Presentation + Paper
14 May 2018 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 Buczyński, Rafał Kasztelanic, Tomi Salo, Sami Virtanen, Paweł Kluczyński, Lars Borgen, Marcin Ratajczyk, Przemyslaw Kalinowski
Author Affiliations +
Abstract
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 2.7…3.5 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.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Pentti Karioja, Teemu Alajoki, Matteo Cherchi, Jyrki Ollila, Mikko Harjanne, Noora Heinilehto, Soile Suomalainen, Nouman Zia, Heidi Tuorila, Jukka Viheriälä, Mircea Guina, Ryszard Buczyński, Rafał Kasztelanic, Tomi Salo, Sami Virtanen, Paweł Kluczyński, Lars Borgen, Marcin Ratajczyk, and Przemyslaw Kalinowski "Integrated multi-wavelength mid-IR light source for gas sensing", Proc. SPIE 10657, Next-Generation Spectroscopic Technologies XI, 106570A (14 May 2018); https://doi.org/10.1117/12.2305712
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CITATIONS
Cited by 2 scholarly publications.
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KEYWORDS
Mid-IR

Light sources

Photonic integrated circuits

Gas sensors

Glasses

Optical filters

Absorption

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