title: 103 W high beam quality green laser with an extra- cavity second harmonic generation.
abstract: We demonstrated a 103.5 W green laser with an extra-cavity second harmonic generation. The IR source was a high power Q-switched Nd:YVO(4) MOPA laser. The type I phase-matching LiB(3)O(5) was used as the nonlinear crystal in the second harmonic generation. The 103.5 W average power of 532 nm green laser was obtained at a repetition rate of 60 kHz with the beam quality factors of M2x <1.44 and M2y <1.23 in the orthogonal directions, corresponding to a peak power as high as 1.5 MW with the instability of pulse energy less than +/-4%. The optical frequency conversion efficiency from IR to green laser was up to 67%.
authors.affiliation: Department of Precision Instruments, Center for Photonics and Electronics, State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China. qiangliu@mail.tsinghua.edu.cn
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Xingpeng
authors.initials: X
authors.lastname: Yan
authors.forename: Mali
authors.initials: M
authors.lastname: Gong
authors.forename: Xing
authors.initials: X
authors.lastname: Fu
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Wang
mesh_terms: D003116:Color; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State