Abstract: An optical module 100 comprises a substrate 110 at which V-shaped groove 110a and 110b are formed through etching to extend along directions perpendicular to each other and a cube-type wavelength division multiplexer 150 that allows light to be transmitted or reflected on a 90° angle depending upon the wavelength of the light, lens elements 140a and 140b constituted of silicon, a light emitting element 120 that emits light to be directed to the outside via a lens element and the wavelength division multiplexer and a light receiving element 130 that receives incoming light from the outside via the wavelength division multiplexer and a lens element, all disposed on the substrate. The components, which contribute to miniaturization of the module, can be mounted all together on a single substrate and thus, the mass productivity is greatly improved and the module can be offered at a more affordable price.

Abstract: An optical module 100 comprises a substrate 110 at which V-shaped groove 110a and 110b are formed through etching to extend along directions perpendicular to each other and a cube-type wavelength division multiplexer 150 that allows light to be transmitted or reflected on a 90° angle depending upon the wavelength of the light, lens elements 140a and 140b constituted of silicon, a light emitting element 120 that emits light to be directed to the outside via a lens element and the wavelength division multiplexer and a light receiving element 130 that receives incoming light from the outside via the wavelength division multiplexer and a lens element, all disposed on the substrate. The components, which contribute to miniaturization of the module, can be mounted all together on a single substrate and thus, the mass productivity is greatly improved and the module can be offered at a more affordable price.