Influence of ASE on the gain distribution in large size, high gain Yb^3+:YAG slabs

Abstract

Amplified spontaneous emission (ASE) in large size, high gain Yb(3+):YAG slabs severely impacts the gain/energy storage capability. We will discuss numerical simulations and experimental results obtained on large size Yb(3+):YAG slabs. The spatial distribution and temporal evolution is shown under different conditions.

Low Pressure Helium Cooled Active Mirror Amplifiers for HiPER KiloJoule Beamlines

“…Consequently this makes it more difficult to efficiently manage ASE issues [8]. At such temperatures, one cannot rely on classic index matching approaches, using e.g.…”

Active mirror amplifiers for HiPER kiloJoule beamlines

“…Having fixed the aperture (∼ 100 cm 2 ) and the extraction fluence (∼ 10 J/cm 2 ), we have performed a parametric study with parameters and limits given in table 1 and resulting optimum point of operation in section 4. Thermal management [7] and Amplified Spontaneous Emission management [8] solutions proposed within the LULI Lucia program framework helped us deriving an optimum point of operation. Figure 4 displays the resulting extracted fluence for I P = 6 kW/cm 2 .…”

Effect of amplified spontaneous emission and parasitic oscillations on the performance of cryogenically-cooled slab amplifiers

“…In the paper, the influence of ASE on the spatial distribution of the population inversion (small signal gain) has been shown, but only partially explained. The same problem was investigated in Albach et al (2009), in which the authors have explained the influence of gain on the spatial distribution of the population inversion.…”