Mid-IR lasing of Cr:ZnSe/As2S3:As2Se3 composite materials

D. V. Martyshkin; V. V. Fedorov; J. T. Goldstein; S. B. Mirov

doi:10.1117/12.875591

15 February 2011 Mid-IR lasing of Cr:ZnSe/As₂S₃:As₂Se₃ composite materials

D. V. Martyshkin, V. V. Fedorov, J. T. Goldstein, S. B. Mirov

Proceedings Volume 7912, Solid State Lasers XX: Technology and Devices; 79121I (2011) https://doi.org/10.1117/12.875591
Event: SPIE LASE, 2011, San Francisco, California, United States

Abstract

Compact solid-state laser systems based on chromium doped II-VI semiconductor materials (ZnS, ZnSe, CdSe) with tunability over 2-3.6 μm, output power exceeding 10W, and efficiency up to 70% were demonstrated recently. A further increase of the output power requires a thorough thermal management of the active element. Fiber geometry of gain element is very promising among other different approaches to control beam quality and thermal lensing. The proposed transition metal doped ZnS:ZnSe/As2S3:As2Se3 composite materials with index matching of II-VI and V-VI components represent a new way for design of mid-infrared laser active fibers. Chalcogenide glasses have wide transparency range in mid-IR, enable fiber geometry, and their refractive index can be varied from n=2.1 to n=2.5 matching refractive index of ZnS (n=2.26) and ZnSe (n=2.44) crystals and eliminating scattering losses. The II-VI compounds provide a tetrahedral coordination of the chromium ions required for mid-IR lasing. We report the first mid-IR laser active Cr:ZnSe/As₂S₃:As₂Se₃ composites fabrication and room-temperature lasing at 2.4 μm. The Cr:ZnSe/As₂S₃:As₂Se₃ composites were prepared by annealing of the appropriate compounds under vacuum and by casting and drying of Cr:ZnSe microparticles suspension in As₂S₃:As₂Se₃ propylamine solution. All samples demonstrated mid-IR photoluminescence typical for Cr²⁺ ions in ZnSe host. High optical gain and low passive losses in Cr:ZnSe/As₂S₃:As₂Se₃ composite material were demonstrated in random lasing experiments.

Citation Download Citation

D. V. Martyshkin, V. V. Fedorov, J. T. Goldstein, and S. B. Mirov "Mid-IR lasing of Cr:ZnSe/As₂S₃:As₂Se₃ composite materials", Proc. SPIE 7912, Solid State Lasers XX: Technology and Devices, 79121I (15 February 2011); https://doi.org/10.1117/12.875591

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