Patent assignee · US · COMPANY

Opnext Subsystems, Inc.

16Patents
16Active
16Granted
49Portfolio score

Filing activity: Mar 14, 2007 → May 14, 2012 · 8 expiring within 5 years

Most-cited patents

PatentTitleAreaCited byStatus
US8565621B2 Quadrature time skew detection for coherent optical signals Electricity 37 Active
US7986878B2 Adjustable bit rate optical transmission using programmable signal modulation Electricity 33 Active
US8244142B2 Optical receiver having fractional sampling Electricity 29 Active
US8634726B2 Polarization and differential-group-delay insensitive digital timing error detection for polarization-multiplexed coherent optical systems Electricity 23 Active
US8032025B2 Polarization monitoring in polarization division multiplexing in optical communications Electricity 12 Active
US8428183B2 In-phase and quadrature pattern alignment for quadrature phase shift keying optical transmitters Electricity 8 Active
US8532504B2 Coherent optical receiver with adaptive equalizer initialization system Electricity 7 Active
US8644420B2 Alignment of in-phase and quadrature data in quadrature phase shift keying optical transmitters Electricity 7 Active
US7991300B2 Optical receiver having bandwidth control for intersymbol interference compensation Electricity 6 Active
US8768178B2 Automatic gain control for high-speed coherent optical receivers Electricity 6 Active
US8023833B2 Optical receivers with controllable transfer function bandwidth and gain imbalance Electricity 4 Active
US7970289B2 GT decoder having bandwidth control for ISI compensation Electricity 1 Active
US8126337B2 Balanced phase-shaped binary transmission in optical communications Electricity 1 Active
US8565271B2 Multiplexer lane alignment for high-speed data systems Electricity 0 Active
US7983573B2 Optical receiver having FSR phase compensation Electricity 0 Active
US8437632B2 Polarization monitoring in polarization division multiplexing in optical communications Electricity 0 Active

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.