Wavelength multiplexed light source and wavelength multiplexed light source system
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorHidenobu Hamada
Life of this patent
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Abstract
A wavelength multiplexed light source using multimode interference is provided. The light source includes an input unit for inputting a plurality of incident lights, input waveguides for individually guiding the incident lights, a multimode waveguide having an input edge connected to the input waveguides so that each incident light is coupled at a predetermined position on an output edge opposite to the input edge and an output waveguide connected to the predetermined position. Two incident lights having adjacent wavelengths are arranged relative to a central position of the input edge based on a respective wavelength for the incident light.
Claims13
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.
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 an 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 a smaller distance of two distances from the input position through which the incident light is input to the multimode waveguide for 1×N couplings to one of the positions separated from the central position of the input edge by ¼W on both sides of the central position, for two of the incident lights having adjacent wavelengths, the smaller distance from each of the input positions to one of the positions on both sides of the central position are equal to each other, or the smaller distance for the light having a longer wavelength is smaller than the other.
A wavelength multiplexed light source comprising:
- an input unit configured to receive an N(N is an integer greater than or equal to two) number of incident lights of respectively different wavelengths;
- and
- a multimode waveguide coupled to the input unit and configured to receive the N number of incident lights from the input unit,
- wherein the input unit includes a controller configured to rearrange an order of the incident lights relative to respective positions along an input edge of the multimode waveguide, based on a length of respective wavelengths of the incident lights.
Dependencies are inferred from the claim text.