Patent ID: 8714838

Claim:
An optical subassembly for passive alignment, comprising: a substrate; an alignment reference device having a plurality of first alignment reference coupling elements and being assembled on the substrate; an optical element placed on the substrate and aligned with the plurality of first alignment reference coupling elements; a first lens device including a first lens and a plurality of first corresponding alignment coupling elements that are positioned on a straight line with the first lens and being assembled on the alignment reference device by coupling the plurality of first alignment coupling elements with the plurality of first corresponding alignment reference coupling elements such that the first lens is aligned with the optical element, wherein the first lens parallelizes light emitted from the optical element; a second lens device including a second lens and a plurality of second alignment coupling elements that are positioned on a straight line with the second lens, wherein the second lens collects the light from the first lens; and a receptacle having a ferrule alignment hole penetrating the receptacle, wherein a side of the receptacle is assembled on the second lens device by coupling the plurality of second alignment coupling elements with a plurality of second corresponding alignment reference coupling elements formed in the receptacle such that the ferrule alignment hole is aligned with the second lens and the receptacle is assembled on the alignment reference device such that the second lens is aligned with the first lens, and wherein the ferrule alignment hole extends to a connector insertion hole formed on an opposite side of the receptacle and the connector insertion hole secures an external optical connector, and wherein the optical element, the first lens device, the second lens device and the receptacle are passively aligned with respect to the plurality of first alignment reference coupling elements.