Characteristics of Infrared Pulses Generated by Optical Parametric Oscillator from LiNbO3 Crystal

Soyeon Park, J. W. Wu, Doseok Kim, Bum Ku Rhee, S. H. Park

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1 Citation (Scopus)

Abstract

The optical parametric oscillation (OPO) characteristics of LiNbO3, which is normally pumped by using the 1.064-μm laser output from a nanosecond Nd:YAG laser, were investigated. A 5-cm-long LiNbO3 crystal was cut at θ = 47 °, and the OPO cavity was formed by using two plain mirrors. The output coupler reflectivity in the 1.40-1.60 μm range was 80.0 %, and the back mirror had a reflectivity of 99.5 % in the 1.45-1.55 μm range. At a cavity length of 7 cm and a pump pulse energy of 156 mJ (1.7 times above threshold), the optical parametric oscillator generated nanosecond pulses (signal 1.6 μm and idler 3.18 μm) up to 16 mJ. The change in the output energy was studied as the cavity length was varied from 7 cm to 16 cm at a fixed pump pulse energy of 145 mJ. We also measured the OPO output energy as a function of the reflectivity of the output coupler.

Original languageEnglish
Pages (from-to)766-769
Number of pages4
JournalJournal of the Korean Physical Society
Volume37
Issue number5 Part 2
DOIs
Publication statusPublished - 2000 Nov

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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