title: Cavity-sensitive amplified spontaneous emission with radiation reabsorption.
abstract: We experimentally and numerically investigate amplified spontaneous emission (ASE) in the presence of radiation reabsorption by using an end-pumped ruby laser. From the fluorescence time decay in the axial direction, we find that the average path length of ASE is much larger than the reabsorption length and exhibits sharp variation near the semi-concentric cavity configuration; however, the side lifetime is independent of cavity configuration. In addition, an axial power bump corresponding to a side power valley and the enhanced fluorescence R-line spectrum are observed and explained.
authors: Ching-Hsu
authors: CH
authors: Chen
authors: Chi-Lin
authors: CL
authors: Liu
authors: Sheng-Ti
authors: ST
authors: Chung