Efficient high-power UV laser generated by an optimized flat-flat actively Q-switched laser with extra-cavity harmonic generations

Y. J. Huang, P. Y. Chiang, H. C. Liang, Kuan-Wei Su, Yung-Fu Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We investigate the parasitic lasing effect in the high-power actively Q-switched laser with a flat-flat resonator. The parasitic lasing effect in the low-Q stage is found to lead to long tails in the output pulses, corresponding to the peak-power reduction. We experimentally determine the shortest cavity length without the parasitic lasing effect to optimize the performance of the high-power actively Q-switched laser with a flat-flat cavity. We further use the optimized fundamental laser to generate green and UV lasers by extra-cavity harmonic generations. At a pump power of 44 W, the output powers at 355 nm and 532 nm as high as 6.65 W and 8.38 W are obtained at a pulse repetition rate of 40 kHz.

Original languageEnglish
Pages (from-to)59-63
Number of pages5
JournalOptics Communications
Volume285
Issue number1
DOIs
StatePublished - 1 Jan 2012

Keywords

  • Acousto-optically Q-switching
  • Diode-pumped solid-state laser
  • Extra-cavity second and third harmonic generation
  • Parasitic lasing effect

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