Title :
Tuning range and spectral selectivity of the distributed forward coupled (DFC) laser
Author :
Amann, M.-C. ; Borchert, B. ; Illek, S. ; Wolf, T.
Author_Institution :
Siemens AG, Munich, Germany
Abstract :
The tuning performance and spectral filtering mechanism in the distributed forward-coupled (DFC) laser diode are investigated. This widely tunable device is based on codirectional mode coupling along the entire laser length by a gain/loss grating perturbation. Due to the transverse integration, even rather short (L approximately=300-600 mu m) DFC lasers may achieve side-mode suppression superior to that of previous codirectionally coupled devices over similar tuning ranges. Model calculations yield a tuning range above 100 nm at 1.5- mu m wavelength with a side-mode suppression ratio around 30 dB.<>
Keywords :
diffraction gratings; laser accessories; laser modes; laser tuning; optical filters; semiconductor lasers; 1.5 micron; 30 dB; codirectional mode coupling; gain/loss grating perturbation; side-mode suppression; spectral filtering mechanism; spectral selectivity; transverse integration; tuning performance; Digital-to-frequency converters; Diode lasers; Filtering; Gratings; Laser modes; Laser tuning; Optical coupling; Optical tuning; Tunable circuits and devices; Wavelength measurement;
Journal_Title :
Photonics Technology Letters, IEEE
