LAUSR

Abstract A tunable dual-wavelength fiber ring-cavity laser based on a fiber Bragg grating (FBG) and an external-injected distributed feedback (DFB) laser is proposed and experimentally demonstrated. The wavelength spacing can be tuned by adjusting the operating temperature of the DFB laser. When the FBG works at 40℃ and the injected DFB laser operates at 10℃, a stable dual-wavelength simultaneous oscillation at 1550.32 nm and 1552.40 nm with a wavelength spacing of 2.08 nm is achieved, and a tuning range from 2.08 nm to 5.34 nm is obtained. Our experimental results demonstrate the new concept of dual-wavelength fiber ring-cavity laser with a DFB laser injection and the technical feasibility.