Spread spectrum fiber-optic local area network using optical processing

Performance Analysis of Two Dimensional Wavelength/ Time Encoding System for Optical CDMA Networks

“…Therefore, unipolar codes with good system performance need to be developed. Consequently, in the earlier years, the research on incoherent OCDMA focused on looking for and obtaining unipolar codes with good auto-and cross-correlations, such as OOC (Optical Orthogonal/Pseudo-Orthogonal Codes) [1], [8], PC (Prime Codes), QCC (Quadratic Congruence Codes) [9] etc. In order to improve the performances of PC and QCC, EPC (Extended Prime Codes) [10], MPC (Modified Prime Codes) [11] and EQCC (Extended Quadratic Congruence Codes) [12] have been proposed again.…”

“…Optical CDMA (OCDMA) has for a long time been the subject of research due to its inherent ability to support asynchronous burst communications. Initially OCDMA was employed for local area [1], then for access network applications [2], [3] and currently for emerging optical networks such as generalized multiprotocol label switching, fiber-to-home (FTTH) or fiber-to-the-curb (FTTC) [4]- [6].…”

Optimized Designing of Optical Local Area Network With Optical Code Division Multiple Access Incorporating Forward Error Correction

“…Emerging of wireless CDMA telephony in the 1980swith tremendous benefits of CDMA such as a merit of Spread Spectrum (SS) pushes some researchers to transfer principles and advantages of CDMA into optical communication networks [1,2,3].The first experiment that demonstrates the feasibility of implementing CDMA thought into the optical domain was in 1986 by [4]. Then Salehi employed CDMA techniques in optical systems and analyzed their performances [5,6].Up till now, interest in applications of OCDMA has been constantly rising during recent decades [7].The nature of OCDMA in security has been concerned for some application of enterprise and military networks.…”

Feasibility Study of SOA-Based Noise Suppression for Spectral Amplitude Coded OCDMA

“…O PTICAL code division multiple access (OCDMA) has been proposed as a potential solution to address the bandwidth and flexibility demands of local area and access networks [1]. OCDMA allows statistical multiplexing [2] and asynchronous operation, while giving service providers the ability to offer service differentiation [3], highly desirable for last-mile end-user markets.…”

“…OCDMA allows statistical multiplexing [2] and asynchronous operation, while giving service providers the ability to offer service differentiation [3], highly desirable for last-mile end-user markets. While numerous implementations of OCDMA have been investigated [1]- [6], spectral-amplitude-coded (SAC) techniques using inexpensive broadband sources are well suited for the cost-sensitive access environment [6].…”