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Appl. Sci. 2018, 8(2), 171; https://doi.org/10.3390/app8020171

Self-Q-Switch and CW Operation of a Tunable Dual-Wavelength Er/Yb Double-Clad Fiber Laser

1
Optics Department, Instituto Nacional de Astrofísica, Óptica y Electrónica, L. E. Erro 1, Sta. Ma. Tonantzintla, Puebla 72824, Mexico
2
Consejo Nacional de Ciencia y Tecnología (CONACYT)—Optics Department, Instituto Nacional de Astrofísica, Óptica y Electrónica, L. E. Erro 1, Sta. Ma. Tonantzintla, Puebla 72824, Mexico
3
Facultad de Ciencias Físico Matemáticas, Universidad Autónoma de Nuevo León, Av. Universidad S/N, Ciudad Universitaria, San Nicolás de los Garza, Nuevo León 66455, Mexico
4
Consejo Nacional de Ciencia y Tecnología (CONACYT)—Facultad de Ciencias Físico Matemáticas, Universidad Autónoma de Nuevo León, Av. Universidad S/N, Ciudad Universitaria, San Nicolás de los Garza, Nuevo Leon 66455, Mexico
*
Author to whom correspondence should be addressed.
Received: 15 December 2017 / Revised: 19 January 2018 / Accepted: 22 January 2018 / Published: 25 January 2018
(This article belongs to the Special Issue Erbium-doped Fiber Lasers)
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Abstract

In this paper, a double-clad Er/Yb fiber laser with self-Q-switched and continuous wave operation depending on the pump power range is experimentally demonstrated. The linear cavity is formed on one side by a pair of cascaded tunable fiber Bragg gratings used for the selection and tuning of the generated laser lines. On the opposite side, a fiber optical loop mirror with high birefringence fiber in the loop is used to adjust the intra-cavity losses to obtain dual-wavelength emission by temperature changes on the fiber loop. Continuous wave dual-wavelength laser operation is obtained for tunable separation of the generated laser lines in a range from 1 to 7 nm, maximum output power of 3.6Wwith a pump power of 10Wand laser wavelengths linewidth of ~0.2 nm. Self-Q-switched laser pulses are obtained with low pump power in a range from 322 to 890 mW. Q-switched pulses with minimum pulse duration of ~1.5 _s and maximum pulse energy of ~3.5 _J are obtained. View Full-Text
Keywords: fiber lasers; Q-switched lasers; fiber Bragg gratings; Er/Yb double-clad fibers; fiber optical loop mirror fiber lasers; Q-switched lasers; fiber Bragg gratings; Er/Yb double-clad fibers; fiber optical loop mirror
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Ibarra-Escamilla, B.; Durán-Sánchez, M.; Posada-Ramírez, B.; Prieto-Cortés, P.; Álvarez-Tamayo, R.I.; Kuzin, E.A. Self-Q-Switch and CW Operation of a Tunable Dual-Wavelength Er/Yb Double-Clad Fiber Laser. Appl. Sci. 2018, 8, 171.

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