All-laser-microprocessed waveguide Cr:ZnS laser

We report the proof-of-concept of an operational laser active medium with a depressed cladding waveguide manufactured in the volume of a Cr2+:ZnS single-crystalline sample and antireflection microstructures fabricated on its facets exclusively by femtosecond laser processing techniques. This allowed...

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Main Authors: Sorokin, Evgeni, Bushunov, Andrey, Tolstik, Nikolai, Teslenko, Andrei, Einmo, Eskil, Tarabrin, Mikhail, Lazarev, Vladimir, Sorokina, Irina T
Format: Article
Language:English
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Summary:We report the proof-of-concept of an operational laser active medium with a depressed cladding waveguide manufactured in the volume of a Cr2+:ZnS single-crystalline sample and antireflection microstructures fabricated on its facets exclusively by femtosecond laser processing techniques. This allowed us to achieve transmittance in a broad range from 2 to 8 μm, approaching a maximum of over 90% near 2.5 μm, and lasing at 2275 nm at the average output power of 20 mW for the absorbed pump power of 500 mW with the slope efficiency of 5.5 %. This demonstration opens up a route towards the industrial fabrication of compact integrable laser sources and sensors based on II-VI materials.