Location History:
- Kanagawa, JP (1996 - 1998)
- Minami-ashigara, JP (1996 - 2000)
- Nakai-machi, JP (2000 - 2003)
Company Filing History:
Years Active: 1996-2003
Title: Innovations by Keiichi Nashimoto in Optical Technologies
Introduction
Keiichi Nashimoto, an esteemed inventor based in Minami-Ashigara, Japan, has made significant contributions to the field of optical technologies. With a remarkable portfolio of 21 patents, Nashimoto has been instrumental in advancing the efficiency and effectiveness of optical devices.
Latest Patents
Among his recent innovations are patents for an optical waveguide element, a manufacturing method for the optical waveguide element, an optical deflecting element, and an optical switching element. His optical waveguide element is designed to achieve high coupling efficiency with optical fibers. It incorporates a buffer layer over a monocrystalline substrate and an optical waveguide layer positioned within a recess in this buffer layer. This design enables the formation of a channel optical waveguide that significantly reduces coupling loss between the optical fiber and the optical waveguide element. Furthermore, by utilizing a cladding layer with a lower refractive index that increases in thickness towards the end faces, Nashimoto's invention effectively compresses the mode field diameter while minimizing optical propagation loss.
In addition, his patents on optical devices promise high-speed operation, enhanced temperature stability, lower drive voltages, and minimal crosstalk and insertion loss. These devices utilize a conductive single crystal substrate and an epitaxial buffer layer consisting of an oxide, which supports an optical waveguide layer with ferroelectric materials that exhibit electro-optic effects.
Career Highlights
Nashimoto has a distinguished career, having worked for leading companies in the industry, including Fuji Xerox Co., Ltd. and Fuji Xerox Corporation. His dedication and innovative spirit have earned him recognition as a key figure within the realm of optical technology development.
Collaborations
Throughout his career, Nashimoto has collaborated with talented individuals such as Hiroaki Moriyama and Shigetoshi Nakamura. Together, they have worked on various projects to refine and enhance the capabilities of optical devices and systems.
Conclusion
Keiichi Nashimoto continues to be a pioneering inventor in the field of optical technologies. His extensive patent portfolio reflects his commitment to innovation and improvement of optical elements and devices, paving the way for future advancements in this crucial area of technology.