研究目的
Investigating the effect of the Ar(3p54p; 2p) + M → Ar(3p54s; 1s) + M branching ratios on the performance of optically pumped rare gas lasers.
研究成果
The study demonstrates that the branching ratio significantly affects the performance of optically pumped rare gas lasers, with a factor of 7 increase in peak output laser intensity as the branching ratio is increased from 0.25 to 1.00. The Ar(1s4) species plays a key role in laser kinetics, and the total laser Ar* density evolves to match the discharge loss rates. Future studies should include the Ar(1s3) and Ar(1s2) levels in the kinetics model and perform kinetic measurements of the branching ratio.
研究不足
The study is limited by the uncertainty in the branching ratios and the exclusion of Ar(1s3) and Ar(1s2) levels in the kinetics model. Additionally, the simulations are based on a zero-dimensional model which may not capture all spatial effects.
1：Experimental Design and Method Selection:
The study uses a radio frequency dielectric barrier discharge (RF-DBD) as the source of metastable production for a variety of Argon in Helium mixtures over pressures ranging from 200 to 500 Torr. A sensitivity study is performed to determine the effect of branching ratios on output and absorbed pump laser intensities.
2：Sample Selection and Data Sources:
The analysis is based on metastable densities simulated for the RF-DBD with a peak applied voltage of 500 V and a driving frequency of 13.56 MHz.
3：56 MHz.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The zero-dimensional plasma kinetics model, ZDPlasKin, is used for gas discharge simulations, which employs BOLSIG+ for electron energy distribution function calculations.
4：Experimental Procedures and Operational Workflow:
The discharge simulations are carried out to an initial steady-state before the inclusion of laser rates. Then, the laser rates are included and the simulations are executed to a new steady-state where the densities and laser intensities are constant in time.
5：Data Analysis Methods:
The absorbed pump intensity and output laser intensity are calculated using specific equations that account for the branching ratios, pump laser intensity, and other parameters.
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