Wavelength multiplexing optimizes gas sensors

Researchers at Leti have come up with an innovative integrated wavelength multiplexer design that will speed the development process for single- and multiple-gas sensors, resulting in competitively-priced and energy-efficient products offering high performance. The key? The sensors’ lasers produce only those wavelengths needed to detect the gases targeted.
The design was originally intended for a sensor that could distinguish between and measure three greenhouse gases simultaneously.
The multiplexer, which is comprised of a network of 200 to 250 optical guides, boasts special optics that make it both more sensitive and selective. And transfer from one optical guide to another is reduced for a more homogeneous output wavelength. The research is being conducted with the III-V Lab, which is providing the laser arrays for the device.
 

Contact: pierre.labeye@cea.fr

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