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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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
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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