A Novel Mach-Zehnder Interferometer Using Eccentric-Core Fiber Design for Optical Coherence Tomography

Sensors
Qiao XiongFang Liu

Abstract

A novel Mach-Zehnder interferometer using eccentric-core fiber (ECF) design for optical coherence tomography (OCT) is proposed and demonstrated. Instead of the commercial single-mode fiber (SMF), the ECF is used as one interference arm of the implementation. Because of the offset location of the eccentric core, it is sensitive to directional bending and the optical path difference (OPD) of two interference arms can be adjusted with high precision. The birefringence of ECF is calculated and experimentally measured, which demonstrates the polarization sensitivity of the ECF proposed in the paper is similar to that of SMF. Such a structure can replace the reference optical delay line to form an all-fiber passive device. A mirror is used as a sample for analyzing the ECF bending responses of the system. Besides, four pieces of overlapping glass slides as sample are experimentally measured as well.

References

Nov 22, 1991·Science·D HuangC A Puliafito
May 6, 2006·Journal of Biomedical Optics·Guillermo J TearneyBrett E Bouma
Dec 15, 2007·Optics Letters·A M Rollins, J A Izatt
Mar 10, 2010·Journal of Biomedical Optics·Ehsan AzimiMark E Brezinski
Apr 28, 2017·Scientific Reports·Vala FathipourHooman Mohseni

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Citations

Jul 8, 2020·Sensors·Joanna Sekulska-NalewajkoEwa Korzeniewska

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Methods Mentioned

BETA
imaging technique

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