Optimization of a He-Xe Hollow Cathode Discharge Laser.
Abstract
This work investigates the characteristics of a fixed geometry hollow cathode discharge laser containing various pressures and mixtures of helium (He) and xenon (Xe). The laser oscillates at an infrared wavelength of 3.507 micrometers. Power from three output couplers using mixtures of 2.5% to 20% Xe at pressures of two to eight torr are investigated. The output power is measured as a function of mixture, pressure, and output coupler. A 'modes of operation' model is developed to explain the variations in the curves for power vs anode current. The symmetric mode of operation is characterized by equivalent voltages driving the three anodes at the same current. The asymmetric mode of operation is characterized by the same currents being driven by different voltages, hence the asymmetry. The non-equal current (NEC) mode of operation is characterized by at least one of the anodes being driven at a different current. The results of the investigation reveal a maximum power of 1.16 mw with 10% Xe at 4 torr of pressure with an anode current of 27 mamps. Evidence is also presented that the asymmetric and NEC modes of operation can provide additional power after the symmetric mode has saturated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1982
- Accession Number
- ADA124768
Entities
People
- Jimmy C. Mann
Organizations
- Air Force Institute of Technology