Inverse-Gaussian apodized fiber Bragg grating for dual-wavelength lasing

摘要

A fiber Bragg grating (FBG) with an inverse-Gaussian apodization function isproposed and fabricated. It is shown that such a FBG possesses easilycontrollable dual-wavelength narrow transmission peaks. Incorporating such aFBG filter in a fiber laser with a linear cavity, stable dual-wavelengthemission with 0.146 nm wavelength spacing is obtained. It provides a simple andlow cost approach of achieving the dual-wavelength fiber laser operation.