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 TypeDr GradeEmail
A AlshahrieAlshahrie, A InvestigatorDoctorateaalshahri@kau.edu.sa
S.W.Z MahmoudMahmoud, S.W.Z ResearcherDoctorate 

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