Company Filing History:
Years Active: 2005-2012
Title: Kazuyoshi Yamaki: Innovator in Optical Transmission Technology
Introduction
Kazuyoshi Yamaki is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of optical transmission technology, holding a total of 2 patents. His work focuses on enhancing the efficiency and reliability of optical systems.
Latest Patents
Yamaki's latest patents include an innovative optical transmitter that automatically controls the biasing of an optical duobinary transmitter using a single-drive LN-MZ modulator. This technology involves amplitude modulating a low-frequency signal onto a voltage signal input into a Mach-Zehnder optical modulator. The optical output from the modulator is detected by an optical detection subsystem. In the bias control subsystem, the low-frequency signal component is detected from the optical output, allowing for the control of a DC bias voltage applied to the optical modulator. This ensures that the low-frequency signal component is either minimized or maximized.
Another notable patent is for an optical transmitter and optical transmission system using an electro-absorption modulator. This invention maintains constant modulator output and ensures highly reliable optical transmission by tuning the alpha parameter for specific systems. The system detects changes in the driving point of the electro-absorption optical modulator and compensates the modulator output accordingly, addressing issues related to passing degradation.
Career Highlights
Kazuyoshi Yamaki is currently employed at Opnext Japan, Inc., where he continues to develop cutting-edge optical technologies. His work has significantly impacted the field, making optical systems more efficient and reliable.
Collaborations
Yamaki has collaborated with notable colleagues, including Hideyuki Serizawa and Shigehiro Takashima. Their combined expertise has contributed to the advancement of optical transmission technologies.
Conclusion
Kazuyoshi Yamaki's innovative work in optical transmission technology has led to significant advancements in the field. His patents reflect a commitment to improving the efficiency and reliability of optical systems.