IR spectroscopic technologies for gas sensing

Pentti Karioja, Matteo Cherchi, Mikko Harjanne, Jukka Viheriälä, Mircea Guina, Ryszard Buczynski, Rafał Kasztelanic, Tomi Salo, Sami Virtanen, Pawel Kluczynski, Lars Borgen, Przemyslaw Kalinowski

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific


Cost effective multi-wavelength light sources are key enablers for spectroscopic applications at Mid-IR wavelength range. Use of interference filters is the most conventional method for selecting IR absorption bands for gas sensing. Currently, MEMS based tuneable filters are also available for required Mid-IR wavelengths. Integrated optics based filters are the most advanced method for spectral filtering. We introduce a novel Mid-IR light source concept that is utilizing a novel Si-photonics based Photonic Integrated Circuit (PIC) filter and wide-band Mid-IR SLEDs. The spectral bands are switchable and tunable and they can be modulated. The source allows for the fabrication of an affordable multi-band gas sensor with good selectivity and sensitivity. The unit price can be lowered in high volumes by utilizing tailored molded IR lens technology and automated packaging and assembling technologies.
Original languageEnglish
Title of host publicationInternational Conference on New Trends in Contemporary Optics
Subtitle of host publicationSeptember 23rd - 26th, 2019, Vinh City, Vietnam
Number of pages1
Publication statusPublished - Sep 2019
MoE publication typeNot Eligible
EventInternational Conference on New Tends in Contemporary Optics - Vinh City, Viet Nam
Duration: 23 Sep 201926 Sep 2019


ConferenceInternational Conference on New Tends in Contemporary Optics
CountryViet Nam
CityVinh City


  • SLED
  • Si photonics
  • Mid-IR integrated optics
  • PIC
  • Mid-IR lens
  • photonics packaging
  • gas sensing
  • OtaNano

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