Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A phase-locked laser system based on modulation technique for atom
  interferometry   We demonstrate a Raman laser system based on phase modulation technology and
phase feedback control. The two laser beams with frequency difference of 6.835
GHz are modulated using electro-optic and acousto-optic modulators,
respectively. Parasitic frequency components produced by the electro-optic
modulator are filtered using a Fabry-Perot Etalon. A straightforward phase
feedback system restrains the phase noise induced by environmental
perturbations. The phase noise of the laser system stays below -125 rad2/Hz at
frequency offset higher than 500 kHz. Overall phase noise of the laser system
is evaluated by calculating the contribution of the phase noise to the
sensitivity limit of a gravimeter. The results reveal that the sensitivity
limited by the phase noise of our laser system is lower than that of a
state-of-art optical phase-lock loop scheme when a gravimeter operates at short
pulse duration, which makes the laser system a promising option for our future
application of atom interferometer.

22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas