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Proceedings Paper

Investigations of a dual seeded 1178nm Raman laser system
Author(s): Matthew Block; Leanne J. Henry; Michael Klopfer; Ravinder Jain
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Paper Abstract

The leakage of 1121 nm power from a resonator cavity because of spectral broadening seriously degrades the performance of a Raman resonator by reducing the 1121 nm circulating power and the 1178 nm output power. Therefore, it is important to understand the conditions which minimize 1121 nm power leakage, maximize 1121 intracavity and 1178 nm output power while enabling a manageable Stimulated Brillouin Scattering gain for narrow linewidth systems. It was found that cavity lengths longer than approximately 40 m didn’t result in significantly more 1121 nm linewidth broadening. Relative to the high reflectivity bandwidth of the fiber Bragg gratings, it was found that 4 nm FBGs seemed to optimize 1178 nm amplification while minimizing the amount of 1121 nm power leakage. A two stage high power 1178 nm Raman system was built and 20 W of 1178 nm output power was achieved with a polarization extinction ratio of 21 and nearly diffraction limited beam quality. Linewidth broadening was found to increase as the 1178 nm output increased and was approximately 8 GHz when the 1178 nm output power was 20 W. Because of the linewidth broadening, a co-pumped second Stokes Raman laser system is not useful for the sodium guidestar laser application which requires narrow linewidth.

Paper Details

Date Published: 22 April 2016
PDF: 10 pages
Proc. SPIE 9727, Laser Resonators, Microresonators, and Beam Control XVIII, 97271N (22 April 2016); doi: 10.1117/12.2206036
Show Author Affiliations
Matthew Block, Leidos, Inc. (United States)
Leanne J. Henry, Air Force Research Lab. (United States)
Michael Klopfer, The Univ. of New Mexico (United States)
Ravinder Jain, The Univ. of New Mexico (United States)


Published in SPIE Proceedings Vol. 9727:
Laser Resonators, Microresonators, and Beam Control XVIII
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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