Signatures reconfigurations over waveguide-gratings-based optical CDMA network codecs

Jen Fa Huang, Sheng Hui Meng, Ying Chen Lin, An Chi Huang

Research output: Chapter in Book/Report/Conference proceedingConference contribution


To combat with multiple-users interference and malicious eavesdropping, this talk presents a double signatures scrambling scheme over wavelength/time for a cryptographic optical code-division multiple-Access (OCDMA) network data transmissions. Optical switches and fiber delay lines are placed with arrayed-waveguide grating (AWG) coder/decoders (codecs) to realize wavelength-spreading and time-hopping. On the transmitter side, user data bits are sliced into spectral chips, coded into pseudo-noise (PN) signature codes, and conducted with different PN-code units of time-delay. In the receiver side, complementary delay lines first reverse the summed spectral chips back into the same time basis, then optical switches follow the associated signatures to turn on-off spectral chips into balanced detector for the final data decoding. By changing signature codes frequently, the eavesdroppers cannot catch on the changing code speed and have little chance to detect the channel waveform to solve the code. With such wavelength/time scrambling scheme, data transmission reliability in OCDMA network can be greatly enhanced.

Original languageEnglish
Title of host publicationProceedings of ICP 2014 - 5th International Conference on Photonics 2014
EditorsHairul Azhar Abdul-Rashid, Mohd Adzir Mahdi, Zulfadzli Yusoff, Ahmad Fauzi Abas, Fairuz Abdullah, Siti Barirah Ahmad Anas, Ahmad Ashrif A. Bakar, Md Zaini Jamaludin, Mohd Hanif Yaacob, Mohd Saiful Dzulkefty Zan, Aiman Ismail, Nurul Asyikin Mohamed Radzi, Sevia Mahdaliza Idrus, Raja Zahilah Raja Mohd Radzi, Nor Iza Mohd Rawi, Norhana Arsad, Ahmad Shukri Muhammad Noor, Makhfudzah Mokhtar
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)9781479948833
Publication statusPublished - 2015 Jan 6
Event5th International Conference on Photonics, ICP 2014 - Kuala Lumpur, Malaysia
Duration: 2014 Sep 22014 Sep 4

Publication series

NameProceedings of ICP 2014 - 5th International Conference on Photonics 2014


Other5th International Conference on Photonics, ICP 2014
CityKuala Lumpur

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


Dive into the research topics of 'Signatures reconfigurations over waveguide-gratings-based optical CDMA network codecs'. Together they form a unique fingerprint.

Cite this