Mode and wavelength-switchable pulsed fiber laser with few-mode fiber grating

Yu Cai, Zhiqiang Wang, Hongdan Wan, Zuxing Zhang, Lin Zhang

Research output: Contribution to journalArticlepeer-review


We propose and demonstrate a mode and wavelength-switchable pulsed fiber laser using two-mode fiber Bragg grating (TM-FBG) as both transverse mode converter and wavelength selector. The mode-locking mechanism is based on saturable absorption of semiconductor saturable absorption mirror (SESAM). Due to the use of low polarization-dependent mode-locking method, polarization disturbation between mode-locking and transverse-mode selection has been effectively eliminated, thus enabling flexible transverse-mode selection with simultaneous mode-locking operation. Moreover, through the optimized offset launching technique, this laser can operate at the wavelengths of the fundamental mode (LP01) and second-order mode (LP11), and thus export cylindrical vector beams (CVBs) and fundamental mode beams at the TM-FBG output port, respectively. This all-fiber laser is a simple, low-cost and flexible source for mode-division multiplexing system and other applications.
Original languageEnglish
Article number8732358
Pages (from-to)1155-1158
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number14
Early online date6 Jun 2019
Publication statusPublished - 15 Jul 2019

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  • Cylindrical vector beams
  • dual-wavelength
  • mode-locked lasers
  • two-mode fiber Bragg grating


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