Passive Q-switches for diode-pumped laser resonators

Zygmunt Mierczyk; Krzysztof Kopczynski; Zygmunt Frukacz

doi:10.1117/12.402850

4 October 2000 Passive Q-switches for diode-pumped laser resonators

Zygmunt Mierczyk, Krzysztof Kopczynski, Zygmunt Frukacz

Proceedings Volume 4237, Laser Technology VI: Progress in Lasers; (2000) https://doi.org/10.1117/12.402850
Event: Laser Technology VI, 1999, Szczecin, Poland

Abstract

The paper presents the results of investigations on spectroscopic properties of new non-linear absorbers used for diode-pumped laser systems: yttrium-aluminium garnet doped with trivalent vanadium ions and Te doped GaAs semiconductor absorber. In this work we present the result son YAG:V³⁺ single crystal growth and examination of Q-switching of laser resonator in near IR band. YAG single crystals doped with V³⁺ ions of different concentrations were obtained by the Czochralski method. The absorption and emission spectra measurements on those crystals are presented. The as grown crystals have not non- linear absorption bands of V³⁺ ions in tetrahedral positions. After crystals annealing in reducing atmosphere absorption bands in NIR region arise. The investigations of changes in transmission properties of YAG crystals with different concentrations of V³⁺ ions have been carried out as a function of power density of transmitted radiation at 822 nm, 1064 nm, and 1318 nm. Dependence of transmission changes of the GaAs:Te on power density of diagnostic radiation of 1064 nm have been determined. The following parameters of non-linear absorbers were estimated: non-active losses, absorption cross-section, saturation energy, concentration of active centers, relaxation time, and energy losses caused by absorber bleaching. Generation characteristics of YAG:Nd³⁺ laser with GaAs:Te and YAG:V³⁺ modulators have been investigated.

Citation Download Citation

Zygmunt Mierczyk, Krzysztof Kopczynski, and Zygmunt Frukacz "Passive Q-switches for diode-pumped laser resonators", Proc. SPIE 4237, Laser Technology VI: Progress in Lasers, (4 October 2000); https://doi.org/10.1117/12.402850

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