Inverse-Gaussian apodized fiber Bragg grating for dual-wavelength lasing.
A fiber Bragg grating (FBG) with an inverse-Gaussian apodization function is proposed and fabricated. It is shown that such a FBG possesses dual-wavelength narrow transmission peaks and the wavelength spacing between the two peaks is easily controllable during fabrication. Incorporating such a FBG filter into a fiber laser with a linear cavity, we obtain stable dual-wavelength emission with 0.146 nm wavelength spacing. This arrangement provides a simple and low cost way of achieving dual-wavelength fiber laser operation.
Lin
Bo
B
Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
Zhang
Han
H
Tjin
Swee Chuan
SC
Tang
Dingyuan
D
Hao
Jianzhong
J
Tay
Chia Meng
CM
Liang
Sheng
S