Scalable microplasma array for argon metastable lasing medium
Abstract
Optically pumped rare gas laser systems require a lasing medium of high density metastable atoms. A scalable two-dimensional array of quarter-wave resonators produces high microwave electric fields suitable for generating a dense gas of argon 1s5 states. This resonator array is immersed within an evacuated waveguide in order to create a volume of plasma in a relatively wide discharge gap (13 mm) at argon-helium pressures up to 100 Torr using 30 W of continuous microwave power at 2.3 GHz. Spatial density profiles of argon 1s5 states are measured using diode laser absorption spectroscopy with 0.5 mm resolution. The region of argon 1s5 states is mapped in the discharge and shown to have an estimated density in excess of 1×1018m−3 within a volume of 11.6×3.2×0.8mm3.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 22, 2019
- Source ID
- 10.1063/1.5119511
Entities
People
- Hyunjun Kim
- Jeffrey A. Hopwood
Organizations
- Tufts University
- United States Army