Multifunctional laser media based on Cr4+-doped crystals

Ivan Alexandrov Shcherbakov; Vladimir B. Tsvetkov

doi:10.1117/12.257373

8 November 1996 Multifunctional laser media based on Cr⁴⁺-doped crystals

Ivan Alexandrov Shcherbakov, Vladimir B. Tsvetkov

Proceedings Volume 2965, ALT '96 International Symposium on Laser Methods for Biomedical Applications; (1996) https://doi.org/10.1117/12.257373
Event: ALT '96 International Symposium: Laser Methods for Biomedical Applications, 1996, Heraklion, Crete, Greece

Abstract

Results of application of the Cr4+ doped crystals as Q- switches and nonlinear media for four-wave mixing in Nd- lasers are presented. Cr4+ centers demonstrate unique properties which give rise to use of the Cr4+ doped crystals both as active media and passive elements of laser resonators. Lasers based on these active media demonstrate tunable lasing in the near infrared range 1.1-1.6 microns. This spectral region is very interesting for environmental monitoring applications. Passive elements made of the Cr4+ doped crystals are mainly used as Q-switches for Nd- lasers operating in 1 micron region. Another possibility is to use these elements for preventing lasing in 1 micron range to make more easy the operation of Nd-lasers on the weak transitions. Both these wavelength are very interesting for medical applications. In this case Cr4+ centers can be formed directly in the active rod. So the rods with combination of active and passive properties could be produced. The newest form of applications of crystals with Cr4+ centers is the use of it as nonlinear media for four-wave mixing in Nd-lasers. New optical schemes of resonators, designed to use these modern decision, enable us to create Nd-lasers with a very low beam divergence which can be used for lidars to monitor the pollutions.

Citation Download Citation

Ivan Alexandrov Shcherbakov and Vladimir B. Tsvetkov "Multifunctional laser media based on Cr⁴⁺-doped crystals", Proc. SPIE 2965, ALT '96 International Symposium on Laser Methods for Biomedical Applications, (8 November 1996); https://doi.org/10.1117/12.257373

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