Tunable near-infrared and visible all-solid-state optical parametric oscillator amplifier system based on potassium titanyl phosphate crystal

Narayanan Srinivasan, Takashi Kimura, Hiromitsu Kiriyama, Kanji Nishida, Shigehiro Owaki, Masanobu Yamanaka, Yasukazu Izawa, Sadao Nakai, Chiyoe Yamanaka

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present the design details and performance characteristics of a low-energy all-solid-state near-infrared optical parametric oscillator amplifier (OPOA). The pump source is a laser diode (LD) pumped frequency-doubled Nd:YAG laser with a single mode energy of 4 mJ in 8 ns, 50 Hz pulses. The OPOA system, based on potassium titanyl phosphate (KTP) crystal, features a low pump energy threshold at 532 nm of less than 0.4 mJ, broad tunability from 750 to 1040 nm for the signal and a conversion efficiency of 27% at 920 nm. External cavity second harmonic conversion of the idler to visible green-red light in a type II KTP crystal and of the signal to visible blue-green light in a type I BBO crystal was performed with efficiencies up to 10%. We have used the near-infrared output for wavelength-dependent fluorescence lifetime studies in ytterbium-doped laser materials. We have also used the second harmonic wavelengths between 565-600 nm to measure the transmission of Nd:YAG in a preliminary experiment to demonstrate the utility of the system.

Original languageEnglish
Pages (from-to)4639-4644
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume35
Issue number9 A
DOIs
Publication statusPublished - 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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