Patent ID: 9316783
Filing Date: 2016-04-19
CPC Classification: G02B,G11B

Claim Text:
1. A waveguide comprising: a top cladding layer, the top cladding layer comprising a material having an index of refraction, n1; an assistant layer, the assistant layer positioned adjacent the top cladding layer, the assistant layer comprising a material having an index of refraction, n2; a core layer, the core layer positioned adjacent the assistant layer, the core layer comprising a lower core layer having a lower core layer index of refraction and an upper core layer having an upper core layer index of refraction, wherein the upper core layer is adjacent the assistant layer and; and a bottom cladding layer comprising a material having an index of refraction, n4, and wherein the lower core layer is positioned adjacent the bottom cladding layer wherein n1 is less than n2, and n4 is less n2.