Mid-infrared saturated absorption spectroscopy inside a hollow glass waveguide

D. N. Patel, Tingdong Cai, Tzu Han Su, Chin Chun Tsai, Nan Kuang Chen, Hsiang Chen Chui, Jow Tsong Shy

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1 Citation (Scopus)

Abstract

We report the saturation spectroscopy of carbon dioxide inside a hollow glass waveguide (GW) using a tunable mid-infrared difference frequency generation (DFG) source. This DFG source was generated in a periodically poled lithium niobate crystal with a tuning range from 3.97 to 4.71μm. Saturated spectroscopy was performed on the R(60) transition of CO20001 ← 0000 band at 4.2μm inside a hollow GW of diameter 300μm and length 1 m. The saturation dip signal was found with a pump power as low as 0.18 mW inside the hollow GW. The linewidth of the dip was determined to be 4.40 MHz.

Original languageEnglish
Article number125695
JournalOptics Communications
Volume467
DOIs
Publication statusPublished - 2020 Jul 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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