Journal
OPTICS EXPRESS
Volume 23, Issue 8, Pages 9730-9735Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.009730
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Funding
- National Natural Science Foundation of China [11274203]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20130131130001]
- Ministerio de Economia y Competitividad, Spain [FIS2013-44174-P]
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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. (C) 2015 Optical Society of America
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