Surface-emitting THz quantum cascade laser frequency comb with tunable external mirror dispersion compensation

Autor: Digiorgio Valerio, Senica Urban, Micheletti Paolo, Beck Mattias, Faist Jérôme, Scalari Giacomo
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: EPJ Web of Conferences, Vol 287, p 07028 (2023)
Druh dokumentu: article
ISSN: 2100-014X
DOI: 10.1051/epjconf/202328707028
Popis: We present a surface emitting THz quantum cascade laser frequency comb with an adjustable chromatic dispersion compensation via a mechanically tunable GTI cavity. Surface emission and high optical feedback into the laser cavity are achieved by a planarized ridge waveguide design with low reflectivity facets and two broadband patch array antennas for coupling to an external mirror (back side) and for power extraction (front side). We demonstrate direct and reproducible manipulation of the frequency comb state, specifically the comb stability and beatnote frequency tuning, by controlling the position of an external movable mirror.
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