注意：用于喷射冷却瞬态物种亚多普勒光谱学的脉冲单纵模光学参量振荡器。

Note: Pulsed single longitudinal mode optical parametric oscillator for sub-Doppler spectroscopy of jet cooled transient species.

作者信息

Zhang Qiang, Zhu Boxing, Zhang Deping, Gu Jingwang, Zhao Dongfeng, Chen Yang

机构信息

CAS Center for Excellence in Quantum Information and Quantum Physics, Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.

出版信息

Rev Sci Instrum. 2017 Dec;88(12):126108. doi: 10.1063/1.5009962.

DOI:10.1063/1.5009962

PMID:29289232

Abstract

We present a pulsed single longitudinal mode optical parametric oscillator that was recently constructed for sub-Doppler spectroscopic studies of transient species in a supersonic slit jet expansion environment. The system consists of a Littman-type grazing-incidence-grating resonator and a KTP crystal and is pumped at 532 nm. By spatially filtering the pump laser beam and employing an active cavity-length-stabilization scheme, a frequency down-conversion efficiency up to 18% and generation of Fourier-transform limited pulses with a typical pulse duration of ∼5.5 ns and a bandwidth less than 120 MHz have been achieved. In combination with a slit jet expansion, a sub-Doppler spectrum of SiC has been recorded at ∼498 nm, showing a spectral resolution of Δν/ν ≈ 6.2 × 10.

摘要

我们展示了一种脉冲单纵模光学参量振荡器，它是最近为在超声速狭缝射流膨胀环境中对瞬态物种进行亚多普勒光谱研究而构建的。该系统由一个利特曼型掠入射光栅谐振器和一块磷酸钛氧钾（KTP）晶体组成，并在532纳米波长下泵浦。通过对泵浦激光束进行空间滤波并采用有源腔长稳定方案，实现了高达18%的频率下转换效率，并产生了傅里叶变换极限脉冲，其典型脉冲持续时间约为5.5纳秒，带宽小于120兆赫。结合狭缝射流膨胀，在约498纳米处记录了碳化硅（SiC）的亚多普勒光谱，显示出光谱分辨率为Δν/ν≈6.2×10。