This inventor holds 2 USPTO granted patents. Top assignee: Bookham Technology Limited. Active years: 2006-2007.
Location History:
- Northants, GB (2006)
- Towcester, GB (2007)
Company Filing History:
Years Active: 2006-2007
Title: Innovations of Robert Ian Johnstone
Introduction
Robert Ian Johnstone is a notable inventor based in Towcester, GB. He has made significant contributions to the field of photonics, holding a total of 2 patents. His work focuses on improving optical devices and methods, showcasing his expertise and innovative spirit.
Latest Patents
One of Johnstone's latest patents is for a method of fabricating polarization rotators. This improved method involves etching a pit in the substrate surface to create a recess in one of the side walls of a rib waveguide. This design allows for an asymmetric waveguide section that imparts polarization rotation to radiation propagated along the waveguide's propagation axis. The method simplifies production compared to prior art, enhancing yield and predictability in device performance.
Another significant patent is for a photonic integrated device. This device features a substrate layer with epitaxial layers and a guiding layer that contains an optical waveguide. Within this waveguide, a splitter directs outputs to Mach-Zehnder modulators, allowing for phase shifts in the signals. A trench is etched into the substrate layer to isolate the modulators, ensuring optimal performance.
Career Highlights
Johnstone is currently associated with Bookham Technology Limited, a company known for its advancements in photonic technology. His work at the company has contributed to the development of innovative optical devices that push the boundaries of current technology.
Collaborations
Johnstone has collaborated with notable coworkers, including Robert Anthony Griffin and Robert Graham Walker. These collaborations have likely fostered a creative environment that encourages innovation and the sharing of ideas.
Conclusion
Robert Ian Johnstone's contributions to the field of photonics through his patents and work at Bookham Technology Limited highlight his role as a significant inventor. His innovative methods and devices continue to influence the industry, showcasing the importance of creativity in technological advancement.