Multiaperture fourier transform arrayed waveguide spectrometer

We present a new Fourier transform waveguide spectrometer concept based on Mach-Zehnder interferometer arrays. Multiaperture input provides a markedly increased optical throughput. Unlike conventional FT spectrometers, the device has no moving parts. Phase and amplitude errors can be readily measured in this device and numerically corrected with no need for costly modifications of the waveguide physical properties. An example of the spectrometer designed for the silicon-on-insulator platform with sub-nanometer resolution is discussed.