Mitsuteru Yoshida

Title: Mitsuteru Yoshida and Optical Signal Control

Introduction

Mitsuteru Yoshida is an inventor associated with NTT Corporation and based in Musashino-shi, Japan. His patent work addresses optical communications, including the control of signal compensation and sampling in an optical transmission system.

Latest Patents

Yoshida is associated with 1 patent, titled “Optical Signal Controller, Optical Signal Control Method, and Optical Signal Transmission System.” The invention describes an optical signal control apparatus that adjusts both an equalizer’s compensation coefficient and the sampling phase of a digital-to-analog converter (DAC) in an optical transmitter.

The apparatus calculates a sampling-phase adjustment from the group-delay difference between in-phase and quadrature components, using device and transmission-path characteristics. It also calculates an equalizer compensation coefficient so that the DAC’s phase characteristic at the Nyquist frequency is zero or an integer multiple of π. These calculated values are sent to the DAC and equalizer, respectively.

Career Highlights

The available information connects Yoshida’s patent activity with NTT Corporation. His described invention focuses on coordinating equalization and sampling-phase control to support optical signal transmission.

Collaborations

Yoshida’s listed company affiliation is NTT Corporation. The provided information does not identify additional collaborators or organizations associated with this patent.

Conclusion

Mitsuteru Yoshida’s patent concerns coordinated control of an optical transmitter’s equalizer and DAC, contributing to the technical development of optical signal transmission.