Patent ID: 6826334
Filing Date: 2004-11-30
Classification: G02B

Abstract:
A wavelength compensation method in an arrayed waveguide grating module comprising:a monitor light inputting step of inputting a monitor light for check from either one of the input waveguides with respect to an arrayed waveguide grating module with an arrayed waveguide grating including one or more input waveguides, an input side slab-waveguide connected to the output side of the input waveguide or waveguides, a plurality of arrayed waveguides formed on the side of the input side slab-waveguide opposite the input waveguide or waveguides, an output side slab-waveguide connected to the other terminal of the arrayed waveguides, a plurality of first output waveguides connected to the output side slab-waveguide on the side thereof opposite the arrayed waveguides and at least one second output waveguide formed together with the first output waveguides on the side of the output side slab-waveguide opposite the arrayed waveguides, the afore-said components being all formed on a substrate and the optical spectrum outputted from the second output waveguide being different from the optical spectra outputted from the other output waveguides; and a wavelength compensation step of performing wavelength compensation with respect to the lights outputted from the first waveguides at the time of the light input from the input waveguides by detecting the monitor light outputted from the second output waveguide on the basis of the monitor light inputting step.