Technical Papers and Presentations

Distributed feedback lasers improve the performance of standard Fabry-Perot laser designs by including a wavelength-selective grating that provides superior output, spectral purity and temperature stability. Laterally-coupled distributed feedback (LC-DFB) lasers with the use of higher order gratings have a grating that has been patterned out of the waveguide ridge which allows for simplified fabrication and monolithic integration with a variety of other photonic devices.

We have developed a technique using COMSOL Multiphysics to calculate the effective coupling coefficient of higher order laterally-coupled gratings. Our application uses a fourth-order grating that will produce a high-performance grating for DFB laser applications.