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单频光纤激光器抽运的中红外连续单谐振光学参变振荡器

Mid-Infrared, Singly Resonant and Continuous-Wave Optical Parametric Oscillator Pumped by a Single-Frequency Fiber Laser

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摘要

报道了采用自行研制的全光纤主振荡功率放大(MOPA)结构1064 nm单频Yb光纤激光器抽运掺氧化镁的周期性极化铌酸锂(PPMgLN)晶体实现3.81 μm输出的中红外连续波(cw)单谐振光学参变振荡器(OPO)。单谐振OPO通过e→e+e相位匹配,基于50 mm长,28.5~31.5 μm多周期的PPMgLN晶体(MgO掺杂摩尔分数为5%),选用其中29.5 μm的周期,采用了两镜线性腔结构。在30 ℃的工作温度下,通过49 W的线偏振激光抽运,获得了最大功率4.25 W,波长为3.81 μm的闲频光输出,抽运阈值为5 W,其对应量子转换效率为31.1%。实验还通过改变PPMgLN晶体的工作温度21~170 ℃,获得了中红外波长3. 65~3.82 μm激光输出,测量了相应OPO的输出光谱。通过对比实验所测得中红外光输出波长与两组不同的理论计算结果,发现当晶体工作温度大于110 ℃后,实验测量结果与理论计算结果有一定的偏差,这和实验中晶体在高温区控温精度有一定的关系。

Abstract

A continuous-wave (cw) singly resonant optical parametric oscillator (OPO) with the wavelength of 3.81 μm is obtained by pumping the periodically poled MgOLiNbO3 (PPMgLN) crystal with a homemade Yb single-mode fiber laser at 1064 nm. The laser uses the all optical master oscillator power amplifier (MOPA) structure. The cw singly resonant OPO used the e→e+e phase matching in crystal. The PPMgLN is 50 mm long and the period is from 28.5 μm to 31.5 μm. The cavity is formed of two mirror linear strusture. Pumped by the 49 W linear polarized ligth field at 30 ℃, the idler light 3.81 μm is obtained. It′s maximan power can reach 4.25 W. The threshold value of the pumping laser power is 5 W, corresponding to the output efficiency of 31.1%. When the temperature of the PPMgLN is changed from 21 ℃ to 170 ℃, the wavelength of the output laser changes from 3.65 μm to 3.82 μm. And the corresponding spectrum of OPO is measured. The experiment results are different from the theoretical results when the temperature of the PPMgLN exceeds 110 ℃.

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中图分类号:TN248.1

DOI:10.3788/cjl201239.0102001

所属栏目:激光物理

责任编辑:李文喆  信息反馈

收稿日期:2011-07-27

修改稿日期:2011-09-22

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作者单位    点击查看

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
肖虎:国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
许晓军:国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
姜宗福: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:刘磊(llwm0319@163.com)

备注:刘磊(1981—),男,博士研究生,主要从事中红外光学参变振荡器方面的研究。

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引用该论文

Liu Lei,Li Xiao,Xiao Hu,Xu Xiaojun,Jiang Zongfu. Mid-Infrared, Singly Resonant and Continuous-Wave Optical Parametric Oscillator Pumped by a Single-Frequency Fiber Laser[J]. Chinese Journal of Lasers, 2012, 39(1): 0102001

刘磊,李霄,肖虎,许晓军,姜宗福. 单频光纤激光器抽运的中红外连续单谐振光学参变振荡器[J]. 中国激光, 2012, 39(1): 0102001

被引情况

【1】刘磊,李霄,许晓军,林涛,杨旭,姜宗福. 连续波光参量振荡器定向红外干扰. 强激光与粒子束, 2012, 24(9): 2027-2030

【2】常建华,杨镇博,陆洲,董时超. 一种新型的基于PPLN的多波长中红外激光光源. 中国激光, 2013, 40(10): 1002009--1

【3】常建华,黄秦,顾久驭,王亚炜,尹杰. 基于PPLN温度渐变控制的宽调谐中红外差频产生激光光源. 中国激光, 2013, 40(12): 1202008--1

【4】杨爱粉,张佳,李刚,张晚霞. 用于定向红外对抗的中波红外激光器技术. 应用光学, 2015, 36(1): 119-125

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