Gain measurements in the KrCl excimer laser

Abstract
The single-pass/double-pass amplified spontaneous emission technique has been used to measure the net gain at 222.4 nm in a discharge-pumped UV-preionized KrCl laser. The net gain has been measured as a function of pump rate and total pressure in He- and Ne-based gas mixtures. A maximum net gain of 0.15 cm'1 has been obtained in a 0.09% HCl/10.1% Kr/1.5% He/88.3% Ne mixture at a total pressure of 355 kPa and at a specific power loading of ∼21 MW/cc. The data presented are compared with previous net gain measurements performed using the passive absorption cell method.