Location History:
- Okayama, JP (2009)
- Okayama-ken, JP (2009)
Company Filing History:
Years Active: 2009
Title: Kenji Yoshikawa: Innovator in Semiconductor Laser Technology
Introduction
Kenji Yoshikawa is a prominent inventor based in Okayama, Japan. He has made significant contributions to the field of semiconductor laser technology, holding 2 patents that showcase his innovative approach to laser devices.
Latest Patents
Yoshikawa's latest patents include a semiconductor laser device and its manufacturing method. The first patent describes a semiconductor laser device that consists of a first and a second semiconductor laser element. The first semiconductor laser element features a first end face window structure that includes first impurities formed near its end face. In contrast, the second semiconductor laser element has a second end face window structure with second impurities. Notably, the distance from the lower end of the first active layer to the lower end of the first end face window structure is shorter than that of the second active layer to its corresponding end face window structure.
The second patent focuses on a monolithic dual-laser semiconductor laser device capable of high power output. In this design, a window structure for each laser element is formed through a common step, enhancing the device's reliability. This semiconductor laser device integrates an infrared laser element and a red laser element on an n-type semiconductor substrate. Each of these elements features a ridged waveguide and a window structure formed by Zn diffusion at each resonator facet. The p-type contact layers on the ridges of the respective waveguides are thinner than the standard p-type contact layer.
Career Highlights
Kenji Yoshikawa has built a successful career at Panasonic Corporation, where he has been instrumental in advancing semiconductor laser technology. His work has contributed to the development of reliable and efficient laser devices that have applications in various fields.
Collaborations
Yoshikawa has collaborated with notable coworkers, including Takayuki Kashima and Kouji Makita, who have also contributed to advancements in semiconductor technology.
Conclusion
Kenji Yoshikawa's innovative work in semiconductor laser technology has led to significant advancements in the field. His patents reflect a commitment to improving device reliability and performance, making him a key figure in the industry.