摘要 |
A thenno-optic lens (150) of the present invention includes a plurality of parallel heating elements (2101-210n) having substantially constant center-to-center spacing and respective dimensions varying from the outermost heating elements to the innermost heating elements, and at least two conductive elements (2201, 2202) for providing a potential across the heating elements. The dimensions of the heating elements are varied such that a parabolic temperature distribution is generated within the thermo-optic lens. A dispersion compensator (100) of the present invention includes a first and a second waveguide grating (1101, 1102), each of the waveguide gratings having a first star coupler (1301, 1322), an array of waveguides (1201-120n, 1221-122n) of increasing path lengths, a first end of each of the waveguides of the array of waveguides optically coupled to the first star coupler, and a second star coupler (1302, 1322), a second end of each of the waveguides of the array of waveguides optically coupled to the second star coupler. The dispersion compensator further includes a lens (150) having a parabolic refractive index distribution, the lens optically coupling the second star coupler of the first waveguide grating and the second star coupler of the second waveguide grating. |