Tampere University of Technology

TUTCRIS Research Portal

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

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


Original languageEnglish
Title of host publicationNext-Generation Spectroscopic Technologies XI
PublisherSPIE, IEEE
ISBN (Electronic)9781510618251
Publication statusPublished - 2018
Publication typeA4 Article in a conference publication
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
CountryUnited States


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.


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

Publication forum classification

Field of science, Statistics Finland