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Proceedings Paper

Tunable actively Q-switched fiber laser based on fiber Bragg grating
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Paper Abstract

We report a tunable actively Q-switched fiber laser. A Fabry-Perot cavity is formed by a tunable fiber Bragg grating and two short-wave pass dichroic mirrors, (SWP-0-R1550-T1064-0525-C) and (SWP-45-RU1550- TU1064-PW-0525-C) incident angles, with high reflectivity (<99.5%) at 1550-nm and high transmission (<90%) at 1064-nm. The Er3+/Yb3+ double-clad fiber was pumped by a high power diode laser (JOLD-30-FC-12-976). The diode laser has output fiber with a core diameter and numerical aperture of 200-μm and 0.22, respectively. The Er3+/Yb3+ fiber has a core diameter of 7-μm and numerical aperture of 0.17. The pump was coupled into the doped fiber through the collimating aspherical lens with focal distance 18-mm, 45° dichroic mirror, focusing aspheric lens with focal distance of 8-mm, and a 7.5° cleave at one end of the doped fiber. The use of aspherical lenses allows reducing the spherical aberration caused by the large numerical aperture of the fibers and increasing the coupling efficiency for both pump and signal. An acousto-optic IR modulator with a diffraction efficiency of <60% at first order was inserted in the cavity. The pump power used in experiments was limited to a maximum power of 5-W. The laser was tunable over 5-nm in the wavelength region of 1550-nm with a wavelength selectivity of 0.8-nm from 1549 to 1544-nm. The Q-switch operation was achieved at pulse repetition rate of 120- kHz. Average output power was 1-W at 5-W of pump with a pulse duration of 530-ns.

Paper Details

Date Published: 26 February 2013
PDF: 8 pages
Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 86012C (26 February 2013); doi: 10.1117/12.2002854
Show Author Affiliations
A. González-García, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Instituto Tecnológico Superior de Guanajuato (Mexico)
B. Ibarra-Escamilla, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
E. A. Kuzin, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
M. Durán-Sánchez, Univ. Tecnológica de Puebla (Mexico)
O. Pottiez, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
F. Maya-Ordoñez, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)

Published in SPIE Proceedings Vol. 8601:
Fiber Lasers X: Technology, Systems, and Applications
Sami T. Hendow, Editor(s)

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