Optical signal regeneration at different modulation formats

Bernhard Schmauss; Arne G. Striegler; Markus Meissner

doi:10.1117/12.580086

25 October 2004 Optical signal regeneration at different modulation formats

Bernhard Schmauss, Arne G. Striegler, Markus Meissner

Proceedings Volume 5596, Optical Transmission Systems and Equipment for WDM Networking III; (2004) https://doi.org/10.1117/12.580086
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

Abstract

Optical transmission systems made impressive progress in the field of system capacity, reach and flexibility. Beside all improvements achieved so far, signal distortion on the one hand side and noise accumulation on the other hand side are the limitations of optical transmission systems. In terms of signal distortion besides advanced link design strategies optical regenerators are of high interest for signal conditioning along a fiber link. Furthermore the upcoming techniques of advanced modulation formats build a basis for further improvement of transmission quality that ends up with even higher reach, higher robustness against transmission impairments, lower signal to noise requirements etc. In this talk the current status of research in the field of optical signal regenerators suitable for signal regeneration for different modulation formats will be reviewed and presented, where we restrict our analysis to 2R regenerators. The focus will be put on regenerators taking advantage of non linear optical effects in order to improve signal quality. The main challenge is the treatment of phase modulated signals within regenerators. Especially the differential phase shift keying (DPSK) modulation format or the duobinary modulation format are attractive candidates for such kind of regenerators for further improvement of DPSK based transmission systems. The paper will go through several regenerative concepts like non linear optical loop mirror (NOLM) based and cross phase modulation based regenerators in order to figure out their potential for advanced modulation format based systems.

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Bernhard Schmauss, Arne G. Striegler, and Markus Meissner "Optical signal regeneration at different modulation formats", Proc. SPIE 5596, Optical Transmission Systems and Equipment for WDM Networking III, (25 October 2004); https://doi.org/10.1117/12.580086

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KEYWORDS

Modulation

Scanning probe microscopy

Signal detection

Eye

Distortion

Phase shifts

Clocks

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