Open AccessUse of Co2+:MgAl2O4transparent ceramics in passive Q-switching of an Er:Glass laser at 1.534 µm
Author(s) -
Avry Shirakov,
Z. Burshtein,
Adrian Goldstein,
Eugène Frumker,
Amiel A. Ishaaya
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.398246
Subject(s) - materials science , optics , full width at half maximum , laser , thermal expansion , attenuation coefficient , ceramic , brewster's angle , polarizability , q switching , refractive index , integrating sphere , analytical chemistry (journal) , optoelectronics , physics , composite material , chemistry , brewster , quantum mechanics , chromatography , molecule
We present the implementation of Co 2+ :MgAl 2 O 4 transparent ceramics as passive Q-switching elements in an Er:Glass laser at 1.534 µm. Linearly polarized pulsed output was obtained by Brewster angle inclination of the material Q-switching plate relative to the laser axis. Separate pulses were ∼105 ns long (FWHM), exhibiting ∼6.2 kW peak power at near TEM 00 quality. Several fundamental sample properties important for laser intracavity operation were measured; thermo-optic coefficient dn/dT = ( - 3.8 ± 1) × 10 -5 ° C -1 , thermal lensing factor L -1 d(nL)/dT = 2.59 × 10 -5 ° C -1 , linear expansion coefficient α = (3.9 ± 0.6) × 10 -5 ° C -1 , polarizability thermal coefficient ϕ = (7.2 ± 2.2) × 10 -5 ° C -1 , and damage threshold ∼6.5 J/cm 2 .