Graphene/MoS2 heterostructure: a robust mid-infrared optical modulator for Er3+-doped ZBLAN fiber laser
2018
We have prepared the graphene/MoS
2 heterostructure by a hydrothermal method, and presented its nonlinear absorption parameters and application as a nonlinear optical modulator in the mid-infrared region. Using the nonlinear optical modulator, stable passively Q-switched operation of an Er
3+-doped ZrF
4-BaF
2-LaF
3-AlF
3-NaF (ZBLAN) fiber laser at ∼2.8 μ
m can be obtained. The Q-switched Er
3+-doped ZBLAN fiber laser can yield per-pulse energy up to 2.2 μJ with the corresponding pulse width and pulse repetition rate of 1.9 μs and 45 kHz, respectively. Our results indicate that the graphene/MoS
2 heterostructure can be a robust optical modulator for pulsed lasers in the mid-infrared spectral range.
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