Title :
High efficiency widely tunable SGDBR lasers for improved direct modulation performance
Author :
Klamkin, Jonathan ; Hutchinson, John M. ; Getty, Jonathan T. ; Johansson, Leif A. ; Skogen, Erik J. ; Coldren, Larry A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of California, Santa Barbara, CA, USA
Abstract :
We report on two novel approaches to improve the differential quantum efficiency (DQE) of widely tunable 1.55-μm lasers: the bipolar cascade sampled grating distributed Bragg reflector (BC-SGDBR) laser and the gain-levered SGDBR (GL-SGDBR) laser. Each is fabricated on a robust InGaAsP/InP photonic integrated circuit platform. The lasers demonstrate improved direct modulation performance over conventional SGDBR lasers. The BC-SGDBR laser was also monolithically integrated with a semiconductor optical amplifier and photodetector receiver in order to perform wavelength conversion. Error free wavelength conversion at 2.5 Gb/s and improvements in conversion efficiency are demonstrated.
Keywords :
III-V semiconductors; diffraction gratings; distributed Bragg reflector lasers; gallium arsenide; gallium compounds; indium compounds; integrated optics; integrated optoelectronics; laser tuning; monolithic integrated circuits; optical modulation; optical receivers; optical wavelength conversion; photodetectors; semiconductor optical amplifiers; 1.55 mum; 2.5 Gbit/s; InGaAsP-InP; InGaAsP-InP photonic integrated circuit platform; SGDBR lasers; bipolar cascade distributed Bragg reflector; differential quantum efficiency; direct modulation performance; distributed Bragg reflector laser; gain-levered SGDBR laser; high efficiency lasers; monolithically integrated laser; photodetector receiver; sampled grating distributed Bragg reflector; semiconductor optical amplifier; wavelength conversion; widely tunable lasers; Bragg gratings; Distributed Bragg reflectors; Indium phosphide; Optical wavelength conversion; Photonic integrated circuits; Quantum cascade lasers; Robustness; Semiconductor lasers; Semiconductor optical amplifiers; Tunable circuits and devices; Bipolar cascade (BC) laser; gain-levered (GL) laser; sampled grating distributed Bragg reflector (SGDBR) laser; semiconductor laser; wavelength converter;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2005.853846
