Natsumi Ueda

Title: Innovations of Natsumi Ueda: Pioneering Semiconductor Laser Technologies

Introduction

Natsumi Ueda is a prominent inventor based in Tokyo, Japan, known for her contributions to semiconductor laser technology. With a total of two patents to her name, Ueda's work has significantly advanced the field, making her a noteworthy figure in the realm of innovations.

Latest Patents

Her latest patents showcase her expertise in semiconductor laser devices. One of her key inventions is the surface emitting semiconductor laser device, which utilizes an oxidized-Al current confinement structure. This device achieves a resonant wavelength for the fundamental transverse mode, which is equal to or shorter than the laser device's peak-gain wavelength at specified temperatures. Notably, it operates efficiently in a single-transverse mode, enhancing its performance and application potential.

Another significant invention by Ueda is the vertical cavity surface emitting laser (VCSEL) device. This sophisticated device features a pair of diffusion Bragg reflectors (DBRs), which sandwich a multiple quantum well (MQW) consisting of active layers. The bottom DBR includes a lower layer structure with AlAs layers of high thermal conductivity and AlGaAs layers. The top layer of the bottom DBR is a selectively oxidized AlAs layer, featuring both an Al-oxidized area and a non-oxidized layer to confine the current injection path. These innovations are pivotal in creating more efficient and effective semiconductor lasers.

Career Highlights

Ueda works at The Furukawa Electric Co., Ltd., where she has been instrumental in developing cutting-edge laser technologies. Her career is marked by a commitment to scientific research and practical applications of her inventions, contributing to advancements in optical communications and related industries.

Collaborations

Throughout her career, Ueda has collaborated with renowned colleagues, including Noriyuki Yokouchi and Tatsuyuki Shinagawa. These partnerships have facilitated the exchange of ideas and technical expertise, further enhancing the impact of her work in the field of semiconductor lasers.

Conclusion

Natsumi Ueda stands out as an innovative inventor in Japan’s semiconductor technology landscape. Her contributions, particularly in the form of patents for surface emitting and vertical cavity surface emitting laser devices, reflect her commitment to pushing the boundaries of technology. As the field continues to evolve, Ueda's inventions are poised to inspire future innovations and applications in laser technology.