Patent ID: 7184386

Claim:
An integrated optical head comprising: a light source emitting light; a waveguide guiding the light; an input coupler located at one edge of the waveguide, coupling light emitted from the light source and transmitting the coupled light to the waveguide; an output coupler located at another edge of the waveguide, coupling light emitted from the waveguide and focusing the coupled light on an optical disc; a light path changing unit installed on the waveguide, changing the light path of light that has been reflected by the optical disc and then passed through the output coupler; and an optical detector receiving the light passed through the light path changing unit and converting the received light into an electrical signal in order to detect information from the optical disc wherein the input coupler is an evanescent coupler, which includes an optical fiber that has one end connected to the light source, the other end connected to a surface of the waveguide, and a core closely attached to the surface of the waveguide, and evanescent-couples the light emitted from the light source and transmits the coupled light to the waveguide.