Journal
OPTICS EXPRESS
Volume 24, Issue 9, Pages 9465-9472Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.24.009465
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A compact (1.2 mm(2)) fully integrated mid-IR spectrometer operating in the 3 mu m wavelength range is presented. To our knowledge this is the longest wavelength integrated spectrometer operating in the important wavelength window for spectroscopy of organic compounds. The spectrometer is based on a silicon-on-insulator arrayed waveguide grating filter. An array of InAs0.91Sb0.09 p-i-n photodiodes is heterogeneously integrated on the spectrometers output grating couplers using adhesive bonding. The spectrometer insertion loss is less than 3 dB and the waveguide-referred responsivity of the integrated photodiodes at room temperature is 0.3 A/W. (C) 2016 Optical Society of America
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