Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental evidence and theoretical modeling of two-photon absorption
  dynamics in the reduction of intensity noise of solid-state Er:Yb lasers   A theoretical and experimental investigation of the intensity noise reduction
induced by two-photon absorption in a Er,Yb:Glass laser is reported. The time
response of the two-photon absorption mechanism is shown to play an important
role on the behavior of the intensity noise spectrum of the laser. A model
including an additional rate equation for the two-photon-absorption losses is
developed and allows the experimental observations to be predicted.

9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph