8.2 kW high beam quality quasi-continuous-wave face-pumped Nd:YAG slab amplifier.
Appl Opt
; 54(16): 5011-5, 2015 Jun 01.
Article
en En
| MEDLINE
| ID: mdl-26192659
ABSTRACT
An 8 kW level quasi-continuous-wave (QCW) face-pumped 1064 nm slab laser with high beam quality was developed by a master oscillator power amplifier (MOPA) system. A single-mode fiber seed laser was amplified by two-stage single-pass NdYAG rod preamplifiers and four face-pumped NdYAG slab amplifiers. The slab amplifiers were well designed with uniform pumping and uniform cooling for well-distributed thermal and stress. A dynamically feedbacked optical aberration compensation device was employed to correct low-order optical aberration, and the residue high-order optical aberration was corrected by an adaptive optics system. The QCW MOPA delivered up to an average power of 8.2 kW with a pulse duration of 200 µs at a repetition rate of 400 Hz. The beam quality factor was measured to be ß=3.5.
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Appl Opt
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2015
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Article