Haruo Hosomatsu

Title: Haruo Hosomatsu: Innovator in Semiconductor Laser Technology

Introduction

Haruo Hosomatsu is a distinguished inventor based in Tokyo, Japan. He is known for his significant contributions to the field of semiconductor laser technology. His innovative work has led to the development of a unique semiconductor laser that has garnered attention in the scientific community.

Latest Patents

Hosomatsu holds a patent for a distributed feedback semiconductor laser. This invention features a diffractive grating on an active layer, which generates stimulated emission by recombining electrons with positive holes. The design allows for precisely single wavelength longitudinal mode lasing, achieved through a thin buffer layer grown on the surface of the semiconductor layer. The irregular pattern etched into the semiconductor corresponds to the diffractive grating, maintaining the integrity of the corrugated pattern. The active layer is carefully grown to fill the valleys of this pattern, forming a diffractive grating that facilitates light distributed feedback through periodic perturbation of gain coefficients.

Career Highlights

Hosomatsu is currently associated with Optical Measurement Technology Development Co., Ltd., where he continues to advance his research and development efforts. His work has been pivotal in enhancing the performance and efficiency of semiconductor lasers.

Collaborations

Throughout his career, Hosomatsu has collaborated with notable colleagues, including Kunio Tada and Yoshiaki Nakano. These partnerships have contributed to the success of his projects and the advancement of semiconductor laser technology.

Conclusion

Haruo Hosomatsu's innovative contributions to semiconductor laser technology exemplify the impact of dedicated research and development in the field. His patent and ongoing work continue to influence advancements in optical measurement technologies.