Measurement of sub-fm/Hz(1/2) displacement spectral densities in ultrahigh-Q single-crystal microcavities with hertz-level lasers

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 20
  • Download : 0
Tracing a resonance frequency of a high quality factor (Q) optical cavity facilitates subpicometer displacement measurements of the optical cavity via Pound-Drever-Hall (PDH) locking scheme, tightly synchronizing a laser frequency to the optical cavity. Here we present observations of subfemtometer displacements on a ultrahigh-Q single-crystal MgF2 whispering-gallery-mode microcavity by frequency synchronization between a 1 Hz cavity-stabilized laser and a resonance of the MgF2 cavity using PDH laser-cavity locking. We characterize not only the displacement spectral density of the microcavity with a sensitivity of 1.5 x 10(-16) m/Hz(1/2) over the Fourier offset frequency ranging from 15 mHz to 100 kHz but also a 1.77 nm displacement fluctuation of the microcavity over 4500 s. Such measurement capability not only supports the analysis of integrated thermodynamical and technical cavity noise but allows for minute displacement measurements using laser-cavity locking for ultraprecise positioning, metrology, and sensing. (C) 2022 Chinese Laser Press
Publisher
CHINESE LASER PRESS
Issue Date
2022-05
Language
English
Article Type
Article
Citation

PHOTONICS RESEARCH, v.10, no.5, pp.1202 - 1209

ISSN
2327-9125
DOI
10.1364/PRJ.449782
URI
http://hdl.handle.net/10203/296652
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0