Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stability Transfer between Two Clock Lasers Operating at Different
  Wavelengths for Absolute Frequency Measurement of Clock Transition in 87Sr   We demonstrated transferring the stability of one highly stable clock laser
operating at 729 nm to another less stable laser operating at 698 nm. The two
different wavelengths were bridged using an optical frequency comb. The
improved stability of the clock laser at 698 nm enabled us to evaluate the
systematic frequency shifts of the Sr optical lattice clock with shorter
averaging time. We determined the absolute frequency of the clock transition
1S0 - 3P0 in 87Sr to be 429 228 004 229 873.9 (1.4) Hz referenced to the SI
second on the geoid via International Atomic Time (TAI).

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The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an