Patent ID: 7463797
Filing Date: 2008-12-09
Classification: G02B,H04B,H04J

Abstract:
1. A wavelength multiplexed light source, comprising: an input unit having an N number of input ends to which an N number of incident lights (N is an integer greater than or equal to two) of different wavelengths are input, and the N number of output ends from which the incident lights are respectively output; the N number of input waveguides which are respectively connected to the N number of output ends of the input unit and individually guide the N number of incident lights; a multimode waveguide for 1×N couplings having an input edge of a width W on one side thereof, with the N number of input waveguides being respectively connected to the input edge so that each of the incident lights is input to the input edge to be coupled at a predetermined position on an output edge on the other side opposite to the input edge; and an output waveguide which is connected to the predetermined position on the output edge of the multimode waveguide for 1×N couplings, wherein input positions where the N number of incident lights are input to the multimode waveguide for 1×N couplings are set so that, for two of the incident lights having adjacent wavelengths, the distance from the central position of the input edge of the multimode waveguide for 1×N couplings to the input position for the incident light having a longer wavelength is equal to or more than that for the incident light having a shorter wavelength.