Patent · US Expired

Metal-ferromagnetic optical waveguide isolator

US5598492A · kind A · utility

13Cited by
3References
8Claims
0Family size

Inventor

Key dates

Filing dateOct 10, 1995
Grant dateJan 28, 1997
Priority date—
Expiry dateOct 10, 2015

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10S372/703
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

An optical device includes a body of a semiconductor material having a waveguide therein along which light flows and means for providing gain to the light. A layer of an amorphous or polycrystalline metallic-ferromagnetic material extends along the waveguide and means, such as a permanent magnet, provides a magnetic field to the metallic-ferromagnetic material layer. This provides an optical isolator of the Faraday rotation type which can be integrated with a variety of material systems including those commonly used to fabricate semiconductor lasers, arrays and amplifiers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.