Temperature compliant tube for fiber optic components.

摘要

A temperature-compliant tube (22) for fiber optic components is inserted into the exit port (20) of an hermetically sealed package and extends into the interior of the package (10). An optical fiber (18) extends through the temperature-compliant tube and is attached to a substrate (14) interior of the package for coupling to an optical component (16) mounted on the substrate. The optical fiber is hermetically sealed (28) to the interior end of the temperature-compliant tube. The thermal coefficients of expansion (a2,a1,a3) and lengths (l2,l1,l3) for the temperature-compliant tube, the optical fiber between the substrate and the interior end of the tube, and the package body between the substrate and the exterior end of the exit port are tailored to provide zero differential expansion (a1l1+a2l2=a3l3) to enable the fiber optic components to be cycled over a wide temperature range without misalignment of the fiber relative to the optical component or mechanical failure of the fiber.