Location History:
- Kodaira, JP (1994 - 1996)
- Yono, JP (1995 - 1996)
Company Filing History:
4 out of 42,517 
1 out of 217 
Years Active: 1994-1996
Title: The Innovations of Shoichi Hanatani
Introduction
Shoichi Hanatani is a notable inventor based in Kodaira, Japan. He has made significant contributions to the field of optical technology, holding a total of 4 patents. His work primarily focuses on methods and apparatuses that enhance the performance of optical receivers.
Latest Patents
One of Hanatani's latest patents is a method and apparatus for testing a DC coupled optical receiver. This innovative method involves superimposing DC light on an optical signal, allowing for the observation of waveforms at a light extinction level. The technique enables the measurement and prediction of the bit error rate. Additionally, in a multi-channel DC coupled optical receiver, DC light is applied to the channel being observed while signal light is applied to other channels to assess cross-talk. Another significant invention is the superlattice avalanche photodiode (APD). This device features a light absorption layer that generates carriers by absorbing light, a multiplication layer that amplifies the carriers, and a pair of electrodes for driving the carriers. The multiplication layer is characterized by a superlattice structure with a well layer less than 10 nm in thickness and a barrier layer between 10 nm and 20 nm in thickness, deposited in alternating layers.
Career Highlights
Throughout his career, Hanatani has worked with prominent companies such as Hitachi, Ltd. and Hitachi Device Engineering Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in optical technology.
Collaborations
Hanatani has collaborated with notable colleagues, including Hitoshi Nakamura and Tsukuru Ohtoshi. Their combined expertise has contributed to advancements in the field of optical technology.
Conclusion
Shoichi Hanatani's contributions to optical technology through his patents and collaborations highlight his role as a significant inventor in the industry. His innovative methods and devices continue to influence advancements in optical receiver technology.