Chinese Optics Letters, 2018, 16 (2): 020007, Published Online: Jul. 16, 2018
High-power MoTe2-based passively Q -switched erbium-doped fiber laser
Abstract
Materials in the transition metal dichalcogenide family, including WS 2 , MoS 2 , WSe 2 , and MoSe 2 , etc., have captured a substantial amount of attention due to their remarkable nonlinearities and optoelectronic properties. Compared with WS 2 and MoS 2 , the monolayered MoTe 2 owns a smaller direct bandgap of 1.1 eV. It is beneficial for the applications in broadband absorption. In this letter, using the magnetron sputtering technique, MoTe 2 is deposited on the surface of the tapered fiber to be assembled into the saturable absorber. We first implement the MoTe 2 -based Q -switched fiber laser operating at the wavelength of 1559 nm. The minimum pulse duration and signal-to-noise ratio are 677 ns and 63 dB, respectively. Moreover, the output power of 25 mW is impressive compared with previous work. We believe that MoTe 2 is a promising 2D material for ultrafast photonic devices in the high-power Q -switched fiber lasers.
Mengli Liu, Wenjun Liu, Peiguang Yan, Shaobo Fang, Hao Teng, Zhiyi Wei. High-power MoTe2-based passively