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

Patent · Thu Jan 01 00:00:00 EST 1998

OSTI ID:871516

Vawter, Gregory A ^[1]; Smith, Robert E ^[1]

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1. Albuquerque, NM

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.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• DOE Contract Number: AC04-94AL85000
• Assignee: Sandia Corporation (Albuquerque, NM)
• Patent Number(s): US 5745630
• OSTI ID: 871516
• Country of Publication: United States
• Language: English

Related Subjects

cutoff-mesa
isolated
rib
optical
waveguide
iii-v
heterostructure
photonic
integrated
circuits
cutoff
mesa
provides
single-mode
performance
regardless
deep
etches
electrical
isolation
electrooptic
devices
utilizing
principle
slab
asymmetrical
refractive
index
profile
single
mode
operation
achievable
wide
range
widths
require
demanding
etch
depth
tolerances
design
eliminates
reflection
effects
self-interference
commonly
seen
conventional
waveguides
combined
reduces
propagation
crosstalk
compared
integrated circuits
refractive index
wide range
integrated circuit
single mode
optical waveguide
electrical isolation
rib waveguide
optical wave
optic device
cutoff mesa
index profile
photonic integrated
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