强激光与粒子束, 2017, 29 (7): 071004, 网络出版: 2017-06-20   

1653 nm光参量放大器及在甲烷遥测方面的应用

1653 nm optical parametric amplifier and its application in remote sensing of CH4
申成 1,2,*刘磊 1,2,3,4王红岩 1,2宁禹 1司磊 1
作者单位
1 国防科学技术大学 光电科学与工程学院, 长沙 410073
2 国防科学技术大学 量子信息学科交叉中心, 长沙 410073
3 中国科学院 光电技术研究所, 成都 610209
4 中国科学院 光学工程重点实验室, 成都 610209
摘要
基于掺氧化镁的周期性极化铌酸锂(MgO: PPLN)晶体,研究了连续波种子光注入结构的光参量放大器(OPA)。采用重复频率为10 kHz、最大平均输出功率为6 W的1064 nm高频脉冲激光作为抽运源,晶体的极化周期为31.02 μm,在119 ℃工作温度下,将连续分布式反馈激光器(DFB)作为种子注入,在1652.3 nm处得到最大平均功率为125 mW的OPA信号光输出,量子转换效率为7.47%。实验通过改变注入种子光波长,实现了信号光nm级范围的调谐输出。信号光通过10 m外甲烷气池,观察到其光谱强度明显下降,初步验证了信号光在甲烷遥测领域的可行性。与用种子光直接检测相比,信号光强度更高,检测距离及灵敏度均有较大优势。
Abstract
Based on magnesium oxide-doped periodically poled lithium niobate (MgO: PPLN) crystal, a second-level optical parametric amplifier (OPA) with continuous-wave(CW) laser injection was studied. Pumped by a 10 kHz, 1064 nm, 6 W(the maximum average output power) high-frequency pulse laser and seeded with a low power distributed feedback (DFB) diode CW laser, the OPA obtained a signal at 1652.3 nm and 119 ℃ with the crystal polarization cycle of 31.02 μm. The maximum average power of the signal was 125 mW with the quantum conversion efficiency of 7.47%. By changing the wavelength of the seed laser, the output wavelength could be adjusted in the nanometer range.When the signal light passed through the methane gas pool at the distance of 10 m, the spectral intensity decreased obviously, and the feasibility of the signal light in the remote sensing of methane was preliminarily verified. Compared with direct detection by the seed light, the intensity of signal light is much higher, and it has great advantages in detection range and sensitivity.

申成, 刘磊, 王红岩, 宁禹, 司磊. 1653 nm光参量放大器及在甲烷遥测方面的应用[J]. 强激光与粒子束, 2017, 29(7): 071004. Shen Cheng, Liu Lei, Wang Hongyan, Ning Yu, Si Lei. 1653 nm optical parametric amplifier and its application in remote sensing of CH4[J]. High Power Laser and Particle Beams, 2017, 29(7): 071004.

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