Patent ID: 9151916
Filing Date: 2015-10-06
Classification: G02B

Abstract:
1. An optical core (CORE) sub-assembly allowing an optoelectronic (OE) device on a supporting substrate to be precisely aligned with a fiber optic assembly, comprising: a first substrate bonded to a supporting substrate with an OE, the first substrate having an optically transparent portion and a first alignment feature, the first alignment feature allowing the optically transparent portion to be aligned with the OE device to within a predetermined first tolerance; a second substrate bonded to an opposite side of the first substrate, the second substrate having a lens and a second alignment feature, the second alignment feature allowing the lens to be aligned with the optically transparent portion of the first substrate to within a predetermined second tolerance; and a third substrate bonded to an opposite side of the second substrate, the third substrate having a transparent portion and a third alignment feature, the third alignment feature allowing a fiber optic assembly to be aligned with the transparent portion to within a predetermined tolerance, wherein the first, second and third alignment features maintain an alignment of an optical ray between the OE and the fiber optic assembly, and wherein by selection of a material type for the first, second, and third substrate, the substrates have a coefficient of thermal expansion (CTE) that match within approximately +/−5 ppm/C; wherein the third substrate is a hybrid, comprising a lens guide substrate and a seal substrate, wherein the seal substrate is bonded to the second substrate, sealing the lens.