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Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
Study of the optical feedback-induced noise in semiconductor lasers and applications to the optic disc system
Study of the optical feedback-induced noise in semiconductor lasers and applications to the optic disc system
Subject
:
physics
Document Language
:
English
Abstract
:
The dynamics and noise of semiconductor lasers under optical feedback (OFB) have been simulated. The study is performed as applied to an optic-disc system in which laser radiation is reflected by the disc surface and re-injected into the laser cavity. We examine the possibility of suppressing OFBinduced noise in the optic-disc system by the technique of superposition of high-frequency current. The study is based on numerical integration of the time-delay rate equations of semiconductor lasers under OFB. The laser noise is evaluated in terms of the spectral profile of relative intensity noise (RIN). It is shown that RIN is enhanced when states of chaos are generated, and attains minimum levels under continuous-wave operation just before the laser starts the route to chaos. The suppression of RIN in the low-frequency regime is achieved when the superposition-current frequency exceeds the laser resonance frequency by factors of 0.8, 1.0, and 1.1 and when the modulation depth exceeds 0.4.
ISSN
:
1541-308X
Journal Name
:
PHYSICS OF WAVE PHENOMENA
Volume
:
22
Issue Number
:
14
Publishing Year
:
1435 AH
2014 AD
Article Type
:
Article
Added Date
:
Thursday, August 3, 2017
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
A Ahmed
Ahmed, A
Investigator
Doctorate
Safwat W. Z Mahmoud
Mahmoud, Safwat W. Z
Researcher
Doctorate
Files
File Name
Type
Description
42462.pdf
pdf
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