Share Email Print
cover

Proceedings Paper • new

Mid-infrared integrated wideband duel-polarization Fourier-transform spectrometer
Author(s): Qiankun Liu; Joan Manel Ramirez; Vladyslav Vakarin; Xavier Le Roux; Carlos Alonso-Ramos; Jacopo Frigerio; Andrea Ballabio; Enrico Talamas Simola; David Bouville; Laurent Vivien; Giovanni Isella; Delphine Marris-Morini
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Due to their unique vibrational/rotational frequencies in the mid infrared (MIR) fingerprint region, which scans from 500 to 1500 cm-1, molecules can be assuredly identified and quantified. Thus, integrated on-chip mid infrared spectroscopic systems, with low power consumption and high performance, would show great value for numerous applications, such as medical diagnosis, astronomy, chemical and biological sensing or security. Different solutions can be envisioned, such as Fourier-Transform spectrometers, echelle gratings, or arrayed waveguide gratings (AWG). The integrated spatial heterodyne Fourier-Transform spectrometer (SHFTS) shows relaxed fabrication tolerances while applying a phase and amplitude correction algorithm. Meanwhile, it provides high optical throughput and high spectral resolution compared with AWG or echelle gratings. However, up to now in the literature, most of the reported integrated Fourier-Transform based spectrometer is based on silicon-on-insulator operating in the near infrared typically at 1.55 μm wavelength. Thereby the development of integrated Fourier-Transform spectrometers operating in the MIR covering the wide fingerprint region is highly desirable. In this work, we experimentally demonstrate the first duel polarization SHFTS operating in the mid infrared beyond 5 μm wavelength. The fabricated FTS, which is based on the graded-index Ge-rich SiGe platform, contains 19 Mach-Zehnder interferometers with a linearly increasing path difference. A spectral resolution better than 15 cm-1 has been demonstrated within an unprecedented spectral range of 800 cm-1 (from 5 to 8.5 μm wavelength).

Paper Details

Date Published: 4 March 2019
PDF: 6 pages
Proc. SPIE 10921, Integrated Optics: Devices, Materials, and Technologies XXIII, 109210Z (4 March 2019); doi: 10.1117/12.2510728
Show Author Affiliations
Qiankun Liu, Ctr. de Nanosciences et de Nanotechnologies, CNRS, Univ. Paris-Sud, Univ. Paris-Saclay (France)
Joan Manel Ramirez, Ctr. de Nanosciences et de Nanotechnologies, CNRS, Univ. Paris-Sud, Univ. Paris-Saclay (France)
Vladyslav Vakarin, Ctr. de Nanosciences et de Nanotechnologies, CNRS, Univ. Paris-Sud, Univ. Paris-Saclay (France)
Xavier Le Roux, Ctr. de Nanosciences et de Nanotechnologies, CNRS, Univ. Paris-Sud, Univ. Paris-Saclay (France)
Carlos Alonso-Ramos, Ctr. de Nanosciences et de Nanotechnologies, CNRS, Univ. Paris-Sud, Univ. Paris-Saclay (France)
Jacopo Frigerio, Politecnico di Milano (Italy)
Andrea Ballabio, Politecnico di Milano (Italy)
Enrico Talamas Simola, Politecnico di Milano (Italy)
David Bouville, Ctr. de Nanosciences et de Nanotechnologies, CNRS, Univ. Paris-Sud, Univ. Paris-Saclay (France)
Laurent Vivien, Ctr. de Nanosciences et de Nanotechnologies, CNRS, Univ. Paris-Sud, Univ. Paris-Saclay (France)
Giovanni Isella, Politecnico di Milano (Italy)
Delphine Marris-Morini, Ctr. de Nanosciences et de Nanotechnologies, CNRS, Univ. Paris-Sud, Univ. Paris-Saclay (France)


Published in SPIE Proceedings Vol. 10921:
Integrated Optics: Devices, Materials, and Technologies XXIII
Sonia M. García-Blanco; Pavel Cheben, Editor(s)

© SPIE. Terms of Use
Back to Top