Toshifumi Hasama

Title: Innovations of Toshifumi Hasama

Introduction

Toshifumi Hasama is a notable inventor based in Tsukuba, Japan. He has made significant contributions to the field of optical technology, particularly in the development of wavelength domain optical switches. With a total of three patents to his name, Hasama's work showcases his expertise and innovative spirit.

Latest Patents

One of Hasama's latest patents is the "Wavelength Domain Optical Switch." This invention aims to provide a waveguide type wavelength domain optical switch that allows for the use of a cost-effective lens. It also corrects aberrations of the demultiplexed wavelengths produced in multiple waveguide type demultiplexing circuits. The design includes an integrated element formed by laminating three or more waveguide type demultiplexing circuits, a first lens for collecting light emitted from the integrated element, and a polarization separation element that separates light into X and Y polarizations. Additionally, it features a second lens for collecting these polarizations and reflective optical phase modulators to manage the light input into the demultiplexing circuits.

Another significant patent is the "Optical Waveguide-Type Wavelength Domain Switch." This invention comprises a waveguide-type multi/demultiplexing device laminate that includes three or more laminated devices. It features a lens system positioned on the demultiplex side and a reflective optical phase-modulating cell on the opposite side. The lens system is designed to enhance the light-collecting or collimating functions, ensuring efficient operation of the device.

Career Highlights

Toshifumi Hasama has worked with prestigious organizations such as the National Institute of Advanced Industrial Science and Technology and Hitachi Cable, Inc. His experience in these institutions has allowed him to refine his skills and contribute to groundbreaking advancements in optical technology.

Collaborations

Hasama has collaborated with notable colleagues, including Hiroshi Ishikawa and Masahiko Mori. These partnerships have fostered a creative environment that has led to innovative solutions in their respective fields.

Conclusion

Toshifumi Hasama's contributions to optical technology through his patents and collaborations highlight his role as a significant inventor in the industry. His work continues to influence advancements in wavelength domain optical switches, showcasing the importance of innovation in technology.