This inventor holds 8 USPTO granted patents. Top assignees: Nec Corporation, Nec Electronics Corporation, Renesas Electronics Corporation. Active years: 1994-2013.
Location History:
- Tokyo, JP (1994 - 2000)
- Kanagawa, JP (2009 - 2013)
Company Filing History:
5 out of 36,653 
2 out of 2,467 
1 out of 7,649 
Years Active: 1994-2013
Title: Shotaro Kitamura: Innovator in Semiconductor Laser Technology
Introduction
Shotaro Kitamura is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of semiconductor laser technology, holding a total of 8 patents. His work focuses on enhancing the performance and stability of semiconductor laser devices.
Latest Patents
Among his latest patents is a semiconductor laser diode device and method of fabrication thereof. This invention discloses a distributed feedback semiconductor laser diode device capable of operating at a high output ratio of forward and backward optical power while ensuring satisfactory stability of single-mode oscillation. The device includes a diffraction grating formed in its optical waveguide, which features an alternately repetitive pattern of a grating part with a distributive refractivity characteristic and a no-grating space part with a uniform refractivity characteristic. The no-grating space part has an optical path length that is half an integral multiple of a wavelength of laser oscillation, while the grating part includes at least five grating periods. Another notable patent is a method for manufacturing a semiconductor laser device, which presents improved throughput by eliminating the influence of crystallinity deterioration in the epitaxial layer. This method involves forming a diffraction grating on a semiconductor substrate and creating a multiple-layered film by forming an epitaxial layer on the diffraction grating.
Career Highlights
Shotaro Kitamura has worked with notable companies such as NEC Corporation and NEC Electronics Corporation. His experience in these organizations has contributed to his expertise in semiconductor technology and innovation.
Collaborations
He has collaborated with esteemed colleagues, including Yasutaka Sakata and Tatsuya Sasaki, further enhancing his contributions to the field.
Conclusion
Shotaro Kitamura's innovative work in semiconductor laser technology has led to significant advancements in the industry. His patents reflect a commitment to improving device performance and stability, making him a key figure in the field of semiconductor lasers.