Patent ID: 9739958
Date: 2017-08-22
CPC Classifications: G02B,H01S

Claim:
1. An optical subassembly comprising: a TSV submount layer carrying an active optical component; and a sandwich cap bonded to the TSV submount layer; wherein: the sandwich cap comprises a bottom spacer layer disposed above the TSV submount layer, a glass layer above the bottom spacer layer and covering the whole layer of the bottom spacer layer, and an upper spacer layer above the glass layer and covering the whole layer of the glass layer; a cavity is defined in the bottom spacer layer and configured for accommodating the active optical component; at least one first lens is formed on the glass layer and is opposite to the active optical component; and an alignment feature configured to receive and precisely align external opto-mechanical parts is formed in the upper spacer layer; wherein the alignment feature is a through opening and is opposite to the cavity of the bottom spacer layer.