Effects of Laser Direct Intensity Modulation Index on Optical Beat Interference in Subcarrier Multiplexed Wavelength Division Multiple Access Networks

Mohammad M. Banat; Mohsen Kavehrad

doi:10.1109/26.380212

Effects of Laser Direct Intensity Modulation Index on Optical Beat Interference in Subcarrier Multiplexed Wavelength Division Multiple Access Networks

Mohammad M. Banat
, Mohsen Kavehrad

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Degradation in carrier-to-interference ratio (CIR) due to optical beat interference (OBI) in subcarrier multiplexed wavelength division multiple Access (SCM/WDMA) networks using direct photodetection is evaluated. The subcarriers are assumed to directly intensity modulate separate lasers. A large signal model for the modulated laser light is used. The discrepancy in CIR between this model and the small signal model commonly used in the literature is important at high modulation indices (4.5 dB at about unity modulation index). This justifies the introduction of the large signal model for analyzing OBI. It is found from analytical results that OBI is lower for higher intensity modulation indices.

Original language	English (US)
Pages (from-to)	1636-1643
Number of pages	8
Journal	IEEE Transactions on Communications
Volume	43
Issue number	234
DOIs	https://doi.org/10.1109/26.380212
State	Published - 1995

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

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10.1109/26.380212

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@article{b05670156ad74ce1bac34a978fdc974f,

title = "Effects of Laser Direct Intensity Modulation Index on Optical Beat Interference in Subcarrier Multiplexed Wavelength Division Multiple Access Networks",

abstract = "Degradation in carrier-to-interference ratio (CIR) due to optical beat interference (OBI) in subcarrier multiplexed wavelength division multiple Access (SCM/WDMA) networks using direct photodetection is evaluated. The subcarriers are assumed to directly intensity modulate separate lasers. A large signal model for the modulated laser light is used. The discrepancy in CIR between this model and the small signal model commonly used in the literature is important at high modulation indices (4.5 dB at about unity modulation index). This justifies the introduction of the large signal model for analyzing OBI. It is found from analytical results that OBI is lower for higher intensity modulation indices.",

author = "Banat, \{Mohammad M.\} and Mohsen Kavehrad",

note = "Funding Information: Paper approved by Matthew S. Goodman, the Editor for Optical Switching of the IEEE Communications Society. Manuscript received: December 16, 1993; revised September 15, 1994. This research was partially supported by the Telecommunications Research Institute of Ontario, Photonics Networks and Systems Thrust, and by the Jordan University of Science and Technology. This work includes portions of a Ph.D. dissertation by M. M. Banat, submitted to School of Graduate Studies and Research at the University of Ottawa in January 1995. M. M. Banat is with the Department of Electrical Engineering, University of Ottawa, Ottawa, Ontario, Canada. He is leaving to the Jordan University of Science and Technology, Irbid, Jordan. M. Kavehrad is with the Department of Electrical Engineering, University of Ottawa, Ottawa, Ontario, Canada. IEEE Log Number 9411629.",

year = "1995",

doi = "10.1109/26.380212",

language = "English (US)",

volume = "43",

pages = "1636--1643",

journal = "IEEE Transactions on Communications",

issn = "0090-6778",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "234",

}

TY - JOUR

T1 - Effects of Laser Direct Intensity Modulation Index on Optical Beat Interference in Subcarrier Multiplexed Wavelength Division Multiple Access Networks

AU - Banat, Mohammad M.

AU - Kavehrad, Mohsen

N1 - Funding Information: Paper approved by Matthew S. Goodman, the Editor for Optical Switching of the IEEE Communications Society. Manuscript received: December 16, 1993; revised September 15, 1994. This research was partially supported by the Telecommunications Research Institute of Ontario, Photonics Networks and Systems Thrust, and by the Jordan University of Science and Technology. This work includes portions of a Ph.D. dissertation by M. M. Banat, submitted to School of Graduate Studies and Research at the University of Ottawa in January 1995. M. M. Banat is with the Department of Electrical Engineering, University of Ottawa, Ottawa, Ontario, Canada. He is leaving to the Jordan University of Science and Technology, Irbid, Jordan. M. Kavehrad is with the Department of Electrical Engineering, University of Ottawa, Ottawa, Ontario, Canada. IEEE Log Number 9411629.

PY - 1995

Y1 - 1995

N2 - Degradation in carrier-to-interference ratio (CIR) due to optical beat interference (OBI) in subcarrier multiplexed wavelength division multiple Access (SCM/WDMA) networks using direct photodetection is evaluated. The subcarriers are assumed to directly intensity modulate separate lasers. A large signal model for the modulated laser light is used. The discrepancy in CIR between this model and the small signal model commonly used in the literature is important at high modulation indices (4.5 dB at about unity modulation index). This justifies the introduction of the large signal model for analyzing OBI. It is found from analytical results that OBI is lower for higher intensity modulation indices.

AB - Degradation in carrier-to-interference ratio (CIR) due to optical beat interference (OBI) in subcarrier multiplexed wavelength division multiple Access (SCM/WDMA) networks using direct photodetection is evaluated. The subcarriers are assumed to directly intensity modulate separate lasers. A large signal model for the modulated laser light is used. The discrepancy in CIR between this model and the small signal model commonly used in the literature is important at high modulation indices (4.5 dB at about unity modulation index). This justifies the introduction of the large signal model for analyzing OBI. It is found from analytical results that OBI is lower for higher intensity modulation indices.

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DO - 10.1109/26.380212

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SN - 0090-6778

VL - 43

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JO - IEEE Transactions on Communications

JF - IEEE Transactions on Communications

IS - 234

ER -

Effects of Laser Direct Intensity Modulation Index on Optical Beat Interference in Subcarrier Multiplexed Wavelength Division Multiple Access Networks

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