Title :
An Anti-Symmetric-Sample Grating Structure for Improving the Reconstruction-Equivalent-Chirp Technology
Author :
Shi, Yuechun ; Zhou, Yating ; Li, Simin ; Guo, Renjia ; Lu, Linlin ; Feng, Yijun ; Chen, Xiangfei
Author_Institution :
Microwave-Photonics Technol. Lab., Nanjing Univ., Nanjing, China
Abstract :
This letter presents a novel sampled grating structure for improving reconstruction-equivalent-chirp (REC) technology. The proposed structure has uniform seed grating but with the anti-symmetric-sample structure. It has been found that in such a structure, the wavelengths of the ±1st channels can be both blue-shifted more than 40 nm, but the wavelength of the 0th channel is not changed. When the +1st channel is used as the working channel, the wavelength spacing between the +1st channel and the 0th channel is increased by more than 40 nm. Such a phenomenon will be sure to increase the performance and working bandwidth of the REC-based components such as the REC-based distributed-feedback (DFB) laser/laser array.
Keywords :
diffraction gratings; distributed feedback lasers; optical waveguides; spectral line shift; anti-symmetric-sample grating structure; blue shift; distributed feedback laser arrays; optical waveguides; reconstruction-equivalent-chirp technology; uniform seed grating; wavelength spacing; Bragg gratings; Distributed feedback devices; Finite difference methods; Gratings; Optical waveguides; Semiconductor laser arrays; Time domain analysis; Planar waveguide; sampled grating; tilted grating; wideband operation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2160623
