A compact DIAL hygrometer employing paired powerful laser diodes of 0.85-0.9um wavelengths

S. Penchev; V. Pencheva; S. Naboko

doi:10.1117/12.2262567

5 January 2017 A compact DIAL hygrometer employing paired powerful laser diodes of 0.85–0.9μm wavelengths

S. Penchev, V. Pencheva, S. Naboko

Proceedings Volume 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications; 1022611 (2017) https://doi.org/10.1117/12.2262567
Event: International Conference and School on Quantum Electronics "Laser Physics and Applications" - ICSQE 2016, 2016, Sozopol, Bulgaria

Abstract

The spectral range of 0.85 - 0.9μm wavelengths utilized by laser diode (LD) technology contains a relatively intensive spectrum of third rovibrational overtone of the water molecule, pure of interfering spectra of the other major atmospheric gases. We developed a spectroscopic application of pulsed 100W LDs generally limited by their broad, multimode laser line. In fact, their powerful laser radiation propagating in the atmosphere is modulated significantly by multiple resonance absorption lines. The magnitude of the integral absorption pattern is assessed combining theoretical and experimental calibration and using HITRAN database. The resultant absorption spectrum is found to be unsaturated, providing a great dynamic range of measurement of atmospheric humidity within 15% random error of lidar returns ranging to 2km. The reported DIAL technique which utilizes the advantage of direct detection of the lidar profiles and simple operation is prospective for the framework of atmospheric and climatic monitoring.

Citation Download Citation

S. Penchev, V. Pencheva, and S. Naboko "A compact DIAL hygrometer employing paired powerful laser diodes of 0.85–0.9μm wavelengths", Proc. SPIE 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications, 1022611 (5 January 2017); https://doi.org/10.1117/12.2262567

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