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1. (WO2017039696) TAPERED OPTICAL WAVEGUIDES

Pub. No.:    WO/2017/039696    International Application No.:    PCT/US2015/048625
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Sep 05 01:59:59 CEST 2015
IPC: G02B 6/122
Applicants: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
Inventors: SEYEDI, Mir Ashkan
CHEN, Chin-Hui
Title: TAPERED OPTICAL WAVEGUIDES
Abstract:
An apparatus includes an optical rib waveguide on a substrate, the optical rib waveguide further includes: a slab layer of silicon, a shallow rib of silicon in height that tapers laterally along a taper region, a deep rib of silicon that meets the shallow rib along the taper region of the shallow rib, and wherein the deep rib and the shallow rib have a same width, and wherein the shallow rib has a greater height than the deep rib, a core of silicon that tapers laterally in a range of 50-90% and extends on top of the deep rib and the shallow rib, and a cladding layer of silicon oxide that covers the slab, core, deep rib, and shallow rib.