Location History:
- Tokyo, JP (2001 - 2006)
- Minato-ku, JP (2006)
Company Filing History:
Years Active: 2001-2006
Title: Innovations of Tadahiko Hanada
Introduction
Tadahiko Hanada is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of optical devices, holding a total of 6 patents. His work focuses on enhancing the functionality and efficiency of waveguide devices.
Latest Patents
One of Hanada's latest patents is a waveguide device that features bent waveguide parts on a substrate of an arrayed waveguide chip. This invention allows for multi-mode operation while being adapted to function as higher order mode filters. By optimizing the relationship between the height and width of the waveguides and the minimum radius of curvature, Hanada's design enables the cutting off of higher order mode light propagation. This results in single-mode light propagation and a reduction in optical coupling loss through optical fibers.
Another notable patent is related to an optical circuit element and its production method. This invention addresses the challenges faced in monitoring propagated light beams within each waveguide of an arrayed waveguide device. By forming waveguide directional couplers in the spaces between the arrayed waveguides, Hanada's method allows for the derivation of monitor light. The monitor light is then guided into cavities at the ends of auxiliary waveguides, where it can be photodetected by photodiodes after being reflected by optical path conversion elements.
Career Highlights
Tadahiko Hanada is associated with NEC Corporation, where he continues to innovate in the field of optical technology. His work has been instrumental in advancing the capabilities of waveguide devices, making them more efficient and effective for various applications.
Collaborations
Hanada has collaborated with notable coworkers such as Yutaka Urino and Takashi Saito, contributing to the development of cutting-edge optical technologies.
Conclusion
Tadahiko Hanada's contributions to the field of optical devices through his innovative patents have significantly impacted the industry. His work continues to pave the way for advancements in waveguide technology, showcasing the importance of innovation in this field.