Single-frequency Cr:ZnSe laser near 2.689 ?m for high-resolution HD molecule spectroscopy
Year: 2026
Authors: Caruso A., Giannotti D., Canella F., Wu WB., Barberio NS., Aiello R., Maddaloni P., Laporta P., Galzerano G.
Autors Affiliation: Politecn Milan, Dipartimento Fis, Piazza Leonardo Vinci 32, I-20133 Milan, Italy; CNR, Ist Foton & Nanotecnol, Piazza Leonardo Vinci 32, I-20133 Milan, Italy; CNR, Ist Nazl Ott, Via Campi Flegrei 34, I-80078 Pozzuoli, NA, Italy.
Abstract: We report on the realization and comprehensive characterization of a single-frequency Cr2+:ZnSe laser tunable from 2350 to 2750 nm, with optimized performance near 2689 nm, in coincidence with the R(0) transition in the 1-0 rovibrational band of the hydrogen deuteride (HD) molecule. The laser is pumped by an amplified single-frequency laser at 1560 nm, and it is based on a compact linear cavity with a 2-GHz free spectral range. It delivers a maximum output power of 30 mW with an emission linewidth <1.1 MHz over a 1 ms integration time and a relative intensity noise as low as 0.12% in an integration bandwidth from 1 Hz to 100 MHz. The emission frequency can be finely tuned over more than 5 GHz using a fast piezoelectric actuator. (c) 2026 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved. Journal/Review: OPTICS LETTERS
Volume: 51 (14) Pages from: 3878 to: 3881
More Information: Ministero dell’universita e della ricerca (CUP: B53C22004180005, Partenariato esteso 04-PE0023) .KeyWords: Noise; SpectrumDOI: 10.1364/OL.605360
