All-Optical Processing, Still a Chance with DP-DQPSK

• Type: Article in International Conference Proceedings Book
• Date: 2009

Authors

Rui Morais (Author) Other; Paulo Monteiro (Author) Other; Paulo Marques (Author) FCUP

Conference proceedings International

Title: ICTON: 2009 11TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS, VOLS 1 AND 2

Pages: 40-40

11th International Conference on Transparent Optical Networks

S Miguel, PORTUGAL, JUN 28-JUL 02, 2009

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ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Scientific classification

FOS: Natural sciences > Computer and information sciences

Other information

Authenticus ID: P-003-QD7

DOI: 10.1109/icton.2009.5184980

Abstract (EN): In this work we present a possible "way-to-go" for all-optical processing, shortening the distance between typical all-optical scenarios and real standardized optical networks. This is based on the usage of dualpolarization quadrature phase-shift keying (DP-DQPSK) for transmission with subsequent conversion to amplitude shift-keying for optical processing in metro/access network scenarios. In the last years, a strong push towards 100 Gbit/s technology developments has been done by major operators. The achieved developments indicate that future for high bit rate transmission in long-haul networks is reserved for phase modulation formats (like DP-QPSK) with coherent detection and subsequent electronic processing to mitigate transmission impairments. As this is becoming obvious for long-haul networks where high performance in transmission is required, the same is not applied to metropolitan networks. First of all the push for 100Gbit/s in metro hasn't been as strong as in long-haul (but it will come soon) and second, metro networks are much more cost sensitive and need less transmission performance, therefore the price of coherent detection and electronic processing might be difficult to realize when 100 Gbit/s come to the metro region. It can, therefore, be expected that amplitude modulation (AM) formats will still domain the metro area. Typical all-optical processing use AM signals which means that for metro networks there may still be a role for it. Recently, a transparent node connecting regio/metro to metro/access network rings was successfully demonstrated [1], [2]. There, full mux/demux between optical time domain multiplexed (OTDM) signals in regio/metro ring and wavelength division multiplexed (WDM) signals in metro/access was shown using AM signals. This experiment showed the potential of all-optical processing in terms of performance, cost and power savings. All-optical conversion between phase modulated (PM) and AM signals was demonstrated both with semiconductor optical amplifiers (SOAs) [3] and highly nonlinear fibres (HNLF) [4]. This means that, in principle, it is possible to merge the best of the two worlds; tight spectral occupation from long-haul DP- (D)QPSK and all-optical processing from AM signals in metro region. This might be the "way-to-go" for all optical processing. © 2009 IEEE.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 1