This inventor holds 12 USPTO granted patents. Top assignee: Fujitsu Corporation. Active years: 2000-2006.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Hachioji, JP (2000)
- Kanagawa, JP (2002)
- Kawasaki, JP (2001 - 2006)
Company Filing History:
Years Active: 2000-2006
Title: The Innovations of Shin-ichirou Harasawa
Introduction
Shin-ichirou Harasawa is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of optical transmission systems, holding a total of 12 patents. His work focuses on enhancing the efficiency and reliability of optical communication technologies.
Latest Patents
One of Harasawa's latest patents is an optical transmission system in which gains in gain bands are remotely controlled by transmitting tone signals with variable characteristics. In this system, an optical terminal transmits multiple tone signals corresponding to various gain bands, each with distinct frequencies. The characteristics of these tone signals are adjusted based on the detected power of optical signals in their respective gain bands. Optical repeaters then receive these tone signals, extract their characteristics, and compare them with reference signals to control the gains of optical amplification, ensuring equalized gains across the bands.
Another notable patent is an optical transmission system that guarantees high-quality monitor control even in the event of an optical fiber fault. This system includes a monitor instruction sending unit, an operating condition recognizing unit, and a filtering unit. The monitor control unit oversees the operating condition of its repeater, generating response information. Additionally, a pump unit produces pump light for Raman amplification within the optical fiber transmission medium, while a regeneration control unit manages the regeneration of response signals.
Career Highlights
Shin-ichirou Harasawa is currently employed at Fujitsu Corporation, where he continues to innovate in the field of optical technologies. His work has been instrumental in advancing the capabilities of optical communication systems, making them more efficient and reliable.
Collaborations
Harasawa has collaborated with notable colleagues such as Hiroyuki Deguchi and Takeo Osaka, contributing to various projects that enhance optical transmission technologies.
Conclusion
Shin-ichirou Harasawa's contributions to optical transmission systems have significantly impacted the field of communication technology. His innovative patents reflect his dedication to improving the efficiency and reliability of optical systems.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile