Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kerr-lens mode-locked lasers as transfer oscillators for optical
  frequency measurements   We introduce a novel concept for optical frequency measurement and division
which employs a Kerr-lens mode-locked laser as a transfer oscillator whose
noise properties do not enter the measurement process. We experimentally
demonstrate, that this method opens up the route to phase-link signals with
arbitrary frequencies in the optical or microwave range while their frequency
stability is preserved.

34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph