Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of an electro-optic modulator capable of generating simultaneous
  amplitude and phase modulations   We report on the analysis and prototype-characterization of a dual-electrode
electro-optic modulator that can generate both amplitude and phase modulations
with a selectable relative phase, termed a universally tunable modulator (UTM).
All modulation states can be reached by tuning only the electrical inputs,
facilitating real-time tuning, and the device is shown to have good suppression
and stability properties. A mathematical analysis is presented, including the
development of a geometric phase representation for modulation. The
experimental characterization of the device shows that relative suppressions of
38 dB, 39 dB and 30 dB for phase, single-sideband and carrier-suppressed
modulations, respectively, can be obtained, as well as showing the device is
well-behaved when scanning continuously through the parameter space of
modulations. Uses for the device are discussed, including the tuning of lock
points in optical locking schemes, single sideband applications, modulation
fast-switching applications, and applications requiring combined modulations.

9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int