Optical module package

An optical system comprising:

• an optical source;
• an optical receiver;
• and
• an optical module package optically connecting the optical source to the optical receiver, the optical module package comprising
• a housing;
• a plurality of optical fiber connectors including a first connector connected to the optical source, and a second connector connected to the optical receiver;
• and
• a plurality of optical fiber cables, each of the optical fiber cables connecting the housing and a corresponding optical fiber connector, said each of the optical fiber cables comprising
• an optical fiber rigidly connected to the housing and to the corresponding optical fiber connector,
• a flexible outer protective tube enclosing the optical fiber, and
• a flexible outer protective tube enclosing the inner protective tube, wherein the inner protective tube and the outer protective tube arc longitudinally movable relative to the optical fiber along at least a part of the optical fiber enclosed by the inner protective tube and the outer protective tube in response to environmental temperature changes, to reduce a strain on the optical fiber caused by thermal expansion or contraction of the inner protective tube and the outer protective tube.