Location History:
- Mito, JP (1996)
- Tokyo, JP (2018)
- Tsukuba, JP (2019 - 2020)
Company Filing History:
8 out of 5,290 
1 out of 2,637 
Years Active: 1996-2020
Title: Fumihiko Yamamoto: Innovator in Optical Fiber Design
Introduction
Fumihiko Yamamoto is a prominent inventor based in Tsukuba, Japan. He has made significant contributions to the field of optical fiber technology, holding a total of 8 patents. His innovative approaches have paved the way for advancements in optical communication systems.
Latest Patents
Yamamoto's latest patents focus on optical fiber design methods. One of his inventions is a design method for a photonic crystal fiber that features multiple holes arranged along its length. This method calculates the required effective cross-sectional area based on light wavelength, transmission distance, and output power. The design ensures that the hole ratio is greater in the central area than in the outer area, optimizing the fiber's performance. Another patent provides a beam propagating method that meets specific output power and propagation distance requirements while maintaining beam quality. This method involves calculating an effective core cross-sectional area and adjusting the optical fiber's structure accordingly.
Career Highlights
Throughout his career, Fumihiko Yamamoto has worked with notable companies, including Nippon Telegraph and Telephone Corporation and The Furukawa Electric Co., Ltd. His work has significantly impacted the development of optical fiber technologies.
Collaborations
Yamamoto has collaborated with esteemed colleagues such as Takashi Matsui and Kyozo Tsujikawa. Their combined expertise has contributed to the advancement of optical fiber design and technology.
Conclusion
Fumihiko Yamamoto's innovative work in optical fiber design has led to numerous patents and advancements in the field. His contributions continue to influence the future of optical communication technologies.