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Proceedings Paper

Widely tunable KTP optical parametric oscillator amplifier and its applications to fluorescence-lifetime measurement in Yb-doped laser materials
Author(s): Hiromitsu Kiriyama; Narayanan Srinivasan; Takashi Kimura; Masanobu Yamanaka; Yasukazu Izawa; Tatsuhiko Yamanaka; Sadao Nakai; Chiyoe Yamanaka
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Paper Abstract

The design and construction of an efficient near-infrared holosteric optical parametric oscillator amplifier based on KTiOPO4 (KTP) crystal are reported. The system is tunable from 840 to 1451 nm and generates up to 0.45 mJ at 920 nm with 27% efficiency in 4 - 6 ns pulses. The 532 nm pump source is a frequency doubled laser-diode pumped Nd:YAG laser producing up to 2 mJ in 8 ns, 50 Hz pulses. We have used the system to study the fluorescence lifetimes of Yb:YAG and Yb:glass as a function of wavelength. The data reveal interesting variations in the reabsorption enhanced Yb-ion lifetime. Some Yb:YAG samples exhibiting a sharp increase in their lifetime near the peak absorption wavelengths. The longest lifetime measured in a few mm thick sample of Yb:YAG was 3.3 ms, which would be highly beneficial for energy storage applications using laser diodes.

Paper Details

Date Published: 10 May 1996
PDF: 7 pages
Proc. SPIE 2700, Nonlinear Frequency Generation and Conversion, (10 May 1996); doi: 10.1117/12.239657
Show Author Affiliations
Hiromitsu Kiriyama, Osaka Univ. (Japan)
Narayanan Srinivasan, Osaka Univ. (Japan)
Takashi Kimura, Osaka Univ. (Japan)
Masanobu Yamanaka, Osaka Univ. (Japan)
Yasukazu Izawa, Osaka Univ. (Japan)
Tatsuhiko Yamanaka, Osaka Univ. (Japan)
Sadao Nakai, Osaka Univ. (Japan)
Chiyoe Yamanaka, Institute for Laser Technology (Japan)

Published in SPIE Proceedings Vol. 2700:
Nonlinear Frequency Generation and Conversion
Mool C. Gupta; William J. Kozlovsky; David C. MacPherson, Editor(s)

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