NDLI: Digital Modulation Characteristics of High-Speed Semiconductor Laser for Use in Optical Communication Systems

Content Provider	Springer Nature Link
Author	Ahmed, Moustafa F. Bakry, Ahmed H. Albelady, Fwoziah T.
Copyright Year	2014
Abstract	We introduce modeling and simulation of digital modulation characteristics of high-speed semiconductor laser and evaluates its performance for use in 40 Gbps communication systems. The study is applied for both the return to zero (RZ) and non-return to zero (NRZ) formats of the modulation current. The modulation characteristics include the waveform of the modulated signal, eye diagram, and frequency chirp. The receiver sensitivity and power penalty associated with the increase in the transmission bit rate are evaluated in the back to back configuration of an optical communication system. The results showed that under 40 Gbps modulation, the modulated laser signal is broadened within the modulation bits as a pseudorandom bit-pattern effect. The laser chirp is in the range of 34–72 GHz, which is expected to combine with fiber dispersion, degrading the performance of high-speed fiber communication systems. Under both the NRZ and RZ modulations, the receiver sensitivity of the communication system increases with the increase in the bit rate. Except for the bit rate of 40 Gbps, the receiver sensitivity is larger under the NRZ modulation than under the RZ modulation. The power penalty associated with increase of the bit rate from 2 to 40 Gbps ranges between 2 and 14 dB.
Starting Page	5745
Ending Page	5752
Page Count	8
File Format	PDF
ISSN	13198025
Journal	Arabian Journal for Science and Engineering
Volume Number	39
Issue Number	7
e-ISSN	21914281
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-04-13
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Digital modulation Chirp Optical communication Semiconductor laser Engineering Science
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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