Whispering gallery mode stabilization of quantum cascade lasers for infrared sensing and spectroscopy
Authors: Borri S., Siciliani De Cumis M., Insero G., Santambrogio G., Savchenkov A., Eliyahu D., Ilchenko V., Matsko A., Maleki L., De Natale P.
Autors Affiliation: CNR-INO – Istituto Nazionale di Ottica, Largo E. Fermi 6, Firenze, FI, 50125, Italy; INRIM Istituto Nazionale di Ricerca Metrologica, Torino, I-10135, Italy; INFN, Sezione di Firenze, Sesto Fiorentino, FI, 50019, Italy; OEwaves Inc., 465 North Halstead Street, Pasadena, CA 91107, United States
Abstract: Narrow-linewidth lasers are key elements in optical metrology and spectroscopy. From their spectral purity, the measurements accuracy and the overall quality of collected data critically depend. Crystalline micro-resonators have undergone an impressive development in the last decade, opening new ways to photonics from the mm to the µm scale. Their wide transparency range and high Q-factor make them suitable for integration in compact apparatuses for precision spectroscopy from the visible to the mid-IR. Here, we present our recent results on frequency stabilization and linewidth narrowing of quantum cascade lasers using crystalline Whispering Gallery Mode Resonators for mid-IR precision spectroscopy.
More Information: The authors acknowledge financial support from Extreme Light Infrastructure (ELI) European project and from Laserlab-Europe, Grant Agreement No. 284464, EU 7th Framework Program. OEwaves team acknowledges partial support from Air Force Office of Scientific Research (AFOSR)(FA9550-12-C-0068) and from CNR-INO.KeyWords: Crystalline materials; Laser resonators; Optical resonators; Optical systems; Q factor measurement; Quantum cascade lasers; Resonators; Semiconductor lasers; Spectroscopic analysis; Stabilization, Frequency stabilization; High-resolution spectroscopy; Laser stabilization; Linewidth narrowing; Narrow linewidth lasers; Optical Metrology; Precision spectroscopy; Whispering gallery mode resonator, Whispering gallery modes