Optical link characterization

Details Optical link characterization Optical link characterization

2008-09-19

2011-12-13

Pinkney, Dawayne (Department: 2873)

Optical communications

Diagnostic testing

Determination of communication parameter

C398S081000, C398S143000

Reexamination Certificate

active

08078053

ABSTRACT:
Various example embodiments are disclosed. According to one example embodiment, a method may include transmitting a semiconductor laser-generated optical signal from a first end of a multi-mode fiber (MMF) optical link to a second end of the link. The optical signal may have a reference bandwidth at the first end of the link. The method may further include converting the optical signal to an electrical signal. The method may further include analyzing the electrical signal with an electronic dispersion compensator to determine an effective modal bandwidth (EMBW) of the received optical signal. The method may further include analyzing the electrical signal with an electronic dispersion compensator to determine an intersymbol interference (ISI) penalty of the optical link. The method may further include comparing the EMBW and the ISI penalty to predetermined threshold values of a tolerable EMBW and a tolerable ISI penalty, respectively, to characterize the optical link as acceptable or unacceptable for use as a communications link with a predetermined communications protocol.

REFERENCES:
patent: 7715669 (2010-05-01), Cunningham et al.
patent: 2004/0247238 (2004-12-01), Argon et al.
IEEE, “Amendment: Media Access Control (MAC) Parameters, Physical Layers, and Management Parameters for 10 Gb/s Operation”, IEEE Computer Society, Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications, IEEE Std 802.3ae™-2002, IEEE Standard for Information technology Telecommunications and information exchange between systems Local and metropolitan area networks Specific requirements, Aug. 30, 2002, 529 pages.
Pondilli, Peter, et al., “Modal Dependence of Bandwidth”, CORNING, Optical Fiber, White Paper, WP4169, May 2001, pp. 1-4.

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