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Q: Fachverband Quantenoptik und Photonik
Q 34: Quantum Technologies – Sensing I
Q 34.1: Invited Talk
Wednesday, March 4, 2026, 14:30–15:00, P 5
Spectral Peaked Optical Frequency Comb for Highly Sensitive Cavity Ring-down Spectroscopy — •Hideki Tomita1, Norihiko Nishizawa1, Shotaro Kitajima1, Ryohei Terabayashi1, Ningwu Liu1, and Hisashi Abe2 — 1Nagoya University, Nagoya, 464-8603, Japan — 2National Metrology Institute of Japan, AIST, Tsukuba, 305-8563, Japan
Optical frequency combs represent a breakthrough in many research fields. To apply the comb to highly sensitive cavity-enhanced spectroscopy such as cavity ring-down spectroscopy, a specific mode of the comb must be selected and efficiently coupled to a high-finesse optical cavity. We have developed a spectrally peaked optical frequency comb using the novel phenomenon of spectral peaking (N. Nishizawa, et al., Advanced Photonics Research, (2025) https://doi.org/10.1002/adpr.202500022). In this comb, the background pedestal components of the generated spectral peaks can be suppressed. This presentation discusses the principle and fundamental characteristics of the spectral peaked optical frequency comb and shows current progress in its application to cavity ring-down spectroscopy and the future prospects.
Keywords: Optical Frequency Comb; Cavity Ring-down Spectroscopy