Open AccessGraphene-based Y-branch laser in femtosecond laser written Nd:YAG waveguides
Author(s) -
Hongliang Liu,
Chen Cheng,
Carolina Romero,
Javier R. Vázquez de Aldana,
Feng Chen
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.009730
Subject(s) - laser , optics , materials science , lasing threshold , femtosecond , waveguide , laser power scaling , optoelectronics , graphene , cladding (metalworking) , resonator , physics , metallurgy , nanotechnology
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.