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Proceedings Paper

Cascade lasing of molecular HBr in the four-micron region pumped by a Nd:YAG laser
Author(s): Christopher S. Kletecka; Wolfgang G. Rudolph; Jeffrey W. Nicholson; Randy Jones; Neil Campbell
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Paper Abstract

Due to a narrow window of high atmospheric transmission near 4 microns, there is a great deal of interest for a scalable laser energy source in this spectral region. We propose a concept that combines the advantages of solid-state and gas laser technology. A Nd:YAG laser is tuned to 1.3391 microns by inserting an intracavity etalon and raising the operating temperature of the laser rod to 85 degree(s)C. This allows us to excite the v (0 →3), J (4 → 5) vibrational-rotational transition of HBr. To stabilize the frequency, a diode laser locked to this HBr transition seeds the Nd:YAG laser. Once excited, HBr can potentially lase in three subsequent steps to the ground state, emitting three photons in the 4-micron region. We present theoretical and experimental results demonstrating the operational principle of this laser system.

Paper Details

Date Published: 13 September 2002
PDF: 9 pages
Proc. SPIE 4760, High-Power Laser Ablation IV, (13 September 2002); doi: 10.1117/12.482133
Show Author Affiliations
Christopher S. Kletecka, Univ. of New Mexico (United States)
Wolfgang G. Rudolph, Univ. of New Mexico (United States)
Jeffrey W. Nicholson, Lucent Technologies/Bell Labs. (United States)
Randy Jones, Applied Research Associates (United States)
Neil Campbell, Applied Research Associates (United States)


Published in SPIE Proceedings Vol. 4760:
High-Power Laser Ablation IV
Claude R. Phipps, Editor(s)

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