Confocal Fabry–Perot sensor

Confocal Fabry–Perot sensor

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
Electronics Letters — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

The use of a spherical mirror Fabry–Perot (confocal) interferometer as an optical displacement sensor is described. The device incorporates a simple electronic servo to maintain the interferometer at an operating point of maximum sensitivity. Applications as vibration and acceleration sensors are forseen, with sensitivities for sinusoidal accelerations of 10−3 μg achievable at 10 Hz.


    1. 1)
      • A. Dandridge , A.B. Tveten , G.H. Sigel , E.J. West , T.G. Giallorenzi . Optical fibre magnetic field sensors. Electron. Lett. , 408 - 409
    2. 2)
      • J.A. Bucaro , H.D. Dardy , J. Cardme . Fibre-optic hydrophone. J. Acoust. Soc. Am.
    3. 3)
      • W. Eickhoff . Temperature sensing by mode-mode interference in birefringent optical fibres. Opt. Lett.
    4. 4)
      • A.B. Tveten , A. Dandridge , C.M. Davis , T.G. Giallorenzi . Fibre-optic accelerometer. Electron. Lett. , 854 - 855
    5. 5)
      • D.A. Jackson , A. Dandridge , S.K. Sheem . Measurement of small phase shifts using a single mode optical fibre interferometer. Opt. Lett.
    6. 6)
      • S.C. Rashleigh . Acoustic sensing with a single coiled monomode fibre. Opt. Lett.
    7. 7)
      • A. Dandridge , R.O. Miles , T.G. Giallorenzi . Diode laser sensor. Electron. Lett. , 948 - 949
    8. 8)
      • M. Hercher . The spherical mirror Fabry–Perot interferometer. Appl. Opt.
    9. 9)
      • P.L. Eggins , D.A. Jackson , D.M. Paul . Measurement of mean velocity and turbulence in supersonic boundary layers, shock waves and free jets by laser anemometry. J. Opt. Electron.

Related content

This is a required field
Please enter a valid email address