Title :
A new DBR laser structure for improved side-mode suppression
Author :
Habbab, I.M.I. ; Cimini, L.J., Jr.
Author_Institution :
AT&T Bell Labs., Holmdel, NJ, USA
Abstract :
The authors propose and analyze a novel distributed Bragg reflector (DBR) laser structure that exhibits superior side-mode suppression when compared to the well-known DBR laser. This is achieved by introducing a strong symmetry in the reflectivity of the DBR section and results in a high (>36 dB) and ideally constant side-mode suppression ratio as the laser is tuned. This asymmetry in reflectivity can be achieved by nonlinearly chirping the local spatial frequency of a regular (periodic) Bragg grating.<>
Keywords :
distributed Bragg reflector lasers; laser modes; laser tuning; DBR laser structure; distributed Bragg reflector; improved side-mode suppression; laser tuning; local spatial frequency; nonlinear chirping; reflectivity symmetry; regular periodic Bragg grating; Bragg gratings; Chirp; Degradation; Diffraction gratings; Distributed Bragg reflectors; Frequency; Laser modes; Laser tuning; Power generation; Reflectivity;
Journal_Title :
Photonics Technology Letters, IEEE
