Patent ID: 8215850

Claim:
An optical module comprising: an optical component for generating optical signals; a housing for enclosing the optical component, the housing having a section with a first coefficient of thermal expansion (CTE) and including an opening extending through an outer wall thereof; a ceramic ferrule, extending through the opening in the section of the housing with a gap therebetween, having a second CTE less than the first CTE, and including a longitudinally extending passage with an inside diameter (ID); a glass solder, filling the gap between the ferrule and the section of the housing, and being under compression by the section of the housing due to the difference in the first and second CTE forming a hermetic seal therebetween; an optical fiber, extending through the ferrule into alignment with the optical component, having an outside diameter up to 50 μm less than the inside diameter of the longitudinally extending passage; and an adhesive hermetically sealing the optical fiber in the longitudinally extending passage.