Abstract
The applications of graphene thin film as a nonlinear medium and stabilizer to generate a stable multi-wavelength is proposed and demonstrated. A 50m long highly nonlinear photonic crystal fiber (PCF) is incorporated into the cavity to achieve unstable multi-wavelength based on nonlinear polarization rotation (NPR) effect. By introducing the graphene thin film into the cavity, a stable multi-wavelength oscillation is obtained. The laser generates more than 7 lasings with constant spacing of 0.47nm. The output is highly stable with power fluctuation of less than 3dB within a period of 30min. The multi-wavelength EDFL exhibits a tunability from the center wavelength of 1550nm to 1560nm.
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