Journal ArticleDOI
Effect of laser diode characteristics on the performance of an SCM–OFDM direct detection system
L. Chao
- Vol. 140, Iss: 6, pp 392-396
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TLDR
In this paper, the application of the microwave subcarrier multiplexing technique (SCM) in an OFDM system which employs an optical FM direct detection scheme was described, and the effect of laser diode phase noise and relative intensity noise as well as the intermodulation product of sub-carrier channels was analyzed and the results presented.Abstract:
This paper describes the application of the microwave subcarrier multiplexing technique (SCM) in an optical frequency division multiplexing (OFDM) system which employs an optical FM direct detection scheme. Direct frequency modulation of a laser diode offers the advantages of compact optical spectrum and simple driving circuit; it also permits a more effective utilisation of optical channel capacity. The carrier-to-noise ratio performance of each subcarrier channel is evaluated. The effect of laser diode phase noise and relative intensity noise as well as the intermodulation product of subcarrier channels on the overall system performance is analysed and the results presented.read more
Citations
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Journal ArticleDOI
Performance improvement of hybrid subcarrier multiplexing optical spectrum code division multiplexing system using spectral direct decoding detection technique
TL;DR: A newly developed detection technique for the OSCDM called spectral direct decoding (SDD) detection technique is compared mathematically with the AND subtraction detection technique to show that SDD offers a significant improved performance at BER of 10−9.
Journal Article
Variable-weight optical code division multiple access system using different detection schemes
TL;DR: It has been shown that for different bit rates and number of users, system using DD has better performance than the system applying CS and AND detection.
Journal ArticleDOI
A new model to enhance the QoS of spectral amplitude coding-optical code division multiple access system with OFDM technique
TL;DR: The proposed new optical orthogonal frequency division multiplexing technique with spectrum amplitude coding optical code division access (SAC-OCDMA) system is designed based on modified double weight code, which provides better performance than Hadamard and modified frequency-hopping codes.
Journal ArticleDOI
Development of OCDMA system based on Flexible Cross Correlation (FCC) code with OFDM modulation
TL;DR: The proposed OCDMA–FCC_OFDM system gave better performance and save around −6 dBm of the power as well as increase the number of users twice compare to SCM/OCDMA system, and is robust against interference and much more spectrally efficient than SCM-ODCMA-FCC system.
Journal ArticleDOI
Performance of Hybrid Subcarrier Multiplexing Over Optical CDMA Network Based on Zero Cross Correlation Code
Junita Mohd Nordin,Syed Alwee Aljunid,Anuar Mat Safar,Amir Razif Arief Jamil Abdullah,Rosemizi Abd Rahim +4 more
TL;DR: This paper demonstrates the transmission performance of a hybrid subcarrier multiplexing over optical CDMA for a point-to-point network design and compared the hybrid system with a purely all-optical system utilizing the same code.
References
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Laser Diode Modulation and Noise
TL;DR: In this paper, the authors present the spectral properties of Fabry-Perot-type laser diodes with respect to light current, threshold current, and quantum efficiency, as well as the effect of nonlinear gain on spectral properties.
Journal ArticleDOI
Subcarrier multiplexing for lightwave networks and video distribution systems
TL;DR: Applications for subcarrier multiplexing include a variety of analog and digital lightwave transmission systems that include multiuser interactive local area networks and multichannel digital, FM, and AM-VSB (vestigal sideband) video distribution systems.
Journal ArticleDOI
Subcarrier multiplexed lightwave system design considerations for subscriber loop applications
TL;DR: In this paper, the two most important system design considerations in an SCM system are the control of intensity noise and nonlinear distortions, and various system applications for SCM systems are examined.
Journal ArticleDOI
Multichannel coherent FSK experiments using subcarrier multiplexing techniques
R. Gross,R. Olshansky +1 more
TL;DR: In this paper, the results for coherent digital subcarrier multiplexed (SCM) lightwave system experiments are described, including carrier-to-noise ratio, crosstalk, intermodulation distortion, and receiver sensitivity.
Journal ArticleDOI
ASK and FSK coherent lightwave systems: a simplified approximate analysis
Leonid G. Kazovsky,O.K. Tonguz +1 more
TL;DR: In this article, a simplified approximate analysis of amplitude shift keying (ASK) and frequency-shift keying coherent optical communication systems is presented, which accounts for the phase noise of the transmitter and the local oscillator lasers and for additive Gaussian noise stemming from the shot noise and thermal noise.
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