Company Filing History:
5 out of 7 
2 out of 5,290 
Years Active: 1990-1998
Title: Innovations of Shin Sumida
Introduction
Shin Sumida is a notable inventor based in Columbus, OH (US). He has made significant contributions to the field of optical technology, holding a total of 7 patents. His work focuses on enhancing the efficiency and functionality of optical circuits and components.
Latest Patents
One of his latest inventions is the "Multi-mode optical T-splitter and method of fabricating same." This invention comprises a multi-mode optical 'T'-splitter designed for the coupling of multi-mode optical fibers to, from, and between other fibers, sources, detectors, and other optical elements. The optical T-splitters utilize tubular waveguides to achieve a better match with round fibers, resulting in higher efficiency and lower loss. The design features waveguides forming a substantially T-shaped geometry in a substrate, with a reflecting element inserted at the junction to split input light. This configuration allows for various optical functions, including splitting, tapping, mixing, and coupling, while being relatively easy to manufacture and inexpensive.
Another significant invention is the "Multi-mode optical circuit to couple light between various optical fibers." This optical circuit also focuses on the coupling of multi-mode optical fibers and employs round waveguides for improved efficiency. The design involves a substrate with semi-circular grooves that, when aligned and adhered together, create tubular channels. This innovation allows for multiple optical functions and is characterized by low propagation and coupling loss.
Career Highlights
Shin Sumida has worked with several prominent companies, including Photonic Integration Research, Inc. and Nippon Telegraph and Telephone Corporation. His experience in these organizations has contributed to his expertise in optical technologies and innovations.
Collaborations
Some of his notable coworkers include Tadashi Miyashita and Masao Kawachi. Their collaboration has likely played a role in advancing the field of optical technology.
Conclusion
Shin Sumida's contributions to optical technology through his patents and collaborations highlight his innovative spirit and dedication to improving optical systems. His work continues to influence the industry and pave the way for future advancements.