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1444-nm Q-switched pulse generator based on Nd:YAG/V:YAG microchip laser

  • Solid State and Liquid Lasers
  • Published:
Laser Physics

Abstract

Q-switched microchip laser emitting radiation at eye-safe wavelength 1444 nm was designed and realized. This laser was based on composite crystal which consists of 4 mm long Nd:YAG active medium diffusion bonded with 1 mm long V:YAG saturable absorber. The diameter of the composite crystal was 5 mm. The initial transmission of the V:YAG part was T 0 = 94% @ 1440 nm. The microchip resonator consists of dielectric mirrors, directly deposited onto the composite crystal surfaces. These mirrors were specially designed to ensure desired emission at 1444 nm and to prevent parasitic lasing at other Nd3+ transmissions. The output coupler with reflectivity 94% for the generated wavelength 1444 nm was placed on the V3+-doped part. The laser was operating under pulsed pumping for the duty-cycle up to 50%. With increasing value of mean pumping power a strong decrease of generated pulse length was observed. The shortest generated pulses were 4.2 ns long (FWHM). Stable pulses with energy 34 μJ were generated with repetition rate up to 1.5 kHz. Corresponding pulse peak power was 8.2 kW. The wavelength of linearly polarized TEM00 laser mode was fixed to 1444 nm.

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Authors and Affiliations

  1. Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehová 7, 115 19, Prague 1, Czech Republic

    J. Šulc, J. Novák & H. Jelínková

  2. Crytur, Ltd. Turnov, Palackého 175, 511 01, Turnov, Czech Republic

    K. Nejezchleb & V. Škoda

Authors
  1. J. Šulc
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  2. J. Novák
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  3. H. Jelínková
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  4. K. Nejezchleb
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  5. V. Škoda
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Correspondence to J. Šulc.

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Original Russian Text © Astro, Ltd., 2010.

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Šulc, J., Novák, J., Jelínková, H. et al. 1444-nm Q-switched pulse generator based on Nd:YAG/V:YAG microchip laser. Laser Phys. 20, 1288–1294 (2010). https://doi.org/10.1134/S1054660X10110216

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  • DOI: https://doi.org/10.1134/S1054660X10110216

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