• 文献标题:   Graphene-based passively Q-switched dual-wavelength erbium-doped fiber laser
  • 文献类型:   Article
  • 作  者:   LUO ZQ, ZHOU M, WENG J, HUANG GM, XU HY, YE CC, CAI ZP
  • 作者关键词:  
  • 出版物名称:   OPTICS LETTERS
  • ISSN:   0146-9592
  • 通讯作者地址:   Xiamen Univ
  • 被引频次:   329
  • DOI:   10.1364/OL.35.003709
  • 出版年:   2010

▎ 摘  要

We demonstrate a compact Q-switched dual-wavelength erbium-doped fiber (EDF) laser based on graphene as a saturable absorber (SA). By optically driven deposition of graphene on a fiber core, the SA is constructed and inserted into a diode-pumped EDF laser cavity. Also benefiting from the strong third-order optical nonlinearity of graphene to suppress the mode competition of EDF, a stable dual-wavelength Q-switching operation has been achieved using a two-reflection peak fiber Bragg grating as the external cavity mirror. The Q-switched EDF laser has a low pump threshold of 6.5 mW at 974 nm and a wide range of pulse-repetition rate from 3.3 to 65.9 kHz. The pulse duration and the pulse energy have been characterized. This is, to the best of our knowledge, the first demonstration of a graphene-based Q-switched laser. (C) 2010 Optical Society of America