材料科学
光学
光纤激光器
饱和吸收
光纤布拉格光栅
光电子学
激光器
横模
保偏光纤
模式扰频器
模式音量
栅栏
单模光纤
光纤
辐射模式
波长
光纤传感器
物理
作者
Yu Cai,Zhiqiang Wang,Hongdan Wan,Zuxing Zhang,Lin Zhang
标识
DOI:10.1109/lpt.2019.2921339
摘要
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.
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