Title :
Localized saturation of loss grating in complex-coupled DFB laser diodes
Author :
Achtenhagen, M. ; Miles, R.O. ; Reinhart, F.K.
Author_Institution :
IBM Res. Div., Zurich, Switzerland
Abstract :
The longitudinal dependence of the standing-wave envelope in a complex-coupled DFB InGaAsP MQW laser is experimentally investigated. We have observed localized clamping of the luminescence for unstable operating conditions. This local clamping is a consequence of the absorber saturation with increasing injection current and of the short period of the standing-wave envelope that is characteristic for multimode emission. The period can be used as a criterion to distinguish between regions of multimode emission and optical instabilities.
Keywords :
distributed feedback lasers; gallium arsenide; gallium compounds; indium compounds; laser modes; laser stability; optical couplers; optical saturable absorption; photoluminescence; quantum well lasers; InGaAsP; absorber saturation; complex-coupled DFB InGaAsP MQW laser; complex-coupled DFB laser diodes; jection current; local clamping; localized clamping; localized saturation; longitudinal dependence; loss grating; luminescence; multimode emission; optical instabilities; short period; standing-wave envelope; unstable operating conditions; Clamps; Diode lasers; Germanium; Gratings; Luminescence; Optical bistability; Optical losses; Optical saturation; Samarium; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
