Abstract
In this work, MoSe2 film is synthesized by the chemical vapor deposition method. Saturable absorber (SA) is assembled with the tapered fiber and MoSe2 films. Q-switched operation is achieved with the MoSe2-based SA. The experimental result reveals that the MoSe2-based SA has excellent saturable absorption characteristic with 23.41% modulation depth. When the pump power is greater than 289.2[Formula: see text]mW, Q-switched all-fiber lasing action is demonstrated. The repetition rate of the Q-switched pulses varies from 185.6 to 252.8[Formula: see text]kHz. The shortest pulse duration is 801.9[Formula: see text]ns, and the largest output energy is 69.3[Formula: see text]nJ. Results indicate that MoSe2 films can provide new opportunities for large-modulation-depth optical modulators in ultrafast photonics.
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