Accueil > RECHERCHE > Matériaux et optique > Equipe OML > Activités de recherche > Axis 1 : Matériaux Instrumentation Laser (MIL)

Mid-IR source and energy conversion processes for all-optical IR sensors

par BRAUD Alain - publié le

Fundings : OPTIGAS (ANR 2016-2020 – coordination) DEMETO (Maturation 2018-2020 – coordination), TOUTOPTIK (BPIFrance, 2015-2017 – coordination) COPTIK (ADEME, 2014-2017 - partner)

PhD and Post-doc involved : F. Starecki, I. Afienne, A.L. Pelé
Collaborations : ISCR Rennes, IDIL Lannion, BRGM

We develop prototypes for all-optical gas detection using rare earth doped chalcogenide fibers in collaboration with the ISCR of Rennes. These detectors have the advantage of allowing in-situ and real-time analysis of the gas concentration. The use of an original concept of frequency conversion from infrared to visible allows the use of commercial optical fibers to transport the detection signal. This detector thus allows remote sensing over long distances between the gas detection zone and the data analysis zone. A first project funded by ADEME made it possible to build an efficient prototype for detecting CO2. The ANR OPTIGAS and the DEMETO maturation project, both coordinated by MIL, aim to develop this same type of detection for dangerous gases around 8 µm and for methane respectively. The scientific achievement described below gives details about the all-optical sensing concept.