Saturation of the gain in laser amplifiers by feedback of amplified spontaneous emission (ASE)
- Cite this article as:
- Munz, M. & Haag, G. Z. Physik B - Condensed Matter (1983) 50: 79. doi:10.1007/BF01307230
The influence of amplified spontaneous emission (ASE) on the operation of laser amplifiers is studied with a photon-transport equation approach. Nonsaturable losses are included in our considerations. Two different amplifier geometries are considered, the single-pass- and the double-pass configuration. In both cases closed equations for the stage gain and the ASE-output are derived. The feedback of ASE leads to a new saturation behavior of the gain in dependence of the pump intensity.