Verizon Tests Live PMD Measurement

Verizon, EXFO and General Photonics mark first PMD measurement on traffic-bearing network

March 9, 2011

1 Min Read

LOS ANGELES -- Verizon, EXFO, and General Photonics have successfully measured polarization mode dispersion (PMD) on a traffic-bearing long haul network without impacting neighboring channels carrying live traffic. PMD is measured to determine system impairments for 40G and 100G signal transmissions.

In field trials performed on the Verizon network, two novel methods were used to measure PMD. One method used General Photonics' PMDPro PMD-1000 and SmartLight TCA-1000 solutions and was based on light-path PMD compensation. The other method used EXFO prototype equipment that employed algorithms in the company's FTB-5700 Dispersion Analyzer and was based on statistical analysis of randomly polarized test signals. Both methods were performed on idle channels of a traffic-bearing long-haul network. When compared with the expected PMD value of the route, measurements showed a high level of accuracy with no adverse impact on the working channels, demonstrating both methods are suitable for measuring PMD on traffic-bearing systems.

Details of the field trial will be provided during OFC/NFOEC 2011 at the Los Angeles Convention Center, March 9, 2011 at 2:00 PM in session NWC4, by Dr. T.J. Xia, Distinguished Member of Technical Staff at Verizon.

"Advancing technology in PMD measurement -- a key component of fiber quality -- is an important step toward improving network performance," said Glenn Wellbrock, director of optical transport network architecture for Verizon. "Successfully proving we can measure PMD of an end-to-end light path in a meshed network such as Verizon's, with no impact on the performance of live channels is a significant advancement in measurement technology."

Verizon Communications Inc. (NYSE: VZ)

EXFO (Nasdaq: EXFO; Toronto: EXF)

General Photonics Corp.

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