High Repetition Rate Electro-Optical-Q-switched Intracavity
Optical Parametric Oscillator¹

J. Wang, X. Chen, H. Zhang, S. Zhao, J. Liang, and P. Wang

School of Physics, University of Jinan, Jinan 250022, China

e-mail: 200210695@sdu.edu.cn

Received July 29, 2011; in final form August 4, 2011; published online November 28, 2011

Abstract—A high repetition rate electro-optical-Q-switched intracavity optical parametric oscillator (IOPO)
is realized by using two RbTiOPO₄ (RTP) crystals as electro-optic (EO) modulator. Three repetitions of the EO
modulator (f_p = 15, 20, and 30 kHz) were applied in the experiment. The pulse width can be minimized to 7ns
when the input energy is 24.4 J at three modulating repetitions. The peak power of the signal light increases
with reducing the pulse repetition rate. By considering the gradual loss from the delayed switched time of the
EO switch, the coupled rate equations of IOPO under the assumption of the uniform distributions of the intra-
cavity photon densities are given and the numerical solution of the equations fits the experimental data well.

DOI: 10.1134/S1054660X12010203

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