Title :
Wavelength-tunable three-electrode DBR laser with a thin-active layer in tuning regions
Author :
Sakano, Shinji ; Oka, Akihiko ; Chinone, Naoki
Author_Institution :
Hitachi Ltd., Tokyo, Japan
Abstract :
A thin-active layer was inserted into the tuning regions of a wavelength-tunable three-electrode DBR (distributed Bragg reflector) laser. The gain of the thin-active layer compensates for the loss in adjacent passive guide layers, and improved the optical output power and spectral linewidth in tuning operations. The total tuning range was over 8 nm and the continuous tuning range was over 1 nm, with an output power increase of 30%.<>
Keywords :
distributed Bragg reflector lasers; laser tuning; optical losses; semiconductor junction lasers; spectral line breadth; InGaAsP-InP; distributed Bragg reflector laser; gain; loss; optical output power; passive guide layers; semiconductor laser; spectral linewidth; thin-active layer; tuning regions; wavelength tunable three electrode DBR laser; Distributed Bragg reflectors; Distributed feedback devices; Laser feedback; Laser tuning; Optical amplifiers; Optical tuning; Optical waveguides; Photonic band gap; Power generation; Refractive index;
Journal_Title :
Photonics Technology Letters, IEEE
