Company Filing History:
3 out of 389 
2 out of 5,290 
Years Active: 1997-1999
Title: Zhixien Li: Innovator in Optical Measurement Technologies
Introduction
Zhixien Li is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of optical measurement technologies, holding a total of 3 patents. His work focuses on developing innovative solutions for precise measurement in optical systems.
Latest Patents
One of his latest patents is an optical fiber strain measuring apparatus. The objective of this invention is to provide a device that can perform precise measurements without causing fluctuations in signal levels. The apparatus includes a polarization plane rotation device that rotates the plane of polarization of an optical pulse, a photo-directional coupler that projects the optical pulse into the optical fiber to be measured, and a signal processing section that converts the detected light into an electrical signal for measurement.
Another notable patent is a method and apparatus for measuring the noise figure of an optical amplifier. This invention involves inputting an optical pulse signal produced by modulating a continuous laser light into an optical amplifier. The noise figure is measured based on the maximum and minimum photoelectric power of the resultant optical signal, allowing for rapid phase adjustments.
Career Highlights
Zhixien Li has worked with several reputable companies throughout his career. He has been associated with Ando Electric Company and Nippon Telegraph and Telephone Corporation, where he contributed to advancements in optical technologies. His expertise in the field has established him as a key figure in optical measurement innovations.
Collaborations
Throughout his career, Zhixien Li has collaborated with notable professionals in the industry, including Toshio Kurashima and Haruyoshi Uchiyama. These collaborations have further enhanced his contributions to optical measurement technologies.
Conclusion
Zhixien Li's innovative work in optical measurement technologies has led to significant advancements in the field. His patents reflect a commitment to precision and efficiency in optical systems. His contributions continue to influence the industry and inspire future innovations.