Patent · US Expired

Cutoff-mesa isolated rib optical waveguide for III-V heterostructure photonic integrated circuits

US5745630A · kind A · utility

24Cited by
8References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateFeb 22, 1996
Grant dateApr 28, 1998
Priority date—
Expiry dateFeb 22, 2016

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B2006/12097
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A cutoff mesa rib waveguide provides single-mode performance regardless of any deep etches that might be used for electrical isolation between integrated electrooptic devices. Utilizing a principle of a cutoff slab waveguide with an asymmetrical refractive index profile, single mode operation is achievable with a wide range of rib widths and does not require demanding etch depth tolerances. This new waveguide design eliminates reflection effects, or self-interference, commonly seen when conventional rib waveguides are combined with deep isolation etches and thereby reduces high order mode propagation and crosstalk compared to the conventional rib waveguides.

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