Location History:
- Tokyo, JP (2009)
- Atsugi, JP (2005 - 2011)
Company Filing History:
3 out of 164 
2 out of 5,290 
Years Active: 2005-2011
Title: Innovations of Yukihiro Hirota in Avalanche Photodiodes
Introduction
Yukihiro Hirota is a notable inventor based in Atsugi, Japan. He has made significant contributions to the field of photonics, particularly in the development of avalanche photodiodes (APDs). With a total of 3 patents, his work focuses on enhancing the performance and reliability of these devices.
Latest Patents
Hirota's latest patents include an innovative avalanche photodiode featuring a doping region with a monotonically increasing concentration distribution. This design addresses the need to prevent dark current increases and secure the device's lifespan. By utilizing an InP buffer layer with an n-type doping region, a predetermined doping profile is achieved through ion implantation. This approach relaxes the electric field concentration in the avalanche multiplication layer, thereby improving the device's reliability while reducing production costs. Another significant patent describes an ultra-high-speed APD that simultaneously reduces operating voltage and enhances quantum efficiency. The doping concentration distribution of the light-absorbing layers is carefully determined to maintain p-type neutrality, ensuring optimal performance.
Career Highlights
Throughout his career, Yukihiro Hirota has worked with prominent companies such as NTT Electronics Corporation and Nippon Telegraph and Telephone Corporation. His experience in these organizations has allowed him to refine his expertise in photonics and semiconductor technologies.
Collaborations
Hirota has collaborated with esteemed colleagues, including Tadao Ishibashi and Seigo Ando. These partnerships have contributed to the advancement of his research and the successful development of innovative technologies.
Conclusion
Yukihiro Hirota's contributions to the field of avalanche photodiodes demonstrate his commitment to innovation and excellence. His patents reflect a deep understanding of the complexities involved in photonic devices, paving the way for future advancements in the industry.