Shunji Matsuoka

Title: Shunji Matsuoka: Innovator in Light Modulation Technology

Introduction

Shunji Matsuoka is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of optical technology, particularly in light modulation devices. With a total of 4 patents to his name, Matsuoka's work has paved the way for advancements in optical integrated circuits.

Latest Patents

One of Matsuoka's latest inventions is a light modulation device that comprises a substrate, a substrate layer, an optical waveguide layer, and buffer layers, all formed of either n-type or p-type compound semiconductor crystal. This innovative device captures light in the optical waveguide layer by ensuring that the refractive index is at least approximately 0.1% higher in the optical waveguide layer than in the substrate layer and buffer layers. The low carrier density in the optical waveguide layer allows the applied voltage to be focused mainly on this layer, resulting in a device that is free from strict etching process conditions and has minimal light absorption loss. This makes it suitable for use as a component in monolithic optical integrated circuits.

Another notable patent involves diffraction gratings and optical branching filter elements. This optical branching filter element consists of a substrate with a waveguide made from a material capable of reversibly changing its refractive index, along with an erasable diffraction grating formed on the waveguide. The diffraction grating can be created using a holographic exposure method or a light beam scanning method and can be erased by appropriate means.

Career Highlights

Shunji Matsuoka is currently associated with Sumitomo Electric Industries, Limited, where he continues to innovate in the field of optical technologies. His work has been instrumental in developing devices that enhance the efficiency and functionality of optical systems.

Collaborations

Matsuoka has collaborated with notable colleagues such as Yoshikazu Nishiwaki and Kenji Okamoto. These partnerships have contributed to the advancement of his research and the successful development of his inventions.

Conclusion

Shunji Matsuoka's contributions to light modulation technology and optical devices have established him as a key figure in the field. His innovative patents reflect a commitment to advancing optical technology, making significant impacts on the industry.