Patent ID: 7756181

Claim:
An optical transmission/reception device comprising: a plurality of semiconductor laser chips, each of the plurality of semiconductor laser chips capable of emitting a light beam having a specific wavelength, the wavelength of the light beam emitted from each of the plurality of semiconductor laser chips being different from one another, each of the plurality of semiconductor laser chips operating independently from one another; and a plurality of light receiving elements, each of the plurality of light receiving elements receiving a light beam of specific wavelength as that corresponding to one of the plurality of semiconductor laser chips, the plurality of semiconductor laser chips configured such that a wide band signal is split into a plurality of signals and simultaneously transmitted by the semiconductor laser chips, wherein the plurality of semiconductor laser chips include: a cap encapsulating the plurality of semiconductor laser chips, the cap having a cap glass to pass light emitted from the plurality of semiconductor laser chips; and a molded resin having a light diffusion capability, wherein the cap encapsulating the plurality of semiconductor laser chips is covered with the molded resin, wherein the plurality of semiconductor laser chips are configured to emit light only having wavelengths of 900 nm, 1.1 μm and 1.4 μm.