Multiaperture planar waveguide spectrometer formed by arrayed Mach-Zehnder interferometers Academic Article uri icon

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abstract

  • Concept, theory and simulations of a new type of waveguide device, a multiaperture Fourier-transform planar waveguide spectrometer, are presented. The spectrometer is formed by an array of Mach-Zehnder interferometers generating a wavelength dependent spatial fringe pattern at the array output. The input light spectrum is calculated using a discrete Fourier transformation of the output spatial fringes. The multiaperture input significantly increases the optical throughput (├ętendue) compared to conventional single input spectrometers. Design rules for the arrayed spectrometer are deduced from performance specifications such as wavelength range and spectral resolution. A design example with spectral resolution 0.025 nm and range 2.5 nm is presented, where the optical throughput is increased by a factor of 200 compared to a single input device.

authors

  • Florjanczyk, Miroslaw
  • Cheben, Pavel
  • Janz, Siegfried
  • Scott, Alan
  • Solheim, Brian
  • Xu, Dan-Xia

publication date

  • 2007