Company Filing History:
Years Active: 1984
Title: Innovations of Toshihito Hosaka
Introduction
Toshihito Hosaka is a notable inventor based in Mito, Japan. He has made significant contributions to the field of optical fibers, particularly with his innovative designs that enhance performance and efficiency. His work has implications for various applications in telecommunications and data transmission.
Latest Patents
Toshihito Hosaka holds a patent for a single-polarization single-mode optical fiber. This invention features an elliptical core and includes a pair of stress applying parts on both sides of the minor radius of the core. The design applies asymmetrical stress to the core, which is embedded in a clad. The stress applying parts are made of B₂O₃, and the relative refractive index difference (Δ) between the core and the clad is maintained within the range of 0.004 to 0.05. The ellipticity (ε) of the core satisfies a relation of 0.01 to 0.9. The B₂O₃ has a molar concentration of 1 to 25 mole %, and the ratio of the thickness of the stress applying parts to the core is between 5 to 15. The modal birefringence (B) is expressed by the equation B=(βₓ - βᵧ)/k, which satisfies a relation of B=1×10⁻⁶. This invention effectively eliminates polarization mode dispersion, ensuring that the delay time difference between the HE₁₁ⁿₓ and HE₁₁ⁿᵧ modes is zero.
Career Highlights
Toshihito Hosaka is associated with Nippon Telegraph and Telephone Public Corporation, where he has been instrumental in advancing optical fiber technology. His work has been recognized for its innovative approach and practical applications in the telecommunications industry.
Collaborations
Toshihito has collaborated with notable colleagues such as Katsunari Okamoto and Yutaka Sasaki. Their combined expertise has contributed to the development of cutting-edge technologies in the field of optical communications.
Conclusion
Toshihito Hosaka's contributions to the field of optical fibers demonstrate his innovative spirit and commitment to advancing technology. His patent for a single-polarization single-mode optical fiber is a testament to his expertise and the potential impact of his work on the telecommunications industry.