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基于周期极化掺镁铌酸锂晶体的中红外同步抽运皮秒光参量振荡器

Mid-Infrared Synchronously Pumped Picosecond Optical Parametric Oscillator Based on PPMgLN Crystal

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摘要

采用全光纤主振荡功率放大(MOPA)结构皮秒脉冲激光器作为抽运源,搭建同步抽运光参量振荡器(OPO),实现了中红外波段的皮秒脉冲激光输出。光纤激光器输出脉冲重复频率为52 MHz,脉宽约20 ps,中心波长1064 nm。使用一块长50 mm、极化光栅周期为30.5 μm的周期极化掺镁铌酸锂(PPMgLN)作为非线性频率转换晶体,采用信号光单谐振腔结构,在抽运功率5.2 W时获得了平均功率为0.67 W的闲频光输出,中红外参量转换效率为12.9%,斜率效率达14.5%。通过改变晶体温度的方式实现了输出波长在1.544~1.608 μm(信号光)和3.15~3.42 μm(闲频光)范围内的调谐。从腔长同步匹配的角度讨论了该OPO系统的输出稳定性。

Abstract

A picosecond mid-infrared optical parametric oscillator (OPO) synchronously pumped by an Yb-doped fiber laser is reported. The OPO is pumped by an all fiber master oscillator power amplifier (MOPA) centered at 1064 nm picosecond pulses with duration of 20 ps at a repetition rate of 52 MHz. A 50 mm periodically poled MgO-doped LiNbO3 (PPMgLN) with a poled grating period of 30.5 μm is used as the nonlinear crystal and a single resonant cavity is adopted. At room temperature, 0.67 W average idler is obtained at pump power of 5.2 W with the conversion efficiency from pump to idler being 12.9% and the slope efficiency being 14.5%. By controlling the temperature of PPMgLN crystal, the wavelength tuning range can cover 1.544~1.608 μm (singal) and 3.15~3.43 μm (idler). Additionally, the stability of this OPO system is discussed.

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中图分类号:O437.4

DOI:10.3788/cjl201138.1202003

所属栏目:激光物理

责任编辑:宋梅梅  信息反馈

基金项目:国家自然科学基金(61077076,61007037,10904173)和教育部新世纪优秀人才支持计划(NCET-08-142)资助课题。

收稿日期:2011-07-30

修改稿日期:2011-09-01

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刘通:国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
汪晓波:国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
刘磊:国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
李霄:国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
侯静:国防科学技术大学光电科学与工程学院, 湖南 长沙 410073

联系人作者:刘通(liutong719@163.com)

备注:刘通(1988—),男,硕士研究生,主要从事光纤激光与非线性频率变换等方面的研究。

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引用该论文

Liu Tong,Wang Xiaobo,Liu Lei,Li Xiao,Hou Jing. Mid-Infrared Synchronously Pumped Picosecond Optical Parametric Oscillator Based on PPMgLN Crystal[J]. Chinese Journal of Lasers, 2011, 38(12): 1202003

刘通,汪晓波,刘磊,李霄,侯静. 基于周期极化掺镁铌酸锂晶体的中红外同步抽运皮秒光参量振荡器[J]. 中国激光, 2011, 38(12): 1202003

被引情况

【1】周钰杰,冯力群,孙军强. 掺镁铌酸锂晶体的ICP刻蚀性能. 中国激光, 2012, 39(9): 906001--1

【2】赵刚,蒋旭东,吕新杰,秦亦强. 基于光学超晶格的四波长近-中红外光参量振荡器. 中国激光, 2015, 42(5): 502004--1

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