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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 15,
  • Issue 4,
  • pp. 041402-
  • (2017)

33 W continuous-wave single-frequency green laser by frequency doubling of a single-mode YDFA

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Abstract

A high power continuous-wave single-frequency green fiber laser by second-harmonic generation of a Yb-doped fiber amplifier (YDFA) is developed. A linearly polarized single-mode fiber amplifier produces a 60 W infrared laser at 1064 nm with a 103 W incident diode pump laser at 976 nm, corresponding to an optical conversion efficiency of 58%. An external bow-tie enhancement cavity incorporating a noncritically phase-matched lithium triborate crystal is employed for second-harmonic generation. A 33.2 W laser at 532 nm is obtained with a 45 W incident 1064 nm fundamental laser, corresponding to a conversion efficiency of 74%.

© 2017 Chinese Laser Press

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