Passive Phase Locking of Three Nanosecond Fiber Amplifiers Using a Dammann Grating Spatial Filter
作者： Yi-Feng Yang , Ye Zheng , Bing He , Jun Zhou , Hou-Kang Liu
DOI: 10.1088/0256-307X/31/8/084206
关键词: Visibility 、 Fiber amplifier 、 Nanosecond 、 Spatial filter 、 Beam (structure) 、 Grating 、 Feedback loop 、 Optics 、 Power (physics) 、 Materials science
摘要: A passive coherent beam combination of three nanosecond Yb-doped fiber amplifiers by an all-optical feedback loop is realized a Dammann grating intracavity spatial filter. By using this diffractive-optics-based filtering technique, tile-aperture laser beams are phase-locked with peak power 1.02 kW. The width the combined pulses 9.6 ns, and repetition frequency 2.208 MHz. visibility far-field interference pattern up to 82.9%. results show that approach can scale larger arrays higher powers.
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