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Mid-Infrared Silicon-on-Insulator Fourier-Transform Spectrometer Chip

AutorNedeljkovic, Milos; Velasco, Aitor V. ; Khokhar, Ali Z.; Delage, A.; Cheben, Pavell; Mashanovich, Goran Z.
Palabras claveSilicon photonics
Spectroscopy
Infrared
Fecha de publicación2-nov-2015
EditorInstitute of Electrical and Electronics Engineers
CitaciónIEEE Photonics Technology Letters 28:4 (2016)
ResumenMid-infrared absorption spectroscopy is highly relevant for a wide range of sensing applications. In this letter, we demonstrate a Fourier-transform spectrometer chip based on the principle of spatial heterodyning implemented in the silicon-on-insulator waveguide platform, and operating near 3.75-μm wavelength. The spectrometer comprises a waveguide splitting tree feeding to an array of 42 Mach-Zehnder interferometers with linearly increasing optical path length differences. A spectral retrieval algorithm based on calibration matrices is applied to the stationary output pattern of the array, compensating for any phase and amplitude errors arising from fabrication imperfections. A spectral resolution below 3 nm is experimentally demonstrated.
Descripción4 pags., 4 figs.
Versión del editorhttp://doi.org/10.1109/LPT.2015.2496729
URIhttp://hdl.handle.net/10261/167745
DOI10.1109/LPT.2015.2496729
ISSN1041-1135
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