Mode-locked erbium-doped fiber laser based on stable narrow-gap semiconductor Nb2SiTe4 quantum dots

IF 4.6 2区物理与天体物理 Q1 OPTICS Optics and Laser Technology Pub Date : 2024-10-29 DOI:10.1016/j.optlastec.2024.112034

Hai-Jie Zhang , Shun Gu , Hui Long , Min-Ru Wen , Hua-Feng Dong , Li-Li Tao , Xin Zhang , Fu-Gen Wu , Li Chen

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Abstract

Nb₂SiTe₄ (NST) has been shown air-stable with narrow band gap, high electron mobility, excellent absorption properties, and anisotropic optical properties. In this research, liquid phase exfoliation method was employed to prepare NST QDs which were subsequently applied to the tapered fiber to form saturable absorbers for erbium-doped fiber laser. A two-armed balanced probing system was used to assess the nonlinear optical properties, resulting a saturation intensity of 2.36 KW/cm² and a modulation depth of 9.56%. Following the implementation of the NST QDs-SA to Er-doped fiber laser (EDFL) system, stable mode-locked pulses were produced exhibiting the center wavelength of 1574.43 nm, the repetition frequency of 21.50 MHz, and the pulse duration of 747 fs. Those results demonstrate the potential of NST as a narrowband SA, offering new avenues for the design of air-stable ultrafast photonic devices.

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基于稳定窄隙半导体 Nb2SiTe4 量子点的模式锁定掺铒光纤激光器

Nb2SiTe4（NST）具有空气稳定性、窄带隙、高电子迁移率、优异的吸收特性和各向异性的光学特性。本研究采用液相剥离法制备了 NST QDs，随后将其应用于锥形光纤，形成掺铒光纤激光器的可饱和吸收体。利用双臂平衡探测系统评估了非线性光学特性，结果发现饱和强度为 2.36 KW/cm2，调制深度为 9.56%。将 NST QDs-SA 应用于掺铒光纤激光器（EDFL）系统后，产生了稳定的锁模脉冲，中心波长为 1574.43 nm，重复频率为 21.50 MHz，脉冲持续时间为 747 fs。这些结果证明了 NST 作为窄带 SA 的潜力，为设计空气稳定的超快光子器件提供了新的途径。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems