Advanced Concepts in Waveguide Spectrometers

We present several new concepts to extend the capabilities of arrayed waveguide grating spectrometers. Strong lateral mode confinement waveguide structure in the focal plane is used to increase resolution., a Michelson-type AWG spectrometer can improve optical throughput or étendue and we show that AWG dispersion can be magnified many times by modifying the waveguide group index.