Opnext Profile

Opnext Patent Grants

Automatic gain control for high-speed coherent optical receivers

Patent Number 8768178 - July 1, 2014

Feed-forward and feedback strategies are used to control local oscillator power and transimpedance amplifier gain in a high-speed coherent…

Green laser system

Patent Number 8675698 - March 18, 2014

A green laser is made by constructing a laser cavity that includes within it a laser diode, a non-linear crystal such as KTP, and a lens. The…

Alignment of in-phase and quadrature data in quadrature phase shift keying optical transmitters

Patent Number 8644420 - February 4, 2014

I/Q data skew in a QPSK modulator may be detected by sending identical or complementary data streams to I and Q channel PSK modulators,…

Polarization and differential-group-delay insensitive digital timing error detection for polarization-multiplexed coherent optical systems

Patent Number 8634726 - January 21, 2014

Digital timing error detection systems and techniques are described. The described techniques are independent of polarization and…

Multiplexer lane alignment for high-speed data systems

Patent Number 8565271 - October 22, 2013

Patterns detected by a low-speed receiver at the output of a high-speed multiplexer are used to determine when multiplexer input lanes are…

Opnext Patent Applications

Optical Coherent Receiver Optimization

Application Number 20130170829 - July 4, 2013

Coherent optical receiver performance is optimized and made adaptable to changing optical channel conditions by providing feedback loops to…

Automatic Gain Control for High-Speed Coherent Optical Receivers

Application Number 20130071109 - March 21, 2013

Feed-forward and feedback strategies are used to control local oscillator power and transimpedance amplifier gain in a high-speed coherent…

OPTICAL SEMICONDUCTOR DEVICE, AND MANUFACTURING METHOD THEREOF

Application Number 20120321244 - December 20, 2012

The optical semiconductor device includes a spot-size converter formed on a semiconductor substrate. The spot-size converter has a multilayer…

OPTICAL DEVICE, MODULATOR MODULE, AND METHOD FOR MANUFACTURING THE OPTICAL DEVICE

Application Number 20120314725 - December 13, 2012

An optical device includes a ridge-like optical waveguide portion, a mesa protector portion that is arranged in parallel to the optical…

OPTICAL OUTPUT MODULE, OPTICAL TRANSCEIVER, AND OPTICAL TRANSMISSION SYSTEM

Application Number 20120301153 - November 29, 2012

The I phase modulator modulates a phase based on the bias voltage in which a first modulation signal and a first pilot signal are inherent and…

Opnext Federal Litigation Filings

Opnext Subsystems, Inc. v. UPS Air Freight Consolidated et al

New York Southern District Court - November 21, 2012

In Re: Opnext, Inc.

U.S. Court of Appeals, Third Circuit - June 30, 2009

JOHNSON v. OPNEXT, INC. et al

New Jersey District Court - March 20, 2008

COLEMAN v. OPNEXT, INC. et al

New Jersey District Court - March 7, 2008

BIXLER v. OPNEXT, INC. et al

New Jersey District Court - February 20, 2008