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Publication
IEEE Photonics Technology Letters
Paper
Localized saturation of loss grating in complex-coupled DFB laser diodes
Abstract
The longitudinal dependence of the standing-wave envelope in a complex-coupled DFB 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.