Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Demonstration of a passive sub-picostrain fiber strain sensor   We demonstrate a fiber Fabry-Perot (FFP) sensor capable of detecting
sub-picostrain signals, from 100 Hz and extending beyond 100 kHz, using the
Pound-Drever-Hall frequency locking technique. A low power diode laser at 1550
nm is locked to a free-space reference cavity to suppress its free-running
frequency noise, thereby stabilizing the laser. The stabilized laser is then
used to interrogate a FFP where the PDH error signal yields the instantaneous
fiber strain.

30
The categories of this paper are: q-alg
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The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex