کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
735816 | 893663 | 2011 | 4 صفحه PDF | دانلود رایگان |
We demonstrate coherent beam combination of 137 W fiber amplifier array using single frequency dithering technique. Four polarization-maintained fiber amplifiers are tiled into 2×2 array and the output power of each amplifier is about 35 W. Single frequency dithering algorithm is run on a signal processor based on field programmable gate array (FPGA) for phase control on the fiber amplifiers. When the phase control system goes into closed-loop, the fringe contrast of far-field intensity pattern is improved by more than 87% from 0 in open-loop, and the residual phase error is less than λ/20.
Research highlights
► Coherent beam combination of 137-W fiber amplifier array has been demonstrated.
► Single frequency dithering technique has been used for phase locking.
► When the control system is in closed loop, the residual phase error is less than λ/20.
Journal: Optics and Lasers in Engineering - Volume 49, Issue 8, August 2011, Pages 1089–1092