Photonics Research, 2018, 6 (10): 10000C15, Published Online: Aug. 21, 2018
Nonlinear optical properties of WSe2 and MoSe2 films and their applications in passively Q-switched erbium doped fiber lasers
Abstract
Transition metal dichalcogenides (TMDs) are successfully applied in fiber lasers for their photoelectric properties. However, in previous work, how to improve the modulation depth of TMD-based saturable absorbers (SAs) has been a challenging issue. In this paper, WSe 2 and MoSe 2 SAs are fabricated with the chemical vapor deposition method. Compared with previous experiments, the modulation depths of WSe 2 and MoSe 2 SAs with sandwiched structures are effectively increased to 31.25% and 25.69%, respectively. The all-fiber passively Q -switched erbium doped fiber lasers based on WSe 2 and MoSe 2 SAs are demonstrated. The signal-to-noise ratios of those lasers are measured to be 72 and 57 dB, respectively. Results indicate that the proposed WSe 2 and MoSe 2 SAs are efficient photonic devices to realize stable fiber lasers.
Wenjun Liu, Mengli Liu, Hainian Han, Shaobo Fang, Hao Teng, Ming Lei, Zhiyi Wei. Nonlinear optical properties of WSe2 and MoSe2 films and their applications in passively Q-switched erbium doped fiber lasers[J]. Photonics Research, 2018, 6(10): 10000C15.