Highly Sensitive Dual Comb Spectroscopy Using Background Suppressed Spectral Peaking at λ = 1.65 μm

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This is a Quantitative Study study.

Norihiko Nishizawa; Kozo Kato; Reo Usui; Shotaro Kitajima; Ryohei Terabayashi; Hideki Tomita; Hisashi Abe

doi:10.1364/cleo_si.2025.ss119_4

January 1, 2025

Highly Sensitive Dual Comb Spectroscopy Using Background Suppressed Spectral Peaking at λ = 1.65 μm

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Key Points

A high SNR of 38 dB was achieved using background-suppressed spectral peaking for measuring CH4.
The dual-comb spectroscopy technique showed a large dynamic range of 50 dB during spectral measurements.
This method enhances sensitivity in detecting methane, indicating potential applications in environmental monitoring.
Results show significant improvements in spectral peaking using background suppression, critical for precise measurements.

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Abstract

Highly sensitive dual-comb spectroscopy was demonstrated using background-suppressed spectral peaking. A high SNR of 38 dB and a large dynamic range of 50 dB were achieved for comb mode resolved CH 4 absorption measurement.

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Nishizawa et al. (2025) studied this question.

synapsesocial.com/papers/68d463f131b076d99fa637ce https://doi.org/10.1364/cleo_si.2025.ss119_4

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Highly Sensitive Dual Comb Spectroscopy Using Background Suppressed Spectral Peaking at λ = 1.65 μm

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Highly Sensitive Dual Comb Spectroscopy Using Background Suppressed Spectral Peaking at λ = 1.65 μm

Key Points

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Abstract

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