Patent ID: 10180583

Abstract:
An optical coupling module reduces a number of optical elements, and includes a collimate lens 2a that collimates a light from the first semiconductor laser 1a and then outputs the first collimate light, a collimate lens 2b that collimates a light from the semiconductor laser 1b in a location at which an emission plane is approximately orthogonal to an emission plane of the semiconductor laser 1a and outputs the second collimate light. The collimate lens 2c collimates light from semiconductor laser 1c in-place in the location at which the emission plane faces the emission plane of the semiconductor laser 1b and outputs a third collimate light. A prism mirror 3 has a rectangular prism with a first reflection plane that reflects the second collimate light to a parallel direction to the first collimate light and a second reflection plane orthogonal to the first reflection plane and reflects the third collimate light to the parallel direction to the first collimate light.