Scientific Results

Thermo-optical and lasing characteristics of Cr2+-doped CdSe single crystal as tunable coherent source in the mid-infrared

Year: 2017

Authors: Fernandez T.T., Tarabrin M.K., Wang Y., Lazarev V.A., Leonov S.O., Karasik V.E., Korostelin Y.V., Frolov M.P., Podmarkov Y.P., Skasyrsky Y.K., Kozlovsky V.I., Svelto C., Maddaloni P., Coluccelli N., Laporta P., Galzerano G.

Autors Affiliation: 1 Dipartimento di Fisica – Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
2 Bauman Moscow State Technical University, Moscow 105005, Russia
3 P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991, Russia
4 Moscow Institute of Physics and Technology, Moscow 117303, Russia
5 National Research Nuclear University MEPhI, Moscow 115409, Russia
6 Dipartimento di Elettronica, Informazione e Bioingegneria – Politecnico di Milano, Via Ponzio 34/5, 20133 Milan, Italy
7 Istituto Nazionale di Ottica – Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
8 Istituto di Fotonica e Nanotecnologie – Consiglio Nazionale delle Ricerche, Piazza Leonardo da Vinci 32, 20133 Milano, Italy

Abstract: We report on a comprehensive characterization of Cr2+-doped CdSe single crystal as an efficient active material for tunable laser applications in the mid-infrared spectral region. Optical gain, thermo-optical behavior, power efficiency, scalability and wavelength tunability have been thoroughly investigated. Using an antireflection-coated crystal pumped by a Tmfiber laser at at 1.94 μm, 1-W CW output power and 50% slope efficiency at 2.65 μm emission wavelength have been obtained in a diffraction-limited output beam. An output peak power of
2.5 W has been achieved without significant beam distortion in a quasi-CW regime. Exploiting an intra-cavity diffraction grating in a Littrow configuration, a maximum tuning range of 900 nm from 2.22 to 3.12 μm, limited by the finite bandwidth of resonator components, has been demonstrated with an uncoated crystal.

Journal/Review: OPTICAL MATERIALS EXPRESS

Volume: 7 (11)      Pages from: 3815  to: 3825

KeyWords: Diffraction; Efficiency; Infrared devices; Laser applications; Pumping (laser), Diffraction limited; Emission wavelength; Lasing characteristics; Littrow configuration; Mid-infrared spectral regions; Output peak power; Slope efficiencies; Wavelength tunability; Single crystals
DOI: 10.1364/OME.7.003815

Citations: 8
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English