Company Filing History:
Years Active: 1987-1995
Title: Minoru Shikada: Innovator in Light Transmission Technology
Introduction
Minoru Shikada is a prominent inventor based in Tokyo, Japan, known for his significant contributions to light transmission technology. With a total of seven patents to his name, Shikada has made remarkable advancements in the field of optical communication.
Latest Patents
One of Shikada's latest patents is a light transmission device capable of stably transmitting a modulated light beam. This device operates in response to a sequence of input digital signals, producing an output light beam. The modulated light beam is generated from a laser device through frequency shift keying, which is executed under a designed modulation index. The output light beam is transmitted while also being sent to a Fabry-Perot interferometer, resulting in an optical output beam that varies based on modulation index changes. A feedback signal is utilized to adjust the modulation index of the laser device, ensuring it aligns with the designed modulation index. Additionally, a controller may be included to manage the central frequency of the output light beam by generating a bias signal that is added to the feedback signal.
Another notable patent is a method for the transmission and receipt of coherent light signals. In this method, each subscriber is equipped with an optical heterodyne detection circuit. The oscillation light from an optical local oscillator is divided into a local oscillation light for heterodyne detection and a transmitting light for data communication. A channel for these lights is selected from available communication channels, and the transmitting light can be sourced from a transmission light oscillator controlled by a common control unit.
Career Highlights
Minoru Shikada has established a successful career at NEC Corporation, where he has been instrumental in developing innovative technologies in optical communication. His work has significantly impacted the efficiency and reliability of light transmission systems.
Collaborations
Shikada has collaborated with notable colleagues, including Katsumi Emura and Masahiko Fujiwara, contributing to various projects that enhance the capabilities of optical technologies.
Conclusion
Minoru Shikada's contributions to light transmission technology through his patents and work at NEC Corporation highlight his role as a leading inventor in the field. His innovative approaches continue to shape the future of optical communication.