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Published on: December 5, 2025
Gain measurements in the KrCl excimer laser
E Armandillo1, A Luches, V Nassisi
1ENEA-CRE, Laboratorio Tecnologie Speciali, Casaccia, Roma, Italy.
Applied Optics
|January 1, 1985
Summary
Researchers measured net gain at 222.4 nm in a KrCl laser using amplified spontaneous emission. A maximum net gain of 0.15 cm⁻¹ was achieved in a specific gas mixture and pressure, offering insights into laser performance.
Area of Science:
- Laser Physics
- Gas Discharge Physics
- Spectroscopy
Background:
- KrCl lasers are important sources of ultraviolet (UV) radiation.
- Accurate net gain measurements are crucial for optimizing laser performance.
- Previous measurements using the passive absorption cell method have limitations.
Purpose of the Study:
- To measure the net gain at 222.4 nm in a discharge-pumped UV-preionized KrCl laser.
- To investigate the influence of pump rate and total pressure on net gain.
- To compare results with previous measurements.
Main Methods:
- Utilized the single-pass/double-pass amplified spontaneous emission (ASE) technique.
- Employed a discharge-pumped UV-preionized KrCl laser.
- Varied pump rate and total pressure in He- and Ne-based gas mixtures.
Main Results:
- Achieved a maximum net gain of 0.15 cm⁻¹.
- The optimal mixture was 0.09% HCl/10.1% Kr/1.5% He/88.3% Ne.
- Optimal conditions included a total pressure of 355 kPa and power loading of ~21 MW/cc.
Conclusions:
- The ASE technique provides reliable net gain measurements for KrCl lasers.
- Gas mixture composition, pressure, and pump rate significantly affect net gain.
- The obtained data offers a valuable comparison with existing literature.
