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

Patent · Wed Dec 31 23:00:00 EST 1997

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 CORP
• 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

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achievable
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cutoff mesa
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deep
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