14 May 2018 Integrated multi-wavelength mid-IR light source for gas sensing
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, Pentti Karioja, Teemu Alajoki, Teemu Alajoki, Matteo Cherchi, Matteo Cherchi, Jyrki Ollila, Jyrki Ollila, Mikko Harjanne, Mikko Harjanne, Noora Heinilehto, Noora Heinilehto, Soile Suomalainen, Soile Suomalainen, Nouman Zia, Nouman Zia, Heidi Tuorila, Heidi Tuorila, Jukka Viheriälä, Jukka Viheriälä, Mircea Guina, Mircea Guina, Ryszard Buczyński, Ryszard Buczyński, Rafał Kasztelanic, Rafał Kasztelanic, Tomi Salo, Tomi Salo, Sami Virtanen, Sami Virtanen, Paweł Kluczyński, Paweł Kluczyński, Lars Borgen, Lars Borgen, Marcin Ratajczyk, Marcin Ratajczyk, Przemyslaw Kalinowski, Przemyslaw Kalinowski, } "Integrated multi-wavelength mid-IR light source for gas sensing", Proc. SPIE 10657, Next-Generation Spectroscopic Technologies XI, 106570A (14 May 2018); doi: 10.1117/12.2305712; https://doi.org/10.1117/12.2305712
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