145-watt high beam quality bidirectional voltage-supplied Q-switched Nd

YAG master oscillator power amplifier laser

Zhenxu Bai, Mingliang Long, Liyuan Chen, Meng Chen, Gang Li

Research output: Contribution to journalArticle

4 Citations (Scopus)


We present a high compact structure laser diode (LD) sidepumped all-solid-state Q-switched master oscillator power amplifier (MOPA) laser system with high beam quality. Bidirectional voltagesupplied Q-switched and MOPA technologies were introduced in the design. An in-center wavelength of 1064 nm with pulse width adjustability from 5 to 18 ns was obtained at the repetition rate of 500 Hz. Through multistage Nd:YAG amplifiers at the pulse width of 6 ns, the oscillator was scaled up to 145 W and the corresponding peak power reached 48.3 MW with single pulse energy fluctuation less than 0.45% in 1 h operation.

Original languageEnglish
Article number024202
Pages (from-to)1-4
Number of pages4
JournalOptical Engineering
Issue number2
Publication statusPublished - 2013
Externally publishedYes



  • Bidirectional voltage-supplied Q-switch
  • Laser diode pumped
  • Laser techniques
  • Master oscillator power amplifier
  • Nd:YAG crystal

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