New elements for laser optics: color centers modified by powerful laser radiation

N. N. Il'ichev

doi:10.1117/12.183125

10 August 1994 New elements for laser optics: color centers modified by powerful laser radiation

N. N. Il'ichev

Proceedings Volume 2096, Lasers in Optical Systems and Devices; (1994) https://doi.org/10.1117/12.183125
Event: Laser Optics, 1993, St. Petersburg, Russian Federation

Abstract

Results of experimental studies of bleaching of F^-₂ color centers (CC) in LiF crystals are presented. Bleaching of these centers was shown to take place in two-photon absorption from the excited state. The effect of bleaching on the emission of neodymium lasers with LiF:F^-₂-passive Q-switches was studied. Phenomenon of spontaneous narrowing of emission spectrum is due to arising in LiF:F^-₂ crystal of absorption grating (caused by destruction of F^-₂ CC), that has spectral-selective properties. Polarization characteristics of nonlinear transmission of YAG:Cr⁴⁺ crystal a model is developed, in which the absorption on the wavelength of 1.06 micrometers occurs due to three linear dipoles oriented along the crystallographic axes.

Citation Download Citation

N. N. Il'ichev "New elements for laser optics: color centers modified by powerful laser radiation", Proc. SPIE 2096, Lasers in Optical Systems and Devices, (10 August 1994); https://doi.org/10.1117/12.183125

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