US Patent 7638351 Photodiode with fiber mode dispersion compensation

Patent 7638351 was granted and assigned to Finisar on December, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Finisar

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

76383510

Patent Inventor Names

Jimmy A. Tatum0

Date of Patent

December 29, 2009

Patent Application Number

111850380

Date Filed

July 20, 2005

Patent Primary Examiner

‌

Kiesha L. Rose

Patent abstract

A photodiode and a method of fabricating a photodiode for reducing modal dispersion and increasing travel distance. The central region of the photodiode is made less responsive to incident light than a peripheral region of the photodiode. The less responsive central region discriminates the lower order modes such that only the higher order modes are incident on the more responsive peripheral region. Because the lower order modes are subtracted, the range of propagation constants is reduced and modal dispersion is also reduced.