Inventor

WELCH DAVID F

US170 patents

⚠️ This page may combine multiple inventors who share the name “WELCH DAVID F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

WELCH DAVID F

SDL INC

High power fiber gain media system achieved through power scaling via multiplexing

High power laser optical amplifier system

Methods for forming group III-V arsenide-nitride semiconductor materials

Fiber amplifiers and pumping sources for fiber amplifiers

Optical amplifiers providing high peak powers with high energy levels

III-V aresenide-nitride semiconductor materials and devices

Wavelength-stabilized, high power semiconductor laser

Double-clad upconversion fiber laser

Semiconductor laser with integral spatial mode filter

High power marking system achieved through power scaling via multiplexing

Semiconductor laser highpower amplifier system

High power, reliable optical fiber pumping system with high redundancy for use in lightwave communication systems

Double-clad optical fiber with improved inner cladding geometry

Optical amplifier with high energy levels systems providing high peak powers

High power, reliable optical fiber pumping system with high redundancy for use in lightwave communication systems

Upconversion fiber laser

Differentially pumped optical amplifer and mopa device

Wavelength-stabilized, high power semiconductor laser

Frequency converted laser diode and lens system therefor

NxN Optical crossbar switch matrix

Tunable blue laser diode

Tunable blue laser diode

Semiconductor laser with broad-area intra-cavity angled grating

Multiple emitter semiconductor laser pump source for scaling of pump power and generation of unpolarized light for light signal amplification

INFINERA CORP

Transmitter photonic integrated circuit (TxPIC) chips

Transmitter photonic integrated circuits (TxPIC) and optical transport networks employing TxPICs

Transmitter photonic integrated circuit (TxPIC) chip architectures and drive systems and wavelength stabilization for TxPICs

Monolithic transmitter photonic integrated circuit (TxPIC) having tunable modulated sources with feedback system for source power level or wavelength tuning

Forward error correction (FEC) enabled photonic integrated circuit (PICs) chips with multiple signal channels

Coolerless photonic integrated circuits (PICs) for WDM transmission networks and PICs operable with a floating signal channel grid changing with temperature but with fixed channel spacing in the floating grid

Monolithic transmitter/receiver photonic integrated circuit (Tx/RxPIC) transceiver chip

Digital optical network architecture

Optical transmission network with a receiver photonic integrated circuit (RxPIC) utilizing an optical service chanel (OSC)

Monolithic photonic integrated circuit (PIC) CHIP

Method of optimizing optical channel signal demultiplexing in a monolithic receiver photonic integrated circuit (RxPIC)

Optical transmission network with transmitter photonic integrated circuit (TxPIC) utilizing an optical service channel (OSC)

Method and apparatus of monitoring and controlling the emission wavelengths of a plurality of laser sources integrated on the same chip or in the same photonic integrated circuit (PIC)

Optical signal receiver, an associated photonic integrated circuit (RxPIC), and method improving performance

FEC enhanced system for an optical communication network

Optical transmitter

Method of tuning integrated laser sources with integrated wavelength tuning elements on the same substrate or in a monolithic photonic integrated circuit (PIC)

Method and apparatus of monitoring and controlling the emission wavelengths of a plurality of laser sources integrated on the same chip or in the same photonic integrated circuit (PIC)

Optical probe and method of testing employing an interrogation beam or optical pickup

Optical transport network

Optical receiver photonic integrated circuit (RxPIC) system

WU KUANG-TSAN

Wavelength division multiplexed optical communication system having variable channel spacings

Wavelength division multiplexed optical communication system architectures

JDS UNIPHASE CORP

Semiconductor laser high power amplifier system for materials processing

Raman-based utility optical amplifier

WELCH DAVID F

Transmitter photonic integrated circuit (TxPIC) chip