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2016•Chinese Journal of LasersRequires access

Characteristics of Single Resonant Nanosecond Pulse Optical Parametric Oscillator with Output Wavelength of 2.05 μm

谢小兵 Xie Xiaobing, 李世光 Li Shiguang, 朱小磊 Zhu Xiaolei, 张俊旋 Zhang Junxuan, 董怡静 Dong Yijing, 陈卫标 Chen Weibiao

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Abstract

A KTP crystal extra-cavity single-resonant optical parametric oscillator (OPO) pumped by 1064 nm single-frequency laser is reported, and the nanosecond laser pulse output with wavelength of 2.05 μm is obtained. In the plane-parallel cavity, two type II phase-matched KTP crystals are placed in walk-off-compensated mode. When the pump single pulse energy reaches 5 mJ at repetition frequency of 400 Hz, a 2.05 μm signal laser output with single pulse energy of 0.9 mJ is obtained, whose pulse width is about 3.7 ns, the corresponding conversion efficiency is about 18% from pump light to signal light, and the beam quality factor M2are 2.08, 3.03 in x, y directions, respectively. ? 2016, Chinese Lasers Press. All right reserved.

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What this paper is about

A KTP crystal extra-cavity single-resonant optical parametric oscillator (OPO) pumped by 1064 nm single-frequency laser is reported, and the nanosecond laser pulse output with wavelength of 2.05 μm is obtained. In the plane-parallel cavity, two type II phase-matched KTP crystals are placed in walk-off-compensated mode. When the pump single pulse energy reaches 5 mJ at repetition frequency of 400 Hz, a 2.05 μm signal laser output with single pulse energy of 0.9 mJ is obtained, whose pulse width is about 3.7 ns, the corresponding conversion efficiency is about 18% from pump light to signal light, and the beam quality factor M2are 2.08, 3.03 in x, y directions, respectively. ? 2016, Chinese Lasers Press. All right reserved.

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Available abstract

A KTP crystal extra-cavity single-resonant optical parametric oscillator (OPO) pumped by 1064 nm single-frequency laser is reported, and the nanosecond laser pulse output with wavelength of 2.05 μm is obtained. In the plane-parallel cavity, two type II phase-matched KTP crystals are placed in walk-off-compensated mode. When the pump single pulse energy reaches 5 mJ at repetition frequency of 400 Hz, a 2.05 μm signal laser output with single pulse energy of 0.9 mJ is obtained, whose pulse width is about 3.7 ns, the corresponding conversion efficiency is about 18% from pump light to signal light, and the beam quality factor M2are 2.08, 3.03 in x, y directions, respectively. ? 2016, Chinese Lasers Press. All right reserved.

Key concepts: Nanosecond, Optical parametric oscillator, Parametric oscillator, Pulse (music), Wavelength, Parametric statistics, Optics, Optical parametric amplifier

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