Abstract
In this paper, an all-fiberized transverse mode-switching method was proposed based on temperature control of few-mode (FM) fiber Bragg gratings (FBGs). Two types of fibers were selected to fabricate the FBG pair in order to match the reflection peaks of the desired mode. The temperature-dependence property of the FM FBGs has been utilized to tune the reflection spectra. Through temperature control, 20 W level output power was obtained when the output laser was switched between the mode and the mode in both an all-fiberized ytterbium-doped laser and a Raman laser, which is increased by orders of magnitude compared with previous demonstrations (almost less than 100 mW).
© 2019 Optical Society of America
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