Design and Performance Analysis of a newly
designed 32-User Spectral Phase Encoding
system operating at 2.5Gb/s for Fiber-Optic
CDMA Networks
Savita R.Bhosale* Mr. S.B.Deosarkar*** Dr. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY, LONERE, TAL. - MANGAON, DIST. RAIGAD, PIN – 402103
Correspondence should be address to sr4bhosale@gmail.com and svt4bhosale@rediffmail.com

Abstract— Multiple access techniques are required to meet the demand for high-speed and large-capacity communications in opticalnetworks, which allow multiple users to share the fiber bandwidth. Optical code-division multiple-access (O-CDMA) is receiving
increased attention due to its potential applications for broadband access networks. We analyze a new technique for encoding anddecoding of coherent ultra short light pulses. In particular, we discuss the temporal pseudo noise bursts generated by spectral phase
coding of ultra short optical pulses. This paper describes a performance analysis of Spectral Phase Encoding optical code-divisionmultiple-access scheme based on wavelength/time (W/T) codes and random phase codes. We have studied the optical simulator
Encoding/Decoding at different fiber lengths & gain in terms of Quality factor (Q) and Bit Error Rate (BER) performance. We derive thebit error rate (BER) and QoS as a function of data rate, number of users, receiver threshold. We find that performance improves
dramatically with optical power normalizer.Ultrashort light pulse CDMA could provide tens to hundreds of users with asynchronously
multiplexed, random access to a common optical channel. The system supports 32 users while maintaining bit-error rate (BER) < 10−9 andrequired QoS for the correctly decoded signal at 2.5 Gbits/s bit rate.
Keyword— BER, ISD, MAI, NRZ, OCDMA, OOC, PSO, QoS, RZ
Savita R.Bhosale Research Scholar Dr.Babasaheb Ambedkar Technological University Lonere (MS) ,India.Savita R.Bhosale received theB.E. degree in electronics and Telecommunication engineering from Dr.Babasaheb Ambedkar Maratwada University, India in 1993, andfinished the M.Tech. degree course in electronics and Telecommunication Engineering from Dr.Babasaheb Ambedkar TechnologicalUniversity Lonere (MS), India in 2006. Since 1998, She was worked as Lecturer and from 2006 working as Assistant Professor till date inMGM’s college of Engineering and Technology, India. Her research interests include Telecommunication and, optical fiber communication,optical networking, wireless and mobile communication.

Shankar B. Deosarkar Shankar B. Deosarkar Received his graduate degree in electronics engineering in the year 1988 from Amravati
University, his M.Tech and Doctorate degree in the area of Microwave Communication in the year 1990 and 2004 respectively fromS.G.G.S. Institute of Engineering and Technology, Nanded. At present he is guiding three Research Scholars in the area of EMI / EMC andMicrostrip Antenna Design. Presented his research contribution at IEEE International Conferences at IIT’S, USA, UK, CANADA, ITALYand SINGAPOORE.He had delivered invited talks at McGill University, Montreal, Canada, Electromagnetic Research Center Ottawa,Government of Canada and Princeton University, New Jersey, USA and UGC / AICTE refresher courses. He is also been member of theprogramme committee at the various international conferences and reviewer of few books of McGraw Hill and PHI publications in the areaof Microwave Communication as well reviewer of several national and international IEEE Conferences in the area of Microwave
Communication,optical fiber communication.