Integrated multi-wavelength mid-IR light source for gas sensing

Pentti Karioja, Teemu Alajoki, Matteo Cherchi, Jyrki Ollila, Mikko Harjanne, Noora Heinilehto, Soile Suomalainen, Nouman Zia, Heidi Tuorila, Jukka Viheriälä, Mircea Guina, Ryszard Buczynski, Rafa Kasztelanic, Tomi Salo, Sami Virtanen, Pawel Kluczynski, Lars Borgen, Marcin Ratajczyk, Przemyslaw Kalinowski

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    2 Citations (Scopus)


    Cost effective multi-wavelength light sources are key enablers for spectroscopic applications at Mid-IR wavelength range. Utilizing a novel Mid-IR Si-based photonic integrated circuit filter and wide-band Mid-IR SLEDs, we show the concept of a light source that covers μm wavelength range with a resolution <1nm. 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. The status of the development of the key components of the light source are reported. The Mid-IR PIC is based on the use of thick-SOI technology, SLED is based on AlGaInAsSb materials and the lenses are tailored single crystal, nonoxide glass and heavy metal oxide glasses fabricated by the use of hot-embossing. The packaging concept utilizing automated assembly tools are depicted. In safety and security applications, the Mid-IR wavelength range covered by the source allows for the detection of several harmful gas components with a single sensor. At the moment, affordable sources are not available. The market impact is expected to be disruptive, since the devices currently in the market are either complicated, expensive and heavy instruments, or the applied measurement principles are inadequate in terms of stability and selectivity.

    Original languageEnglish
    Title of host publicationNext-Generation Spectroscopic Technologies XI
    PublisherSPIE, IEEE
    ISBN (Electronic)9781510618251
    Publication statusPublished - 2018
    Publication typeA4 Article in conference proceedings
    EventNext-Generation Spectroscopic Technologies - Orlando, United States
    Duration: 16 Apr 201818 Apr 2018

    Publication series

    NameSPIE Conference Proceedings
    ISSN (Print)0277-786X


    ConferenceNext-Generation Spectroscopic Technologies
    Country/TerritoryUnited States


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

    Publication forum classification

    • Publication forum level 0

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering


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