Patent · US Active

Dispersion compensation circuitry and system for analog video transmission with direct modulated laser

US7945172B2 · kind B2 · utility

5Cited by

37References

18Claims

0Family size

Assignee

Harmonic, Inc. · US

Inventors

Wei-Jen Huang · Burlingame, US
Thomas C. Lam · San Jose, US
Li-Ping Chen · Taipei, TW

Key dates

Filing date	May 20, 2008
Grant date	May 17, 2011
Priority date	—
Expiry date	Nov 5, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04B10/25133
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

An improved precompensation circuit includes a greatly improved differentiator in the dispersion precompensation path, a preprocessor in the dispersion precompensation path for reducing f2−f1 type Composite Second Order (CSO) distortion, and a broadband phase shifter for compensating undesired vector interaction between the laser predistortion and dispersion compensation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.