Title :
Sampled-grating DBR laser integrated with SOA and tandem electroabsorption modulator for chirp-control
Author :
Johansson, L.A. ; Akulova, Y.A. ; Fish, G.A. ; Coldren, L.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of California, CA, USA
Abstract :
Chirp-controlled optical modulation is demonstrated using a voltage division scheme applied to a long-section phase modulator to compensate for the positive chirp of an electroabsorption modulator arranged in a tandem configuration. Both modulators are integrated with a semiconductor optical amplifier (SOA) and a sampled-grating distributed Bragg reflector (DBR) laser. The effective chirp factor can be controlled from +1 to -0.86 with less than 2 dB penalty in extinction ratio and insertion loss.
Keywords :
amplitude modulation; chirp modulation; distributed Bragg reflector lasers; electro-optical modulation; electroabsorption; integrated optics; laser tuning; optical transmitters; phase modulation; semiconductor optical amplifiers; Franz-Keldysh modulators; chirp-control modulation; effective chirp factor; extinction ratio; insertion loss; integrated SOA; long-section phase modulator; sampled-grating DBR laser; tandem electroabsorption modulator; voltage division scheme; widely tunable lasers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20040016
