Patent ID: 7182528
Filing Date: 2007-02-27
Classification: G02B

Abstract:
1. An optical communication module, comprising: a semiconductor laser; a coupling optical system for coupling a first light flux with a wavelength of λ first and second light-receiving elements for receiving at least second and third light fluxes emitted from an end surface of the optical fiber, the second and third light fluxes each having wavelengths of λ wherein each of the wavelengths λ wherein the coupling optical system is arranged between the semiconductor laser and the first and second light-receiving elements on a first end of the optical communication module and the optical fiber on a second end of the optical communication module, wherein the coupling optical system includes a diffractive structure on at least one surface of the coupling optical system, and wherein the coupling optical system changes paths of the first, second, and third light fluxes into different directions, the first light flux entering into the optical fiber, and the second and third light fluxes entering into the first and second light-receiving elements, respectively.