Improvement of the extinction ratio performance of a fiber laser based rangefinder by using successive real-time statistical algorithms

F. Chiquet; G. Pallier; A. Portalis; P. Auffray; N. Bertaux; G. Canat; M. Le Flohic

doi:10.1117/12.2262405

27 April 2017 Improvement of the extinction ratio performance of a fiber laser based rangefinder by using successive real-time statistical algorithms

F. Chiquet, G. Pallier, A. Portalis, P. Auffray, N. Bertaux, G. Canat, M. Le Flohic

Author Affiliations +

Proceedings Volume 10208, Fiber Optic Sensors and Applications XIV; 1020805 (2017) https://doi.org/10.1117/12.2262405
Event: SPIE Commercial + Scientific Sensing and Imaging, 2017, Anaheim, CA, United States

Abstract

Today, it is commonly agreed that mid-range rangefinders (typical range: 10 km) based on fiber laser technology, constitute the best trade-off between performance and reliability. But to intend to compete with long-range devices and propose an alternative to bulk solid state laser systems, it is essential to increase significantly their extinction ratio (ER) compared to the state of the art. In this paper, we report on successive real-time statistical algorithms performed on 2 different fiber laser rangefinders and the feasability to achieve an extinction ratio up to 45dB in an eye-safety burst mode. Based on a bi-static architecture and equipped with a 38 μJ and 125 μJ, 10 ns pulse fiber laser, their intrinsic ER in single-pulse emission has been measured respectively at 28 and 33 dB. A 45 mm optical aperture receiver and a specially designed compact electronics complete the device. This alternative to solid-states systems dedicated to long range application, represents then a cost-effective solution.

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Citation Download Citation

F. Chiquet, G. Pallier, A. Portalis, P. Auffray, N. Bertaux, G. Canat, and M. Le Flohic "Improvement of the extinction ratio performance of a fiber laser based rangefinder by using successive real-time statistical algorithms", Proc. SPIE 10208, Fiber Optic Sensors and Applications XIV, 1020805 (27 April 2017); https://doi.org/10.1117/12.2262405

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