Patent ID: 7106980

Claim:
An optical receiver comprising: (a) a substrate; (b) a back-illuminated photodiode (PD) placed on the substrate and is provided with a p-electrode being wire-bonded; (c) a light-transmitting medium that: (c1) is placed on the substrate; and (c2) receives light, having multiplexed wavelengths, from outside; (d) a wavelength-selecting filter that: (d1) is attached directly at the end face of the light-transmitting medium in such a way that the filter is slanted at an angle of 4 to 12 degrees to the plane perpendicular to the optical axis; (d2) selects light having a specified wavelength out of light emerging from the light-transmitting medium; and (d3) transmits the selected light to the PD to enable the PD to detect it; and (e) an optical pathway-changing grove that is formed on the substrate and that has a reflecting face for reflecting light having passed through the wavelength-selecting filter into the PD, the PD being placed on the substrate so as to be positioned directly above the reflecting face.