Patent ID: 7657140

Claim:
An optical cable module comprising: an optical waveguide formed by surrounding a core with a clad layer and a light-receiving/emitting element, installed on a supporting substrate, wherein the optical waveguide is formed into a film shape having flexibility, and has an optical path conversion mirror that converts a direction of an optical path of an optical signal to be transmitted through the core, the optical waveguide has a tip portion that is placed so as to protrude in an optical axis direction from an end of a supporting face that supports the optical waveguide on the supporting substrate, a light-releasing face of the optical waveguide or a light-incident face of the optical waveguide is aligned so as to face a light-receiving face or a light-emitting face of the light-receiving/emitting element, and wherein, on the supporting substrate, an amount of protrusion of the optical waveguide from the end of the supporting face supporting the optical waveguide to the center of the optical path conversion mirror in the core is represented by L(m), a load of the optical waveguide per unit length is represented by w(N/m), a cross-section secondary moment of the optical waveguide is represented by Iz(m 4 ), a longitudinal elastic modulus of the optical waveguide is represented by E(Pa), and the amount of protrusion L of the optical waveguide satisfies the following relationship: 1.0≧( wL 3 /6 Eiz )·(180/π).