High-efficiency room-temperature ZnSe:Fe2+ laser with a high pulsed radiation energy
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Characteristics of a ZnSe:Fe2+ laser operating at room temperature of active polycrystalline elements with large transversal dimensions are investigated. The active elements had a shape of plates with diameters D = 25–63 mm and width of ~4 mm, doped from two sides with iron ions by the diffusion method. The plates were doped in the process of hot isostatic pressing at an argon pressure of 100 MPa and temperature of 1250 °C for 75–151 h. The laser was pumped by a non-chain electrodischarge HF laser operated in a single-pulse mode. The employment of active elements with greater transversal dimensions resulted in a suppressed transversal parasitic oscillation at large diameters of the pumping spot. The generation energy of 1.43 J with the slope efficiency ηslope = 53 % and the total efficiency with respect to the energy absorbed in an active element ηabs ≈ 48 % was obtained on the sample of diameter D = 63 mm.
The work was supported by the RSF Grant № 15-13-10028 in the part concerning development and manufacturing ZnSe:Fe2+ samples and by the Grants RFBR № 15-02-06005 and № 15-08-02562 in the part of developing experimental methods and carrying out investigations.
- 19.S.B. Mirov, V. Fedorov, D. Martyshkin, I. Moskalev, M. Mirov, S. Vasilyev: Advanced Solid State Lasers Conference, Berlin Germany, AW4A.1 (2015)Google Scholar