Two-dimensional PPLN for simultaneous laser Q-switching and optical parametric oscillation in a Nd:YVO4 laser

W. K. Chang, Y. H. Chen, H. H. Chang, J. W. Chang, C. Y. Chen, Y. Y. Lin, Y. C. Huang, S. T. Lin

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We report on a tunable intracavity optical parametric oscillator (IOPO) achieved using a two-dimensional (2D) periodically poled lithium niobate (PPLN) as simultaneously an electro-optic (EO) Bragg Q-switch and an optical frequency mixer (OFM) in a diode-pumped Nd:YVO4 laser. The 2D periodic domain inversion structure is designed to provide two orthogonal reciprocal vectors to respectively satisfy the phase-matching conditions required by the two quasi-phase-matching devices (i.e., the PPLN EO Bragg deflector and the PPLN OFM). At a ∼140-V Q-switching voltage and a 1-kHz switching rate, we obtained a signal wave at 1550 nm with a pulse energy of 9.7 μJ (corresponding to a peak power of ∼2.4 kW) from the IOPO at 9.1-W diode pump power. Simultaneously we also observed multi-wavelength generation from the system originating in the single-pass parametric conversions in the 2D nonlinear photonic crystal structure. Temperature tuning of the IOPO signal wavelength in the eyesafe region was also demonstrated.

Original languageEnglish
Pages (from-to)23643-23651
Number of pages9
JournalOptics Express
Volume19
Issue number24
DOIs
StatePublished - 21 Nov 2011

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