Results 71 to 80 of about 20,276,485 (162)

Distributed-phase OCDMA encoder-decoders based on fiber Bragg gratings

, 2007
We propose and demonstrate new optical code-division multiple-access (OCDMA) encoder-decoders having a continuous phase-distribution. With the same spatial refractive index distribution as the reconfigurable optical phase encoder-decoders, they are ...
Ibsen, M., Tian, C., Petropoulos, P., Richardson, D.J., Zhang, Zhaowei   +4 more
core   +1 more source

A grating-based OCDMA coding:decoding system incorporating a nonlinear optical loop mirror for improved code recognition and noise reduction

, 2002
We demonstrate an elementary grating-based optical code division multiple access (OCDMA) code generation and recognition system incorporating a nonlinear optical loop mirror (NOLM) within the receiver.
Teh, P.C., Ibsen, M., Petropoulos, P., Richardson, D.J., Lee, J.H.   +4 more
core   +1 more source

Simulation realization of 2-D wavelength/time system utilizing MDW code for OCDMA system

EPJ Web of Conferences, 2017
This paper presents a realization of Wavelength/Time (W/T) Two-Dimensional Modified Double Weight (2-D MDW) code for Optical Code Division Multiple Access (OCDMA) system based on Spectral Amplitude Coding (SAC) approach.
Azura M. S. A., Rashidi C. B. M., Aljunid S. A., Endut R., Ali N.   +4 more
doaj   +1 more source

A New Construction of Optimal Optical Orthogonal Codes From Sidon Sets

IEEE Access, 2020
Two new constructions for families of optical orthogonal codes are presented. The first is a generalization of the well-known construction of Sidon sets given by I. Z. Ruzsa.
Hamilton M. Ruiz, Luis M. Delgado, Carlos A. Trujillo   +2 more
doaj   +1 more source

Cardinality enrichment of 3-D FCC-MDW code in wavelength/time/space domains for non-coherent OCDMA at 17 Gbps with interference suppression En/Decoder

Results in Optics
This paper introduces a new Interference Suppression Scheme (ISS) for wavelength/time/spatial Optical Code Division Multiple Access (OCDMA) systems, demonstrated through a new 3-D FCC-MDW coding architecture. The 3-D FCC-MDW code offers flexible in-phase
A.J. Rupok, C.B.M. Rashidi, K.N.F.Ku Azir, B. Nakarmi, Mohammad Nayeem Morshed   +4 more
doaj   +1 more source

Rapidly reconfigurable optical phase encoder-decoders based on fiber Bragg gratings [PDF]

, 2006
We demonstrate the capacity for fast dynamic reconfiguration of optical code-division multiple access (OCDMA) phase en/decoders based on fiber Bragg gratings and a thermal phase-tuning technique.
Mokhtar, M.R., Ibsen, M., Tian, C., Petropoulos, P., Richardson, D.J., Zhang, Z.   +5 more
core   +1 more source

Advancing High-Speed Transmissions over OCDMA Networks by Employing an Intelligently Structured Receiver for Noise Mitigation

Applied Sciences, 2018
We propose an intelligently structured receiver to achieve high-speed transmissions over optical code-division multiple access (OCDMA) networks. Employing spectral-amplitude coding (SAC) reduces multiuser interference (MUI) in OCDMA, but the network bit ...
Kai-Sheng Chen, Yi-Chang Chen, Long-Guang Liao   +2 more
doaj   +1 more source

Spectrum-sliced wavelength division multiplexed systems with optical preamplifiers [PDF]

, 2009
The effect of dispersion on a spectrum-sliced wavelength division multi-plexed system with an optical preamplifier receiver is investigated using a theoretical model based on the statistics to improve understanding of spectrum slicing in a realistic ...
Sun, Shaobo, Leeson, Mark S.
core   +1 more source

Interferometric noise in optical code division multiple access systems

, 2006
Interferometric noise (IN) (also referred to as beat noise) is one of the most detrimental noise sources in optical code division multiple access (OCDMA) systems dominating the effect of multiple access interference (MAI). General classification of IN is
Taher Bazan, Ivan Andonovic, Andonovic, I., Harle, D.A., Bazan, T.M.A., David Harle   +5 more
core   +4 more sources

Phase encoding and decoding of short pulses at 10Gb/s using superstructured fiber Bragg gratings [PDF]

, 2001
A 7-chip, 160-Gchip/s phase-shift keyed code is assigned to short pulses after reflection from a superstructured fiber Bragg grating. The code is then recognized by a second grating, which is nominally identical to the encoder grating.
Teh, P.C., Ibsen, M., Petropoulos, P., Richardson, D.J.   +3 more
core   +1 more source