Patent ID: 8873349
Filing Date: 2014-10-28
Classification: G02B,G11B

Abstract:
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, and the assistant layer having a thickness of 100 nm or less; a core layer, the core layer positioned adjacent the assistant layer, the core layer comprising a material having an index of refraction, n3; and a bottom cladding layer, the bottom cladding layer positioned adjacent the core layer, the bottom cladding layer comprising a material having an index of refraction, n4, wherein n1 is less than both n2 and n3, n3 is greater than n1 and n4, and n4 is less than n3 and n2.