Location History:
- Sapporo, JP (2005 - 2006)
- Kawasaki, JP (2007)
Company Filing History:
Years Active: 2005-2007
Title: Takashi Ishiwada: Innovator in Optical Technology
Introduction
Takashi Ishiwada is a prominent inventor based in Sapporo, Japan. He has made significant contributions to the field of optical technology, holding a total of 3 patents. His work focuses on enhancing optical devices, making them more efficient and cost-effective.
Latest Patents
Ishiwada's latest patents include an innovative optical amplifier that utilizes a reflection-type variable optical attenuator for feedback. This optical apparatus reduces the number of optical devices arranged on the main optical signal transmission path, thereby minimizing the size and cost of the device while improving optical transmission quality. The optical amplifier features an amplification medium doped with an active material for optical amplification, which receives pump light to amplify the optical signal for output. Additionally, the reflection-type variable optical attenuator incorporates a reflecting mirror that generates reflected light and a magneto-optical crystal that varies the attenuation amount of the amplified optical signal through a magnetic field.
Another notable patent is the transmission wavelength characteristics variable optical element, which aims to easily realize an optical element using an etalon type structure. This invention allows for changing periodic transmission wavelength characteristics in the axial direction of transmissivity and adjusting periodic characteristics concerning wavelength. The optical element consists of a light interference section with a pair of wedge-shaped magneto-optic crystals, movable sections for adjusting the distance between reflecting films, and a variable current source for controlling the electromagnet.
Career Highlights
Takashi Ishiwada is currently employed at Fujitsu Corporation, where he continues to develop cutting-edge optical technologies. His work has significantly impacted the efficiency and functionality of optical devices in various applications.
Collaborations
Ishiwada has collaborated with notable colleagues, including Hirotomo Izumi and Nobuaki Mitamura, contributing to advancements in optical technology through teamwork and shared expertise.
Conclusion
Takashi Ishiwada's innovative work in optical technology has led to the development of several important patents that enhance the efficiency and quality of optical devices. His contributions continue to shape the future of optical technology.