一种用于乙炔双梳光谱的非稳定飞秒半导体激光器。

An unstabilized femtosecond semiconductor laser for dual-comb spectroscopy of acetylene.

作者信息

Nürnberg Jacob, Alfieri Cesare G E, Chen Zaijun, Waldburger Dominik, Picqué Nathalie, Keller Ursula

出版信息

Opt Express. 2019 Feb 4;27(3):3190-3199. doi: 10.1364/OE.27.003190.

DOI:10.1364/OE.27.003190

Abstract

Dual-comb systems based on two optical frequency combs of slightly different line spacing emerge as powerful tools in spectroscopy and interferometry. Semiconductor lasers have a high impact in continuous-wave tunable laser spectroscopy. Here we demonstrate the first dual-comb interferometer based on a single femtosecond semiconductor laser: a dual-comb modelocked optically pumped external-cavity surface-emitting laser (MIXSEL) ideally suited for a 1 to 10 GHz comb spacing. At a center wavelength of 1.03 µm (9709 cm) we measured acetylene gas transmittance with a resolution of 2.7 GHz in 100 ms with residual errors of less than 3% using thousand comb lines without aliasing effects.

摘要

基于线间距略有不同的两个光学频率梳的双梳系统成为光谱学和干涉测量中的强大工具。半导体激光器在连续波可调谐激光光谱学中具有重大影响。在此，我们展示了首个基于单个飞秒半导体激光器的双梳干涉仪：一种双梳锁模光泵浦外腔表面发射激光器（MIXSEL），非常适合1至10 GHz的梳状间距。在中心波长为1.03 µm（9709 cm）时，我们在100毫秒内以2.7 GHz的分辨率测量了乙炔气体透过率，使用数千条梳状线且无混叠效应，残余误差小于3%。