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Document Details
Document Type
:
Article In Journal
Document Title
:
Multimode modeling of digital modulation in nearly singlemode semiconductor lasers
Multimode modeling of digital modulation in nearly singlemode semiconductor lasers
Subject
:
physics
Document Language
:
English
Abstract
:
We present multimode modeling of the digitalmodulation characteristics of nearly single-mode semiconductor lasers. The model takes into account the mechanisms of spectral suppression of modal gain; namely, symmetric and asymmetric gain suppressions. The digital modulation performance of the laser is quantitatively examined in terms of the turn-on jitter, on-off ratio and a Q-factor. We study the effect of the modulation parameters on the modulation characteristics of the laser. We also clarify the effect of the asymmetric gain suppression on the modulated signals of the oscillating modes. In addition, we examine the validity of modeling the digital modulation of the laser via a single-mode rate equation model. We show that the modulation characteristics improve with an increase in the bias and/or modulation current or with a decrease in the bit rate due to reduction in the bit-pattern effect. The asymmetric gain suppression does not affect the characteristics of the total laser signal, however it enhances the modulation of the nearest modes on the long-wavelength side of the gain spectrum.
ISSN
:
1541-308X
Journal Name
:
PHYSICS OF WAVE PHENOMENA
Volume
:
24
Issue Number
:
2
Publishing Year
:
1437 AH
2016 AD
Article Type
:
Article
Added Date
:
Sunday, August 13, 2017
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
A Alshahrie
Alshahrie, A
Investigator
Doctorate
aalshahri@kau.edu.sa
S.W.Z Mahmoud
Mahmoud, S.W.Z
Researcher
Doctorate
Files
File Name
Type
Description
42592.pdf
pdf
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