Title :
Optimization of multiple exposure gratings for widely tunable lasers
Author :
Sarlet, G. ; Morthier, G. ; Baets, R. ; Robbins, D.J. ; Reid, D.C.J.
Author_Institution :
Dept. of Inf. Technol., Ghent Univ., Belgium
Abstract :
A theoretical study of the reflection spectra of multiple holographic exposure distributed Bragg reflector gratings is presented. We will show that such a grating can exhibit a uniform reflection comb if the relative phases of the superimposed gratings are well chosen. The tolerances on the optimal phases are of the order of 0.09 radians for six superimposed gratings to 0.04 radians for ten gratings.
Keywords :
distributed Bragg reflector lasers; holographic gratings; laser tuning; optical transmitters; optimisation; reflectivity; semiconductor lasers; wavelength division multiplexing; multiple exposure grating optimisation; multiple holographic exposure distributed Bragg reflector gratings; optimal phase; reflection spectra; superimposed grating relative phases; theoretical study; uniform reflection comb; widely tunable lasers; Bragg gratings; Etching; Frequency; Holography; Laser tuning; Optical reflection; Optical waveguides; Semiconductor lasers; Tunable circuits and devices; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
