WAVELENGTH SENSITIVE TAPERED COUPLER WITH ANTI-RESONANT WAVE-GUIDES

We describe a coupler that consists of two phase-mismatched polymer wa veguides coupled together by a tapered AlAs/AlGaAs vertical cavity str ucture. At any particular wavelength, the light is transferred from on e polymer waveguide to the other via the semiconductor cavity at a uni que position along the waveguide. Thus, the length of the device deter mines the range of wavelengths transferred. In addition to a wavelengt h router, the structure could be useful for wavelength selective ampli fiers or multiwavelength lasers. The concept is demonstrated in a pass ive structure with a resolution of about 1 nm.