Hollow-core fiber enhanced CW CARS of gases

Dongsheng Xiong; Yusi Bai; Xinbing Wang; Duluo Zuo

doi:10.1117/12.2545369

2 March 2020 Hollow-core fiber enhanced CW CARS of gases

Dongsheng Xiong, Yusi Bai, Xinbing Wang, Duluo Zuo

Proceedings Volume 11264, Nonlinear Frequency Generation and Conversion: Materials and Devices XIX; 112641K (2020) https://doi.org/10.1117/12.2545369
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

CW (continuous wave) coherent anti-Stoke Raman spectroscopy (CARS) of gases using a hollow-core photonic crystal fiber (HC-PCF) is demonstrated with gaseous CO₂ as an example. Raman transition is pumped by a tunable dye laser. The seeding stokes light is provided by a home-made ECDL. Both lasers operate in single longitudinal mode. The output radiation from the fiber is filtered and coupled into an imaging spectrometer. Anti-stokes signal is observed with 10 mW pump power and 1 mW stokes power. The peak anti-Stokes signal of ν₁ band of 6 atm CO2 is 59000 CCD counts with the exposure time set to 5 ms. The v₁ and 2v₂ components of the fermi dyad of CO₂ is resolved.

Citation Download Citation

Dongsheng Xiong, Yusi Bai, Xinbing Wang, and Duluo Zuo "Hollow-core fiber enhanced CW CARS of gases", Proc. SPIE 11264, Nonlinear Frequency Generation and Conversion: Materials and Devices XIX, 112641K (2 March 2020); https://doi.org/10.1117/12.2545369

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