Title :
Spatially resolved detection and equalization of modal dispersion limited multimode fiber links
Author :
Patel, Ketan M. ; Polley, Arup ; Balemarthy, Kasyapa ; Ralph, Stephen E.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
fDate :
7/1/2006 12:00:00 AM
Abstract :
The authors present theoretical and experimental results of an optoelectronic-equalization technique that mitigates intersymbol interference caused by differential modal delay in multimode fiber. By exploiting the spatial diversity of the transverse optical-fiber modes, the authors are able to provide a sufficient additional information in the form of mode-dependent photocurrents to enhance total signal integrity. A fabricated two-segment photodetector is demonstrated with a routinely achievable two-times improvement in bandwidth-distance product. They also show the robustness of the technique to the expected variations in graded-index profiles.
Keywords :
delays; equalisers; gradient index optics; intersymbol interference; optical communication equipment; optical fibre communication; optical fibre dispersion; photoconductivity; photodetectors; telecommunication channels; differential mode delay; equalization; graded-index profiles; intersymbol interference; modal dispersion limited fiber links; mode-dependent photocurrents; multimode fiber links; optical channel equalization; optoelectronic equalization; spatially resolved detection; total signal integrity; transverse optical-fiber modes; two-segment photodetector; Delay; Intersymbol interference; Optical devices; Optical feedback; Optical fiber networks; Optical receivers; Optical transmitters; Photoconductivity; Photodetectors; Spatial resolution; Optical-fiber dispersion; optical receivers; optical-signal processing; optoelectronic devices;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2006.875239
