We report the development of a platform, based-on a Field-Programmable Gate Arrays (FPGAs) and suitable for Time-Division-Multiplexed DFB lasers. The designed platform is subsequently combined with a spectroscopy setup, for detection and quantification of species in a gas mixture. The experimental results show a detection limit of 460 ppm, an uncertainty of 0.1% and a computation time of less than 1000 clock cycles. The proposed system offers a high level of flexibility and is applicable to arbitrary types of gas-mixtures.
Fatemeh Yazdandoust, Hervé Tatenguem Fankem, Tobias Milde, Alvaro Jimenez, and Joachim Sacher, "A real-time multi-gases detection and concentration measurements based-on time-division multiplexed-lasers," Proc. SPIE 10517, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications III, 105170N (Presented at SPIE LASE: January 30, 2018; Published: 15 February 2018); https://doi.org/10.1117/12.2287416.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon