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Wavelength-tunable, passively mode-locked fiber laser based on graphene and chirped fiber Bragg grating
Xiaoying He1, Zhi-bo Liu, D N Wang
1Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, China.
Abstract:
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.
