Journal
CRYSTALS
Volume 12, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/cryst12020222
Keywords
Bi2Te3; graphene; Q-switched laser; Yb3+; GdAl3(BO3)(4) crystal
Funding
- National Natural Science Foundation of China [11804007]
- Young Talent Fund of University Association for Science and Technology in Shaanxi, China [20200512]
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In this work, a Bi2Te3/graphene heterostructure with good nonlinear absorption characteristics was synthesized and investigated as a saturable absorber for pulsed lasers. The heterostructure showed improved performance compared to pure Bi2Te3 based lasers, demonstrating its potential as a promising saturable absorber for solid-state pulsed lasers emitting at ~1 μm.
Due to the tunable nonlinear optical properties of the Bi2Te3/graphene heterostructure, stable solid state pulsed lasers based on the Bi2Te3/graphene saturable absorber have attracted intensive attention. In this work, the Bi2Te3/graphene heterostructure with good nonlinear absorption characteristics was synthesized by a self-assembly solvothermal route, and the optical saturable absorption properties of the saturable absorber were investigated. Owing to the large modulation depth of Bi2Te3 nanosheets and the high thermal conductivity of graphene, the Bi2Te3/graphene heterostructure saturable absorber shown good nonlinear saturable absorber performance and contributed the improved passively Q-switched Yb3+: GdAl3(BO3)(4) pulsed laser when compared with that of the pure Bi2Te3 based Yb3+: GdAl3(BO3)(4) laser, no matter pulse width or pulse energy. Our work demonstrates that the Bi2Te3/graphene heterostructure was a promising saturable absorber in ~1 mu m solid-state pulsed lasers.
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