Tin telluride quantum dots as a new saturable absorber for a mode-locked Yb+ doped fiber laser. (October 2021)

• Record Type: Journal Article
• Authors: Qiao, Junpeng; Ahmed, Safayet; Kwong Cheng, Ping; Zeng, Long-Hui; Zhao, Jia; Hong Tsang, Yuen
• Is Part Of: Optics & laser technology. Volume 142(2021)
• Publication Date: 2021-10
• Subjects: Yb+ mode-locked fiber laser -- SnTe -- 2D materials -- Quantum dots; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2021.107258
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: SnTe quantum dots (QDs) were prepared by the UALPE method. A SnTe QDs SA based mode-locked YDFL with pulse width of 265 ps was obtained. This work demonstrated that SnTe is a promising saturable absorber. Abstract: Tin telluride (SnTe), a member of group IV-VI semiconductors, has attracted significant attention due to its super thermoelectricity and ferroelectricity. In addition, SnTe was reported to have a direct bandgap (0.18 eV) and relatively good oxidation resistance, therefore, it has huge application potential in optoelectronics. However, up to now, the study of interaction between light and SnTe is still immature. In this paper, SnTe quantum dots (QDs) were prepared by the ultrasonication assisted liquid-phase exfoliation (UALPE) method and the broadband absorption properties of SnTe QDs were demonstrated. Furthermore, by employing SnTe QDs as a saturable absorber (SA), a stable mode-locked Yb-doped fiber laser (YDFL) with a pulse duration of 265 ps and an output power of 5.68 mW was obtained. Our results demonstrated that SnTe could be a promising candidate in the mode-locked YDFL system and photonic technology application.