This inventor holds 3 USPTO granted patents. Top assignees: The United States of America as Represented by the United States, Sandia Corporation. Active years: 1994-1997.
Company Filing History:
2 out of 3,975 
1 out of 1,769 
Years Active: 1994-1997
Title: David C Craft: Innovator in Digital Photoreceivers and Optical Devices
Introduction
David C Craft is a notable inventor based in Albuquerque, NM (US). He has made significant contributions to the field of digital photoreceivers and optical devices, holding a total of 3 patents. His work has paved the way for advancements in digital optical communications and related technologies.
Latest Patents
One of Craft's latest patents is for a CMOS-compatible InP/InGaAs digital photoreceiver. This innovative device is monolithically formed on an InP semiconductor substrate and includes a p-i-n photodetector made from multiple InP/InGaAs layers. The adjacent heterojunction bipolar transistor (HBT) amplifier is designed to convert detected photocurrent signals into amplified outputs, which can directly drive integrated circuits such as CMOS. This photoreceiver can establish short-range digital optical communication channels between integrated circuits, with applications in multi-chip modules (MCMs). Additionally, it can be used for longer-range digital communications through fiber optic coupling. Arrays of these digital photoreceivers can be formed on a common substrate, allowing for multiple channels of digital optical communication, each consuming less than about 20 mW of power.
Another significant patent involves interferometric ring lasers and optical devices. In this invention, two ring diode lasers are optically coupled to produce a tunable and stable output through a Y-junction output coupler. This design demonstrates a sharp peak in light output with an excellent side-mode-rejection ratio. The rings can be constructed from either passive or active waveguide material, and with additional rings, the device can function as a tunable optical multiplexer/demultiplexer.
Career Highlights
Throughout his career, David C Craft has worked with prominent organizations, including the United States of America as represented by the United States and Sandia Corporation. His contributions have significantly impacted the fields of photonics and optical communications.
Collaborations
Craft has collaborated with notable individuals such as John P Hohimer and Michael L Lovejoy. Their combined expertise has further advanced the innovations in the technologies they have worked on.
Conclusion
David C Craft is a distinguished inventor whose work in digital photoreceivers and optical devices has made a lasting impact on the field of optical communications. His innovative patents continue to influence advancements in technology and