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13 March 2024 High-sensitivity spectroscopy in the mid-infrared with a single-cavity dual-comb OPO
Carolin P. Bauer, Zofia A. Bejm, Michelle K. Bollier, Justinas Pupeikis, Benjamin Willenberg, Ursula Keller, Christopher R. Phillips
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Proceedings Volume PC12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII; PC1286903 (2024) https://doi.org/10.1117/12.3002517
Event: SPIE LASE, 2024, San Francisco, California, United States
Abstract
We present a novel detection scheme for high-sensitivity spectroscopy in the mid-infrared. We use a low-noise and low-complexity dual-comb source based on a PPLN OPO and an Yb:YAG pump. Both the laser and OPO are spatially-multiplexed single-cavity dual-comb sources. At a repetition rate of 250 MHz and ps-long pump pulses, high power per comb line of >120 W is achieved at 3000 nm (idler). The idler is tunable from 2700 nm to 5170 nm. The system enables comb-line-resolved dual-comb spectroscopy measurements in free-running operation. With our detection scheme, we achieve a spectral coefficient SNR/\sqrt\tau > 10000 \sqrt{Hz} (40 dB) at 3 µm.
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Carolin P. Bauer, Zofia A. Bejm, Michelle K. Bollier, Justinas Pupeikis, Benjamin Willenberg, Ursula Keller, and Christopher R. Phillips "High-sensitivity spectroscopy in the mid-infrared with a single-cavity dual-comb OPO", Proc. SPIE PC12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII, PC1286903 (13 March 2024); https://doi.org/10.1117/12.3002517
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KEYWORDS
Optical parametric oscillators
Mid-IR
Spectroscopy
Multiplexing
Signal to noise ratio
Physical coherence
Picosecond phenomena
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