Patent ID: 8768123
Filing Date: 2014-07-01
Classification: G02B

Abstract:
1. A multi-chip module (MCM), comprising a first substrate having a first surface and a second surface, wherein the first substrate includes an opening that extends through the first substrate, wherein the opening is defined by an edge in the first surface, an edge in the second surface, and a side wall, and wherein, disposed on the first surface, the first substrate includes: a first optical waveguide; a first optical coupler, optically coupled to the first optical waveguide, configured to redirect an optical signal from the first optical waveguide to a first direction, or from the first direction to the first optical waveguide, wherein the first direction is other than in the plane of the first surface; a second optical coupler, optically coupled to the first optical waveguide, configured to redirect the optical signal from the first optical waveguide to a second direction, or from the second direction to the first optical waveguide, wherein the second direction is other than in the plane of the first surface; wherein an optical path associated with the second direction passes through the opening; and a second substrate having a third surface, which faces the first surface, wherein, disposed on the third surface, the second substrate includes: wherein there are negative features disposed on at least one of the first surface and the third surface; and wherein the MCM further includes positive features that are configured to mechanically couple the first substrate and the second substrate by mating with the negative features.