Atmospheric gas detection using broadband mid-IR thulium fiber-based sources

Pankaj Kadwani; Robert A. Sims; Jeffrey Chia; Falah Altal; Lawrence Shah; Martin C. Richardson

doi:10.1117/12.887020

25 May 2011 Atmospheric gas detection using broadband mid-IR thulium fiber-based sources

Pankaj Kadwani, Robert A. Sims, Jeffrey Chia, Falah Altal, Lawrence Shah, Martin C. Richardson

Proceedings Volume 8039, Laser Technology for Defense and Security VII; 80390L (2011) https://doi.org/10.1117/12.887020
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

We present a Tm:fiber based broadband ASE source which was used for atmospheric CO₂ detection. The average spectral power of this source was limited to ~6.1 μW/nm which was the main limitation in detection of trace concentrations of gases. This shortcoming was overcome by using an ultrashort pulsed Raman amplifier system with maximum of ~127 μW/nm of spectral power density which was able to provide sensitivity better than 300 ppm for CO₂. In addition, improving the average power of the ASE provided an essential tool in lab to characterize optical elements with sharp spectral features around 2 μm.

Citation Download Citation

Pankaj Kadwani, Robert A. Sims, Jeffrey Chia, Falah Altal, Lawrence Shah, and Martin C. Richardson "Atmospheric gas detection using broadband mid-IR thulium fiber-based sources", Proc. SPIE 8039, Laser Technology for Defense and Security VII, 80390L (25 May 2011); https://doi.org/10.1117/12.887020

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