We designed and fabricated an arrayed-waveguide grating (AWG) in silicon oxynitride as a spectrometer for spectral domain optical coherence tomography (SD-OCT). The AWG has a footprint of only , operates at a center wavelength of , and has free spectral range. OCT measurements are performed that demonstrate imaging up to a maximum depth of with an axial resolution of , both in agreement with the AWG design parameters. Using the AWG spectrometer combined with a fiber-based SD-OCT system, we demonstrate cross- sectional OCT imaging of a multilayered scattering phantom.
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