Cutoff-mesa isolated rib optical waveguide for III-V heterostruc

Details Cutoff-mesa isolated rib optical waveguide for III-V heterostruc Cutoff-mesa isolated rib optical waveguide for III-V heterostruc

1996-02-22

1998-04-28

Ullah, Akm E.

Optical waveguides

Planar optical waveguide

385 4, G02B 610

Patent

active

057456305

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.

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