David R Walker

Title: The Innovations of David R Walker

Introduction

David R Walker is a notable inventor based in Ottawa, Canada. He has made significant contributions to the field of optical technology, holding a total of six patents. His work primarily focuses on tunable optical filters, which play a crucial role in modern communication systems.

Latest Patents

One of Walker's latest patents is a flat-top tunable filter. This invention describes a tunable PLC optical filter that utilizes sequentially connected thermally tunable Mach-Zehnder (MZ) interferometers. The cascade of MZ interferometers is designed to match the ITU frequency grid spacing, allowing for precise tuning to select specific signal frequencies while suppressing unwanted optical channels. Another significant patent involves characterizing a frequency channel in an optical network. This tunable optical filter is capable of taking point measurements at various optical frequencies within a DWDM optical network. By utilizing a known spectral shape, it can determine the center optical frequency, modulation bandwidth, and total optical power from just a few measurements.

Career Highlights

Throughout his career, David R Walker has worked with prominent companies such as Lumonics Inc. and Nortel Networks Corporation. His experience in these organizations has contributed to his expertise in optical technologies and innovations.

Collaborations

Walker has collaborated with notable individuals in his field, including Barthelemy Fondeur and Jinxi Shen. These partnerships have likely enhanced his research and development efforts, leading to his successful patent applications.

Conclusion

David R Walker's contributions to optical technology through his patents and collaborations highlight his innovative spirit and expertise in the field. His work continues to influence advancements in communication systems.