Raman shifter optimized for lidar at 1.5 μm wavelength

A Raman shifter is optimized for generating high-energy laser pulses at a 1.54 μm wavelength. A forward-scattering design is described, including details of the multiple pass and nonfocused optical design, Stokes injection seeding, and internal gas recirculation. First-Stokes conversion efficiencies up to 43%--equivalent to 62% photon conversion efficiency--were measured. Experimental results show output average power in excess of 17.5 W, pulse energies of 350 mJ at 50 Hz, with good beam quality (M²<6). Narrow bandwidth and tunable output is produced when pumping with a single longitudinal mode Nd:YAG laser and seeding the process with a Stokes wavelength narrowband laser diode.

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Copyright 2007 Optical Society of America. This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website:http://www.opticsinfobase.org/abstract.cfm?uri=ao-46-15-2990. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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Author Spuler, Scott M.
Mayor, Shane
Publisher UCAR/NCAR - Library
Publication Date 2007-05-01T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2025-07-17T17:02:19.438998
Metadata Record Identifier edu.ucar.opensky::articles:6776
Metadata Language eng; USA
Suggested Citation Spuler, Scott M., Mayor, Shane. (2007). Raman shifter optimized for lidar at 1.5 μm wavelength. UCAR/NCAR - Library. https://n2t.org/ark:/85065/d7w37wk8. Accessed 02 August 2025.

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