole in closed-loop mode is 1.85 times more than that in open-loop mode, which is 92% of the ideal case. The fringe contrast of the far-field fringe pattern is as high as 92% when the system is in closed-loop mode. The whole system in closed-loop mode performs well in a long-time observation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics & Laser Technology - Volume 41, Issue 7, October 2009, Pages 853-856
نویسندگان
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