Open AccessCavity ring-down spectroscopy based on a comb-locked optical parametric oscillator source
Author(s) -
Z.-T. Zhang,
Chuanfu Cheng,
Yuxi Sun,
A.-W. Liu,
S.-M. Hu
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.404944
Subject(s) - cavity ring down spectroscopy , spectroscopy , laser linewidth , optical parametric oscillator , optics , molecular spectroscopy , near infrared spectroscopy , materials science , sensitivity (control systems) , physics , infrared spectroscopy , optoelectronics , laser , quantum mechanics , electronic engineering , engineering
Spectroscopy of molecules in the mid-infrared (MIR) region has important applications in various fields, such as astronomical observation, environmental detection, and fundamental physics. However, compared to that in the near-infrared, precision spectroscopy in the MIR is often limited by the light source and has not shown full potential in sensitivity. Here we report a cavity ring-down spectroscopy system using a tunable narrow-linewidth optical parametric oscillator, which fulfills the requirement of high sensitivity and high precision in the MIR region. The Lamb-dip spectrum of the N 2 O molecule at 2.7 μm was measured as a demonstration of spectroscopy in the MIR with kilohertz accuracy.