Abstract

Efficient simultaneous intracavity second-harmonic and sum-frequency generation that is free from irregular large amplitude fluctuations (the so-called green problem) is achieved with a laser-diode-pumped ${\mathrm{LiNdP}}_4{\mathrm{O}}_{12}$ (LNP) laser with a type II phase-matching ${\mathrm{KTiOPO}}_4$ crystal. Observed frequency-mixing operations result from the simultaneous single-frequency oscillations on different transitions that arise from the wide fluorescence linewidth in a stoichiometric LNP laser that possesses inherently high Nd concentrations. Sum-frequency generation has been shown to arise from the interaction of oscillating longitudinal modes that belong to different transitions. A promising application to coherent terahertz-wave radiation by use of photomixers is proposed.

© 1999 Optical Society of America

Simultaneous single-frequency oscillations on different transitions in a laser-diode-pumped LiNdP₄O₁₂ laser

Kenju Otsuka, Ryoji Kawai, Yusuke Asakawa, Paul Mandel, and E. A. Viktorov
Opt. Lett. 23(3) 201-203 (1998)

Highly sensitive self-mixing measurement of Brillouin scattering with a laser-diode-pumped microchip LiNdP₄O₁₂ laser

Kenju Otsuka, Ryoji Kawai, Yusuke Asakawa, and Takeki Fukazawa
Opt. Lett. 24(24) 1862-1864 (1999)

High-power diode-pumped Q-switched intracavity frequency-doubled Nd:YVO₄ laser with a sandwich-type resonator

Yung-Fu Chen
Opt. Lett. 24(15) 1032-1034 (1999)

1.5-µm emissions from laser-diode-pumped Nd-doped microchip solid-state lasers

Siao-Lung Hwong, Jyh-Long Chern, Kenju Otsuka, Yu-Hsiang Huang, Ryoji Kawai, and Kazuyoshi Ohki
Opt. Lett. 25(9) 646-648 (2000)

Pulsations induced by quantum interference in a microchip solid-state laser operating on a Λ transiton

Kenju Otsuka, Jing-Yuan Ko, Shin-ichi Higashihara, and Jyh-Long Chern
Opt. Lett. 26(8) 536-538 (2001)