Patent ID: 6377723
Filing Date: 2002-04-23
Classification: G02B

Abstract:
An optical waveguide circuit, in which a first slab waveguide is connected to the emitting side of one of more optical waveguides juxtaposed to each other, an array waveguide, consisting of a plurality of waveguides whose lengths are different from each other, which propagates lights led out from said first slab waveguide is connected to the emitting side of said first slab waveguide, a second slab waveguide is connected to the emitting side of said array waveguide, a waveguide construction, consisting of a plurality of optical output waveguides juxtaposed to each other, is formed on a substrate at the emitting side of said second slab waveguide, having an optical dividing feature for dividing lights of a plurality of wavelengths from lights having a plurality of wavelengths different from each other, which are inputted from said optical input waveguides, and outputting the same from respective optical output waveguides, light transmission features of the respective lights outputted from the respective corresponding optical output waveguides having the center wavelengths of light transmission different from each other in at least a predetermined wavelength area, and compensating a temperature dependency fluctuation of the center wavelengths of the light transmission; wherein by providing said array waveguide or said array waveguide and the first and second slab waveguides with a stress applying means for applying a stress dependent on a temperature in the direction of reducing the temperature dependency fluctuation of the center wavelengths of said respective light transmissions, the temperature dependency fluctuation of the center wavelengths of said respective light transmissions is reduced.