Transformation of the ytterbium laser spectrum with pulsed selective pumping

Yuri V. Senatsky; N. E. Bykovsky; D. V. Ivanov; Sergey I. Mikhailov; A. R. Petrykhin; Iosif G. Zubarev

doi:10.1117/12.380946

3 April 2000 Transformation of the ytterbium laser spectrum with pulsed selective pumping

Yuri V. Senatsky, N. E. Bykovsky, D. V. Ivanov, Sergey I. Mikhailov, A. R. Petrykhin, Iosif G. Zubarev

Proceedings Volume 3889, Advanced High-Power Lasers; (2000) https://doi.org/10.1117/12.380946
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

The Yb-doped crystals and glasses present promising active media for high power lasers. These media are typical of broad gain linewidths -- near 10 nm for Yb:YAG and 100 nm for glasses. The experiments have been performed on pumping Yb- doped YAG and glass samples in a cavity by Nd:YAG laser at 0.94 micrometer. The pumping intensity was 10⁵ divided by 10⁶ W/cm², stored energy density, 1 - 2 J/cm³. For Yb:YAG simultaneous oscillations have been produced at transitions near 1.03 and 1.05 micrometer. The spectral width for both bands reached 3 nm. There was established a competitive character of lasing at these transitions displayed in opposite amplitude modulation of the corresponding oscillation envelopes. The laser spectrum transformation using the interconnection of 1.03 and 1.05 micrometer transitions is discussed. When pumping the Yb-doped silicate glass there were registered the spectra near 1.03, 1.04 and 1.06 micrometer with the total width over 40 nm. A method of the laser spectrum transformation based on the stored energy transfer over inhomogeneously broadened emission line is proposed for Yb glasses. The expected range of the spectrum transformation makes several tens of nm, the transfer rate 10³ - 10⁴s^-1. The obtained results are of interest for the creation of pulse-repetitive laser sources with the spectrum varying from shot to shot.

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Yuri V. Senatsky, N. E. Bykovsky, D. V. Ivanov, Sergey I. Mikhailov, A. R. Petrykhin, and Iosif G. Zubarev "Transformation of the ytterbium laser spectrum with pulsed selective pumping", Proc. SPIE 3889, Advanced High-Power Lasers, (3 April 2000); https://doi.org/10.1117/12.380946

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KEYWORDS

Ytterbium

Glasses

Pulsed laser operation

Ions

Crystals

Nd:YAG lasers

Absorption

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