Design of a silica based AWG for visible light (lambda=670nm) applications

The suitability of silica based planar lightwave circuits, most commonly used for passive optical components in the telecom wavelength region 1.3¥ìm to 1.6¥ìm, is evaluated here for shorter wavelengths into the VIS range. Wavelength dependent scattering losses and minimum bending radii for different index differences .n are investigated. Exemplarily, a six channel AWG design around 670nm wavelength is presented.