Improvement of stability and efficiency in diode-pumped passively Q-switched intracavity optical parametric oscillator with a monolithic cavity

J. Y. Huang, W. Z. Zhuang, Y. P. Huang, Y. J. Huang, Kuan-Wei Su, Yung-Fu Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We improve the performance of intracavity optical parametric oscillator (IOPO) pumped by a diode-pumped Q-switched Nd:YVO 4/Cr 4+:YAG laser. The IOPO cavity is formed independently by a monolithic KTP crystal that the mirrors are directly deposited on top of the nonlinear crystal. We study the performances of this IOPO cavity with different reflectivity of the output coupler at 1.5 μm (Rs) of 80 and 50%. The average power of 1.5 μm is up to 3.3 W at the maximum pump power of 16.8Wfor both cases. The diode-to-signal conversion efficiency is up to 20%, which is the highest one for IOPOs to our best knowledge. At the maximum pump power, the pulse energies are 41 μJ with the pulse width of 3 ns at a pulse repetition rate (PRR) of 80 kHz for Rs = 80% and 51 μJ with the pulse width of 1.2 ns at a PRR of 65 kHz for Rs = 50%, respectively. The pulse amplitude fluctuations in standard deviation are 2.6% for Rs = 80% and 4% for Rs = 50%, respectively.

Original languageEnglish
Pages (from-to)485-490
Number of pages6
JournalLaser Physics Letters
Volume9
Issue number7
DOIs
StatePublished - 31 Jul 2012

Keywords

  • Diode-pumped
  • Intracavity optical parametric oscillator
  • Passively Q-switched

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