Akio Shirasaki

Title: Akio Shirasaki: Innovator in Optical Modules

Introduction

Akio Shirasaki is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of optical technology, holding a total of 4 patents. His work primarily focuses on the development of advanced optical modules that enhance performance and efficiency.

Latest Patents

One of Shirasaki's latest patents is an optical module that comprises a semiconductor laser, an optical receiver, and a lens mounted on a carrier. This innovative design includes an optical fiber and a control circuit that regulates the injection current of the laser to maintain a constant output current. The lens and part of the receiver are fixed to the carrier using resin bonding materials that undergo thermosetting shrinkage. The initial positions of the laser, the tip end of the optical fiber, the receiver, and the lens are strategically determined to ensure consistent optical coupling efficiency characteristics over time, even when exposed to elevated environmental temperatures.

Another notable patent involves an optical module featuring a restriction body fixed to a stem, which has a linear thermal expansion coefficient smaller than that of the stem. This design includes a thermoelectric cooler with a heat-releasing substrate fixed to the stem's surface, a semiconductor laser element, and a cap that covers the cooler and laser. The lens is also fixed to the cap, while the restriction body is attached to the opposite surface of the stem. This configuration optimizes thermal management and enhances the module's overall performance.

Career Highlights

Akio Shirasaki is currently employed at Mitsubishi Electric Corporation, where he continues to innovate in the field of optical technology. His work has been instrumental in advancing the capabilities of optical modules, making them more efficient and reliable.

Collaborations

Shirasaki has collaborated with notable colleagues, including Norio Okada and Tatsuki Otani. Their combined expertise has contributed to the successful development of various optical technologies.

Conclusion

Akio Shirasaki is a distinguished inventor whose work in optical modules has led to significant advancements in the field. His innovative patents reflect his commitment to enhancing optical technology, making a lasting impact on the industry.