Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, China.
Opt Lett. 2012 Jun 15;37(12):2394-6. doi: 10.1364/OL.37.002394.
We demonstrate a wavelength-tunable, passively mode-locked erbium-doped fiber laser based on graphene and chirped fiber Bragg grating. The saturable absorber used to enable passive mode-locking in the fiber laser is a section of microfiber covered by graphene film, which allows light-graphene interaction via the evanescent field of the microfiber. The wavelength of the laser can be continuously tuned by adjusting the chirped fiber Bragg grating, while maintaining mode-locking stability. Such a system has high potential in tuning the mode-locked laser pulses across a wide wavelength range.
我们展示了一种基于石墨烯和啁啾光纤布拉格光栅的波长可调谐、被动锁模掺铒光纤激光器。用于实现光纤激光器被动锁模的可饱和吸收体是一段被石墨烯薄膜覆盖的微光纤，通过微光纤的消逝场实现光与石墨烯的相互作用。通过调整啁啾光纤布拉格光栅，可以连续调谐激光波长，同时保持锁模稳定性。这种系统在调谐横跨宽波长范围的锁模激光脉冲方面具有很大的潜力。
