Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 8, 2013
|
|
---|---|---|
Article Number | 13013 | |
Number of page(s) | 6 | |
DOI | https://doi.org/10.2971/jeos.2013.13013 | |
Published online | 09 February 2013 |
Regular papers
Towards self-clocked gated OCDMA receiver
Department of Electrical and Electronic Engineering, University of Strathclyde, Royal College Building, 204 George Street, Glasgow G1 1XW, United Kingdom
* Siti.idris-othman@strath.ac.uk
Received:
8
November
2012
Revised:
11
January
2013
A novel incoherent OCDMA receiver with incorporated all-optical clock recovery for self-synchronization of a time gate for the multi access interferences (MAI) suppression and minimizing the effect of data time jitter in incoherent OCDMA system was successfully developed and demonstrated. The solution was implemented and tested in a multiuser environment in an out of the laboratory OCDMA testbed with two-dimensional wavelength-hopping time-spreading coding scheme and OC-48 (2.5 Gbp/s) data rate. The self-clocked all-optical time gate uses SOA-based fibre ring laser optical clock, recovered all-optically from the received OCDMA traffic to control its switching window for cleaning the autocorrelation peak from the surrounding MAI. A wider eye opening was achieved when the all-optically recovered clock from received data was used for synchronization if compared to a static approach with the RF clock being generated by a RF synthesizer. Clean eye diagram was also achieved when recovered clock is used to drive time gating.
Key words: All-optical clock recovery (AOCR) / incoherent optical code division multiple access (OCDMA) / SOA-based MZI all-optical time gate / two-dimensional wavelength-hopping time-spreading code / self-clocking
© The Author(s) 2013. All rights reserved.
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