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13 March 2024 Harmonic comb generation in mid-infrared quantum cascade laser frequency combs by external cavity optical feedback
Baichuan Huang, Nicholas Kosan, Gerard Wysocki
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Proceedings Volume 12905, Novel In-Plane Semiconductor Lasers XXIII; 1290509 (2024) https://doi.org/10.1117/12.3001227
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
We demonstrate the generation of harmonic comb states in mid-infrared quantum cascade laser frequency combs by optical feedback injection from an external cavity. A Vernier-like method is presented to control the order of generated harmonic states up to the 6th order. In addition to increased repetition rates, such external cavity induced harmonic states also offer increased optical bandwidth and higher comb coherence. This scheme is easy to implement in spectroscopic systems based on quantum cascade laser frequency combs that can take advantage of these improved parameters.
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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Baichuan Huang, Nicholas Kosan, and Gerard Wysocki "Harmonic comb generation in mid-infrared quantum cascade laser frequency combs by external cavity optical feedback", Proc. SPIE 12905, Novel In-Plane Semiconductor Lasers XXIII, 1290509 (13 March 2024); https://doi.org/10.1117/12.3001227
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KEYWORDS
Quantum cascade lasers
Frequency combs
Optical coherence
Mid infrared
Spectroscopy
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