Patent · US Expired

Dielectric waveguide with elongate cross-section

US4307938A · kind A · utility

242Cited by
6References
8Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMar 3, 1980
Grant dateDec 29, 1981
Priority date—
Expiry dateMar 3, 2000

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B6/10
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A dielectric waveguide comprises a wave propagating member having a core with a refractive index n.sub.1 and a cladding with a refractive index n.sub.2, the core having an elongate cross-section with a major axis a and a minor axis b. The values of n.sub.1, n.sub.2, a and b are such that only the two orthogonally polarized fundamental modes of a wave with a prescribed wavelength can propagate through the core, thereby avoiding propagation of unwanted higher order modes of the wave, and such that the group velocities of the two orthogonally polarized fundamental modes are substantially equal so that any accidental coupling between the fundamental modes does not reduce the bandwidth of the waveguide.

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