All-optical virtual private network system in OFDM based long-reach PON using RSOA re-modulation technique

Chang-Hun Kim; Sang-Min Jung; Su-Min Kang; Sang-Kook Han

doi:10.1117/12.2076249

7 February 2015 All-optical virtual private network system in OFDM based long-reach PON using RSOA re-modulation technique

Chang-Hun Kim, Sang-Min Jung, Su-Min Kang, Sang-Kook Han

Author Affiliations +

Proceedings Volume 9387, Broadband Access Communication Technologies IX; 93870F (2015) https://doi.org/10.1117/12.2076249
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

We propose an all-optical virtual private network (VPN) system in an orthogonal frequency division multiplexing (OFDM) based long reach PON (LR-PON). In the optical access network field, technologies based on fundamental upstream (U/S) and downstream (D/S) have been actively researched to accommodate explosion of data capacity. However, data transmission among the end users which is arisen from cloud computing, file-sharing and interactive game takes a large weight inside of internet traffic. Moreover, this traffic is predicted to increase more if Internet of Things (IoT) services are activated. In a conventional PON, VPN data is transmitted through ONU-OLT-ONU via U/S and D/S carriers. It leads to waste of bandwidth and energy due to O-E-O conversion in the OLT and round-trip propagation between OLT and remote node (RN). Also, it causes inevitable load to the OLT for electrical buffer, scheduling and routing. The network inefficiency becomes more critical in a LR-PON which has been researched as an effort to reduce CAPEX and OPEX through metro-access consolidation. In the proposed system, the VPN data is separated from conventional U/S and re-modulated on the D/S carrier by using RSOA in the ONUs to avoid bandwidth consumption of U/S and D/S unlike in previously reported system. Moreover, the transmitted VPN data is re-directed to the ONUs by wavelength selective reflector device in the RN without passing through the OLT. Experimental demonstration for the VPN communication system in an OFDM based LR-PON has been verified.

Citation Download Citation

Chang-Hun Kim, Sang-Min Jung, Su-Min Kang, and Sang-Kook Han "All-optical virtual private network system in OFDM based long-reach PON using RSOA re-modulation technique", Proc. SPIE 9387, Broadband Access Communication Technologies IX, 93870F (7 February 2015); https://doi.org/10.1117/12.2076249

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