Inventor

JOHNSON DERWYN C

CA23 patents

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

JOHNSON DERWYN C

UNITED KINGDOM GOVERNMENT

Method of creating an index grating in an optical fiber and a mode converter using the index grating

Method of fabricating Bragg gratings using a silica glass phase grating mask and mask used by same

Method of creating an index grating in an optical fiber and a mode converter using the index grating

Photosensitization of optical fiber and silica waveguides

Polarization insensitive grating in a planar channel optical waveguide and method to achieve the same

Polarization insensitive grating in a planar channel optical waveguide and method to achieve the same

Coupler fabrication techniques for dissimilar fibers

Passive fiber optic data bus configurations

Method and device for reducing polarization dependence in an optical component or optical system

Simplified wdm fused fiber coupler design

Coupler fabrication techniques for dissimilar fibers

CANADIAN PATENTS DEV

Optical fiber coupler with tunable coupling ratio and method of making

Wavelength selective optical devices using optical directional coupler

Low loss access coupler for multimode optical fiber distribution systems

Optical fiber reflective filter

Low-loss star couplers for optical fiber systems

CW Brillouin ring laser

Optical couplers for fiber optic communication links

Fabrication technique for low-loss fused taper directional couplers and pressure sensor produced thereby

Method for making a grating assisted optical waveguide device

HILL KENNETH O

Directional coupler utilizing biconically tapered optical fibers and a method of making same

CA MINISTER INDUSTRY

Method and device for reducing polarization dependence in an optical component or optical system

HER MAJESY IN RIGHT OF CANADA

Method of fabricating Bragg gratings using a silica glass phase grating mask and mask used by same