Yb-doped strictly all-fiber laser actively Q-switched by intermodal acousto-optic modulation |
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Authors: | Villegas I L Cuadrado-Laborde C Díez A Cruz J L Martínez-Gámez M A Andrés M V |
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Institution: | 1.Departamento de Física Aplicada, ICMUV, Universidad de Valencia, Dr. Moliner 50, Burjassot, E-46100, Spain ;2.Centro de Investigaciones en Óptica, Loma del Bosque, 115, Col. Lomas del Campestre, León, 37150, Guanajuato, Mexico ;3.CONICET, P.O. Box 3, Gonnet, 1897, Buenos Aires, Argentina ; |
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Abstract: | We show an actively Q-switched ytterbium-doped strictly all-fiber laser. Cavity loss modulation is achieved in a tapered optical
fiber by core-to-cladding mode-coupling induced by travelling flexural acoustic waves. When the acoustical signal is switched-off,
the optical power losses within the cavity are reduced, and then a laser pulse is emitted. Trains of Q-switched pulses were
successfully obtained at repetition rates in the range 1–10 kHz, with pump powers between 59 and 88 mW, at the optical wavelength
of 1064.1 nm. Best results were for laser pulses of 118 mW peak power, 1.8 μs of time width, with a pump power of 79 mW, at
7 kHz repetition rate. |
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