Widely tunable KTP optical parametric oscillator amplifier and its applications to fluorescence-lifetime measurement in Yb-doped laser materials

Hiromitsu Kiriyama; Narayanan Srinivasan; Takashi Kimura; Masanobu Yamanaka; Yasukazu Izawa; Tatsuhiko Yamanaka; Sadao Nakai; Chiyoe Yamanaka

doi:10.1117/12.239657

10 May 1996 Widely tunable KTP optical parametric oscillator amplifier and its applications to fluorescence-lifetime measurement in Yb-doped laser materials

Hiromitsu Kiriyama, Narayanan Srinivasan, Takashi Kimura, Masanobu Yamanaka, Yasukazu Izawa, Tatsuhiko Yamanaka, Sadao Nakai, Chiyoe Yamanaka

Author Affiliations +

Proceedings Volume 2700, Nonlinear Frequency Generation and Conversion; (1996) https://doi.org/10.1117/12.239657
Event: Photonics West '96, 1996, San Jose, CA, United States

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.

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Hiromitsu Kiriyama, Narayanan Srinivasan, Takashi Kimura, Masanobu Yamanaka, Yasukazu Izawa, Tatsuhiko Yamanaka, Sadao Nakai, and Chiyoe Yamanaka "Widely tunable KTP optical parametric oscillator amplifier and its applications to fluorescence-lifetime measurement in Yb-doped laser materials", Proc. SPIE 2700, Nonlinear Frequency Generation and Conversion, (10 May 1996); https://doi.org/10.1117/12.239657

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KEYWORDS

Luminescence

Ytterbium

Ferroelectric materials

Optical amplifiers

Mirrors

Optical parametric oscillators

Absorption

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