Optical Capillary Fiber Mode Interferometer for Pressure Sensing

Guillermo Salceda-Delgado, Amy Van Newkirk, Jose Enrique Antonio-Lopez, Alejandro Martinez-Rios, Axel Schulzgen, Rodrigo Amezcua-Correa

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


A compact optical fiber pressure sensor is experimentally presented. It consists of a few millimeter long section of a capillary optical fiber spliced between two single-mode fibers (SMFs). Due to the interference between propagating light in the capillary fiber caused by the fundamental core mode of the input SMF, an interference pattern is generated in the transmission spectrum of the device through the output SMF. When pressure is applied to the device, the distributed forces on the capillary tube fiber lead to changes in the visibility of the interference fringes and a wavelength shift. The visibility changes are directly correlated to the pressure applied to the device. The dynamic range of the device can be tailored by selecting a suitable length of the capillary fiber. The response of the device to temperature changes is also discussed.

Original languageEnglish (US)
Article number8901212
Pages (from-to)2253-2260
Number of pages8
JournalIEEE Sensors Journal
Issue number5
StatePublished - Mar 1 2020

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering


Dive into the research topics of 'Optical Capillary Fiber Mode Interferometer for Pressure Sensing'. Together they form a unique fingerprint.

Cite this