Inventor

YAMAUCHI RYOZO

JP27 patents

⚠️ This page may combine multiple inventors who share the name “YAMAUCHI RYOZO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

YAMAUCHI RYOZO

FUJIKURA LTD

Polarized wave holding optical fiber, production method therefor, connection method therefor, optical amplifier, laser oscillator and polarized wave holding optical fiber coupler

Optical fiber having a core with a repeatedly changing constitutional parameter

Optical fiber and optical transmission system

Multimode optical fiber with a higher order mode removing function

Method of manufacturing polarization-maintaining optical fiber coupler

Dispersion compensating optical fiber

Optical filter with planar optical waveguide having periodically varied distribution of refractive index and production process thereof

Optical fiber filter

Solution doping of a silica preform with erbium, aluminum and phosphorus to form an optical fiber

Method for splicing and reinforcing carbon coated optical fibers

Optical waveguide grating and production method therefor

Optical fiber coupler and a fabrication method for the same

Method of manufacturing a preform for asymmetrical optical fiber

Optical fiber grating and manufacturing method thereof

Optical fiber grating and manufacturing method therefor

Optical-fiber coupler and manufacturing process therefor

Erbium-doped silica optical fiber preform

Method for splicing and reinforcing carbon coated optical fibers

Optical fiber coupler

Optical fiber coupler manufacturing device

Polarization-maintaining optical fiber and polarization-maintaining optical fiber component

Manufacturing method for polarization maintaining optical fiber couplers

Method of manufacturing a preform for asymmetrical optical fiber

Dispersion compensating optical fiber and dispersion compensating optical fiber module

Dispersion compensating optical fiber and dispersion compensating optical fiber module

(unassigned)

Multiple wavelength excitation optical multiplexing device, multiple wavelength excitation light source incorporating aforementioned device, and optical amplifier

Method of making an optical waveguide grating with two dissimilar irradiating steps