Optical frequency combs / Frequency stabilized lasers and applications (1)

[ALPS18-02] Highly Sensitive and Practical Mid-infrared Dual-comb Spectroscopy using Dual-comb Fiber Laser with Long-term Coherent Averaging

*Akifumi Asahara¹, Gakuto Fukawa¹, Takayuki Shimizu¹, Takashi Kato¹, Kaoru Minoshima¹ (1. The Univ. of Electro-Communications)

Highly sensitive and practical mid-infrared dual-comb spectroscopy based on a bidirectional dual-comb fiber laser is demonstrated. By implementing real-time and long-term coherent averaging, MIR gas spectroscopy with absolute wavelength is achieved without complex tight-locking system.