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The iCspec project aims to develop compact, robust, maintenance-free sensors for oil
refinery process control to optimize the refinery processes and reduce related pollution.

Publié le 5 mai 2021

In-line Cascade laser spectrometer for process control

The iCspec project aims to develop compact, robust, maintenance-free sensors for oil refinery process control to optimize the refinery processes and reduce related pollution.


Starting date : Apr. 2015 - Mar. 2018

Lifetime: 36 months

Program in support : H2020 SPIRE-01-2014 - Integrated Process Control


Status project : complete

CEA-Leti's contact :

Pierre Labeye

Laurent Fulbert


Project Coordinator: Siemens (GE)


  • FR: CEA-Leti, III-V Lab, Mirsense
  • GE: Julius-Maximilians Universitaet Wurzburg, Nanoplus Nanosystems and Technologies Gmbh
  • PL: Airoptic Spolza Z Ograniczonaodpowiedzianoscia, Politechnika Wroclawska
  • SE: Preem Aktiebolag

Target market: n/a


  • «Integrated TDLS-Gassensors - from NIR to MIR»,
    A. Popescu, 6th Gassensor-Workshop, 9 Sept. 2015,
    Freiburg, Germany.

  • «Trace gas sensing - challenges and opportunities of an
    emerging application area for novel semiconductor lasers”,
    A. Forchel, 21st International Conference on Electronic
    Properties of Two-Dimensional Systems (EP2DS-21),
    26-31 July 2015, Sendai, Japan.

  • «Mid-Infrared (~2.8 um to ~7.1 um) Interband Cascade
    Lasers”, S. Höfling, R. Weih, M. Dallner, J. Scheuermann,
    L. Naehle, M. Fischer, J. Koeth, M. Kamp, SPIE Optics +
    Photonics, 9 – 13 Auguts 2015, San Diego, USA.

  • «Multiplexing photonic devices integrated on a silicon/
    germanium platform for the mid-infrared”, P. Labeye,
    A. Koshkinbayeva, P. Barritault, O. Lartigue, M. Fournier,
    J.-M. Fedeli, S. Garcia., S. Nicoletti, L. Duraffourg,
    SPIE Photonics West, 28 Jan. - 2 Feb. 2017,
    San Francisco, USA.

Investment:  € 5.5 m.

EC Contribution€ 5.5 m.



  • CEA-Leti has designed and built integrated beam combiners for three different wavelength domains based on the specifications agreed between the project partners.

  • One beam combiner is dedicated to a monitoring system working at nine specific wavelengths around 3.4 μm, one is dedicated to a continuous spectral domain around 6.8 μm and the more prospective third is dedicated to a large spectral domain around 9 μm.

  • CEA-Leti has also built, tested and delivered an ASIC capable of driving the QCL array and is now producing a modified version of this ASIC for the ICL array.


  • Real-time measurements of multi-components in process streams respond to long demanded industry requirements for fast, accurate, reliable and cheap process analyzers. Growth of these currently unavailable systems will lead to a paradigm change throughout the process control and production chain. The iCspec project is focusing on developing compact,
    robust, maintenance-free sensors for fast, in-line, multi-species measurement of chemical composition for process analytics involving multiple technically relevant gases including hydrocarbons. The projected sensors will replace expensive, polluting, state-of-the-art systems. Established laser-based, in-line gas sensing is being extended to the mid-infrared “chemical fingerprint” spectral range for multi-species detection.

  • Project developments are based on two key operations: (1) Integration of mid-IR laser arrays and, (2) Advancement of spectroscopic and chemometric data evaluation. Demonstrators are integrated into the control loop at a petro-chemical plant allowing significant improvements including optimized product quality, minimized waste, reduced environmental pollution and greater safety in cases, in which hazardous conditions need to be immediately detected.


  • AirOptic now commercializes a monitoring system based on the iCspec results.