Mid-infrared integrated wideband duel-polarization Fourier-transform spectrometer

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

doi:10.1117/12.2510728

4 March 2019 Mid-infrared integrated wideband duel-polarization Fourier-transform spectrometer

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

Author Affiliations +

Proceedings Volume 10921, Integrated Optics: Devices, Materials, and Technologies XXIII; 109210Z (2019) https://doi.org/10.1117/12.2510728
Event: SPIE OPTO, 2019, San Francisco, California, United States

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).

Conference Presentation

Citation Download Citation

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, and Delphine Marris-Morini "Mid-infrared integrated wideband duel-polarization Fourier-transform spectrometer", Proc. SPIE 10921, Integrated Optics: Devices, Materials, and Technologies XXIII, 109210Z (4 March 2019); https://doi.org/10.1117/12.2510728

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available