OSA's Digital Library

Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 31, Iss. 9 — May. 1, 2013
  • pp: 1488–1494

Hydrostatic Pressure Measurement With Heterodyning Fiber Grating Lasers: Mechanism and Sensitivity Enhancement

Long Jin, Zhan Quan, Linghao Cheng, and Bai-Ou Guan

Journal of Lightwave Technology, Vol. 31, Issue 9, pp. 1488-1494 (2013)


View Full Text Article

Acrobat PDF (763 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations
  • Export Citation/Save Click for help

Abstract

In this paper, dual-polarization fiber grating lasers are exploited as heterodyning sensors for hydrostatic pressure measurement. The laser is formed by photo-inscribing two highly reflective wavelength-matched Bragg gratings over a short section of Er-doped fiber. The measurement is carried out by monitoring the beat frequency between the orthogonally polarized laser output. The pressure sensitivity of a bare sensor is -0.59 MHz/MPa. Theoretical analysis suggests that the pressure response is dominantly determined by the change in intra-cavity birefringence, which is associated with the geometrical imperfection of the fiber core. The effects of differences in elastic properties between fiber core and cladding on the pressure response are examined. We found that the differences in Young's modulus and Poisson's ratio are mainly responsible for the pressure sensitivity. The pressure sensitivity can be significantly enhanced by packaging the laser into a polymer incorporated with a steel rod. Due to the difference in elastic properties between materials, an additional birefringence is introduced into the laser cavity under hydrostatic pressure. The sensitivity has been enhanced by 228 times, to 170 MHz/MPa. The minimal detectable pressure change of the packaged sensor is about 0.01 MPa. We further demonstrate a miniature packaged sensor with a cross-sectional dimension of only 1.42 mm and a pressure sensitivity of 53.9 MHz/MPa towards practical applications.

© 2013 IEEE

Citation
Long Jin, Zhan Quan, Linghao Cheng, and Bai-Ou Guan, "Hydrostatic Pressure Measurement With Heterodyning Fiber Grating Lasers: Mechanism and Sensitivity Enhancement," J. Lightwave Technol. 31, 1488-1494 (2013)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-31-9-1488

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited