A pulsed Nd:GdYNbO4 laser based on transition metal dichalcogenides WS2 and MoS2. (September 2019)

• Record Type: Journal Article
• Authors: Ma, Yufei; Peng, Zhenfang; Ran, Baofa; Ding, Shoujun; Sun, Haiyue; Peng, Fang; Zhang, Qingli; Tittel, Frank K.
• Is Part Of: Optics & laser technology. Volume 117(2019)
• Page Start: 1
• Page End: 5
• Publication Date: 2019-09
• Subjects: Two-dimension material -- Mixed crystal -- Nd:GdYNbO4 -- Molybdenum disulfide -- Tungsten disulfide; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2019.04.008
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: 2D MoS2 and WS2 nanosheets were synthesized by means of a CVD method. A novel Nd:GdYNbO4 mixed crystal was grown and used as laser medium. Pulsed MoS2 /WS2 Nd:GdYNbO4 lasers performance was demonstrated for the first time. Abstract: Utilizing the saturable absorption characteristics of transition metal dichalcogenides (TMDs), a passively Q-switched 1066 nm laser based on a novel Nd:GdYNbO4 mixed crystal as well as a two-dimensional (2D) layered molybdenum disulfide (MoS2 ) and tungsten disulfide (WS2 ) was realized for the first time. The highest repetition rate, the shortest pulse width and maximum peak power were 172 kHz, 723 ns and 0.85 W for Nd:GdYNbO4 /WS2 laser, respectively. The corresponding values for the Nd:GdYNbO4 /MoS2 laser were 122 kHz, 532 ns and 1.63 W. Furthermore, it was found that WS2 required a lower excitation energy, while a MoS2 nanosheet exhibits a deeper modulation depth.