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Ismael Torres-GóAmez Alejandro MartíAnez-Rios Gilberto Anzueto-SáAnchez Romeo Selvas-Aguilar Alejandrina MartíAnez-Gáamez David MonzóAn-HernáAndez 《Optical Review》2005,12(2):65-68
We propose and demonstrate an all-fiber multi-wavelength switchable double-clad Yb3+-doped fiber laser based on the reflectivity cavity control by induced bend loss. The wavelength switching is realized by a variable reflecting mirror that employs a cascaded array of three high reflection (>99%) fiber Bragg gratings at 1064, 1080 and 1096 nm, with a bending controller inserted between each grating. The order of the Bragg gratings is decided according to the gain profile of the Yb3+-doped fiber and the induced bending loss allows us to select the Bragg-wavelength laser operation. The laser is capable of switching continuously from one wavelength to another, and slope efficiencies over 50% are obtained at each wavelength. 相似文献