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oai:gredos.usal.es:10366/1460432025-04-30T20:35:55Zcom_10366_133237com_10366_4512com_10366_3823col_10366_133238

Graphene-based Y-branch laser in femtosecond laser written Nd:YAG waveguides Liu, Hongliang Cheng, Chen Romero Vázquez, Carolina Vázquez de Aldana, Javier R. Chen, Feng Femtosecond laser writing Laser crystals Laser sources Optical components Optical networks Q switched lasers We report on Q-switched waveguide lasers on the graphene-based crystalline Y-branch platform. By applying direct femtosecond laser writing of Nd:YAG laser crystal, a surface waveguide splitter with Y-branch geometry has been fabricated with depressed cladding configuration. The Q-switched lasing operation at 1064 nm is achieved in transmission mode, by attaching a two-layer graphene on the resonator output mirror, as well as by using interaction between the evanescent field and a few-layer graphene that was positioned right above the Y-type waveguide. Q-switched laser with a maximum average power of 173 mW, pulse energy and duration of 63 nJ and 90 ns is obtained. This work opens a way for laser-written crystalline devices as compact, direct-pump laser sources for diverse applications. 2021-05-20T07:04:59Z 2021-05-20T07:04:59Z 2015-04 info:eu-repo/semantics/article Hongliang Liu, Chen Cheng, Carolina Romero, Javier R. Vázquez de Aldana, and Feng Chen, "Graphene-based Y-branch laser in femtosecond laser written Nd:YAG waveguides," Opt. Express 23, 9730-9735 (2015) http://hdl.handle.net/10366/146043 10.1364/OE.23.009730 1094-4087 eng FIS2013-44174-P http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional