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Proceedings Paper

Sub-millimeter resolution laser ranging at 9.3 kilometers using temporally stretched frequency chirped pulses from a mode-locked laser
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Paper Abstract

A chirped fiber Bragg grating with a dispersion of 1651ps/nm is used to generate temporally stretched, frequency chirped pulses from a passively mode locked fiber laser that generates pulses of ~1ps (FWHM) duration at a repetition rate of 20MHz with 3.5mW average power (peak power of 175W). The use of a chirped fiber Bragg grating enables the generation of temporally stretched pulses with low peak power so that non-linear effects in the fiber can be avoided. A fiber based interferometeric arrangement is used for interfering a reference signal with the reflected signal from the target to realize a coherent heterodyne detection scheme. In the RF domain, the detected heterodyne beat frequency shifts as the target distance is changed. A round trip target distance of 14km in air is simulated using 9.3km of optical fiber and a resolution of less than a millimeter is observed.

Paper Details

Date Published: 28 April 2009
PDF: 11 pages
Proc. SPIE 7339, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications V, 73390I (28 April 2009); doi: 10.1117/12.820761
Show Author Affiliations
Mohammad Umar Piracha, College of Optics & Photonics, Univ. of Central Florida (United States)
Dat Nguyen, College of Optics & Photonics, Univ. of Central Florida (United States)
Dimitrios Mandridis, College of Optics & Photonics, Univ. of Central Florida (United States)
Tolga Yilmaz, Raydiance, Inc. (United States)
David Gaudiosi, Raydiance, Inc. (United States)
Peter J. Delfyett, College of Optics & Photonics, Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 7339:
Enabling Photonics Technologies for Defense, Security, and Aerospace Applications V
Michael J. Hayduk; Peter J. Delfyett Jr.; Andrew R. Pirich; Eric J. Donkor, Editor(s)

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