Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Feedback and harmonic locking of slot-type optomechanical oscillators to
  external low-noise reference clocks   We demonstrate feedback and harmonic locking of chip-scale slot-type
optomechanical oscillators to external low-noise reference clocks, with
suppressed timing jitter by three orders of magnitude. The feedback and
compensation techniques significantly reduce the close-to-carrier phase noise,
especially within the locking bandwidth for the integral root-mean-square
timing jitter. Harmonic locking via high-order carrier signals is also
demonstrated with similar phase noise and integrated root-mean-square timing
jitter reduction. The chip-scale optomechanical oscillators are tunable over an
80-kHz range by tracking the reference clock, with potential applications in
tunable radio-frequency photonics platforms.

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The categories of this paper are: cs
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The categories of this paper are: math-ph
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: stat
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The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
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The categories of this paper are: hep-th
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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th