Cascade lasing of molecular HBr in the four-micron region pumped by a Nd:YAG laser

Christopher S. Kletecka; Wolfgang G. Rudolph; Jeffrey W. Nicholson; Randy Jones; Neil Campbell

doi:10.1117/12.482133

13 September 2002 Cascade lasing of molecular HBr in the four-micron region pumped by a Nd:YAG laser

Christopher S. Kletecka, Wolfgang G. Rudolph, Jeffrey W. Nicholson, Randy Jones, Neil Campbell

Proceedings Volume 4760, High-Power Laser Ablation IV; (2002) https://doi.org/10.1117/12.482133
Event: International Symposium on High-Power Laser Ablation 2002, 2002, Taos, New Mexico, United States

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.

Citation Download Citation

Christopher S. Kletecka, Wolfgang G. Rudolph, Jeffrey W. Nicholson, Randy Jones, and Neil Campbell "Cascade lasing of molecular HBr in the four-micron region pumped by a Nd:YAG laser", Proc. SPIE 4760, High-Power Laser Ablation IV, (13 September 2002); https://doi.org/10.1117/12.482133

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