Monolithically integrated laser Bragg Q-switch and wavelength converter in a PPLN crystal

S. T. Lin, G. W. Chang, Y. Y. Lin, Y. C. Huang, A. C. Chiang, Y. H. Chen

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


We-report a periodically poled lithium niobate (PPLN) crystal for both temperature-insensitive laser Q-switching and temperature-tuned wavelength conversion. The PPLN crystal consists of two sections, a 20.3-μm period section functioning as an electro-optic Bragg grating for Q-switching a diode-pumped Nd:YVO4 laser at 1064 nm and a 31-μm-period section functioning as an optical parametric generator for down converting the generated 1064-nm laser. When driving the PPLN Bragg grating with 170-V voltage pulses, we measured 181 μJ pulse energy at 1064 nm from the Nd:YVO4 laser pumped by 20.4 W diode power. The 181-μJ pulsed laser was further converted into mid-infrared radiation in the monolithic PPLN crystal with 35% parametric efficiency. The wavelengths were broadly tunable in the range of 1.75-1.88 μm (signal) and 2.7-2.44 μm (idler) via temperature without affecting the performance of the PPLN Bragg Q-switch.

Original languageEnglish
Pages (from-to)17093-17098
Number of pages6
JournalOptics Express
Issue number25
StatePublished - 12 Dec 2007


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