Abstract
A simple tunable and switchable dual-wavelength fiber laser at room temperature based on a polarization-maintaining fiber Bragg grating (PM-FBG) is demonstrated experimentally. Experimental results show stable dual-wavelength mode or wavelength switching modes with a dual-wavelength lines spacing of 0.23 nm to 0.43 nm adjusted by a polarization controller (PC). Tuning of the lasing lines around 4.3 nm is performed by applying axial strain to the PM-FBG using a simple structured linear laser cavity.
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