▎ 摘　　要

A novel graphene-enabled electrically tunable optical filter (ETOF) was reported in this work with high voltage response, low power consumption, and wide working bandwidth. A fiber Bragg grating (FBG) was etched in a microfiber using a femtosecond laser, and porous graphene film was coated on the surface of a tapered fiber. Metal electrodes were fabricated using which a voltage was applied to the graphene film to heat the fiber. The wavelength shift of the ETOF has a linear relationship with the applied voltage. The devices illustrated good repeatability and the voltage sensitivity was calculated as 50.36 pm/V. A maximum voltage of 30 V was applied to the devices and a 1.62-nm wavelength shift was observed. The 3-dB bandwidth of the FBG was approximately 0.38 nm, which corresponds to a power consumption of 5.76 mu W in the device. The rising and falling times of the device were measured as 44.2 and 26.7 ms, respectively.