M. Nedeljkovic, A. Khokhar, G. Mashanovich, A. V. Velasco, P. Cheben
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Silicon-on-insulator spatial heterodyne spectrometer chip for the mid-infrared
We demonstrate fur the first linio a silicon-on-insulator spatial hoterodyne waveguide spectrometer chip operating in i ho mid-infrared. The device comprises a MMI splitting tree, followed by an array of 42 Mach-Zehnder interferometers with linearly increasing optical path differences. The fabricated device was characterized in the 3717-3772 nm wavelength range by retrieving the spectral line of a quantum cascade laser line, with a wavelength resolution of 2.8 nm.
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