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Proceedings Paper

New model of analysis of semiconductor laser dynamics under strong optical feedback in fiber communication systems
Author(s): Salah Abdulrhmann; Moustafa Ahmed; Minoru Yamada
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Paper Abstract

We report on a new model of analysis in semiconductor laser dynamics under strong optical feedback (OFB) in fiber communication systems. The model treats the optical feedback due to reflection of the laser light on an external fiber grating as a time-delayed optical field injected to the laser cavity. The model is versatile applicable to an arbitrary strength of optical feedback ranging from weak to strong. The model is applied to stimulate output characteristics and intensity noise in InGaAs lasers pumping fiber amplifiers in a wavelength of 980 nm. Influence of intrinsic fluctuations in the intensity and optical phase of the lasing field on the laser dynamics is taken into account. The time-varying trajectories of the output power are presented over a wide range of the injection current. The simulation results indicated that the laser mainly operates in pulsation under strong optical feedback. Counting the intrinsic fluctuations was found to reduce the OFB-induced instabilities so as to bring the laser faster to its steady state operation. The optical feedback noise is found to be as low as the quantum noise level when the laser is injected well above its threshold level.

Paper Details

Date Published: 25 July 2003
PDF: 12 pages
Proc. SPIE 4986, Physics and Simulation of Optoelectronic Devices XI, (25 July 2003); doi: 10.1117/12.473093
Show Author Affiliations
Salah Abdulrhmann, Kanazawa Univ. (Japan)
Moustafa Ahmed, Minia Univ. (Egypt)
Minoru Yamada, Kanazawa Univ. (Japan)

Published in SPIE Proceedings Vol. 4986:
Physics and Simulation of Optoelectronic Devices XI
Marek Osinski; Hiroshi Amano; Peter Blood, Editor(s)

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