在670纳米和395纳米附近对二氧化氮进行可调谐二极管激光吸收测量。

Tunable diode-laser absorption measurements of NO(2) near 670 and 395 nm.

作者信息

Mihalcea R M, Baer D S, Hanson R K

出版信息

Appl Opt. 1996 Jul 20;35(21):4059-64. doi: 10.1364/AO.35.004059.

DOI:10.1364/AO.35.004059

Abstract

Two single-mode diode lasers were used to record high-resolution absorption spectra of NO(2) (dilute in Ar) near 670.2 and 394.5 nm over a range of temperatures (296 to 774 K) and total pressures (2.4 × 10(-2) to 1 atm). A commercial InGaAsP laser was tuned 1.3 cm(-1) at a repetition rate of 1 kHz to record the absorption spectra near 670.2 nm. In separate experiments with a prototype system, an external-cavity GaAlAs laser was frequency doubled with a quasi-phase-matched LiNbO(3) waveguide and tuned 3.5 cm(-1) to record absorption spectra near 394.5 nm. Variations of the spectral absorption coefficients with temperature and pressure were determined from measured spectra.

摘要

使用两台单模二极管激光器，在一系列温度（296至774 K）和总压力（2.4×10⁻²至1个大气压）范围内，记录了稀释于氩气中的NO₂在670.2和394.5 nm附近的高分辨率吸收光谱。一台商用InGaAsP激光器以1 kHz的重复频率调谐1.3 cm⁻¹，以记录670.2 nm附近的吸收光谱。在使用原型系统的单独实验中，一台外腔GaAlAs激光器通过准相位匹配的LiNbO₃波导进行倍频，并调谐3.5 cm⁻¹，以记录394.5 nm附近的吸收光谱。根据测量光谱确定了光谱吸收系数随温度和压力的变化。