Dynamic displacement measurements with a dual-cavity fiber Fabry-Perot interferometer

An extrinsic fiber Fabry-Perot interferometric sensor is reported for use in vibrometric applications. The sensor operates on the principle of a "virtual" dual-cavity generated within the sensing arm due to the introduction of a birefringent element into the optical path of the sensing cavity. The resulting two sets of "phase-shifted" interference signals produced allowed non-ambiguous directional detection as well as improved resolution in displacement measurements. Experimental displacement data obtained using the fiber interferometer were found to be in good agreement with the reference sensor employed. The potential for overcoming polarization-induced signal fading is also qualitatively illustrated.

[1]  Kazuo Hotate.  Fiber Sensor Technology Today , 1996, QELS 1996.

[2]  B. T. Meggitt,et al.  Optical Fiber Sensor Technology Fundamentals , 2000 .

[3]  Giuseppe Molesini,et al.  Accurate polarization interferometer , 1995 .

[4]  B. Kim,et al.  Fiber-optic sensor array without polarization-induced signal fading. , 1995, Optics letters.

[5]  T. K. Gangopadhyay,et al.  Vibration: history and measurement with an extrinsic Fabry-Perot sensor with solid-state laser interferometry. , 1999, Applied optics.

[6]  D. A. Jackson,et al.  Principles of Fiber-Optic Interferometry , 2000 .

[7]  G. Hernandez,et al.  Fabry-Perot Interferometers , 1986 .

[8]  B. Culshaw,et al.  Optical acoustic detector based on a fiber Fabry-Perot interferometer. , 2005, Applied optics.

[9]  H. Seat.  A pseudo dual-cavity extrinsic fibre Fabry-Pérot interferometric vibrometer , 2004 .

[10]  David A. Jackson,et al.  Optical fiber sensing with a low-finesse Fabry-Perot cavity. , 1992, Applied optics.

[11]  Tingyun Wang,et al.  A high precision displacement sensor using a low-finesse fiber-optic Fabry-Pérot interferometer , 1998 .

[12]  A Choudry,et al.  Digital holographic interferometry of convective heat transport. , 1981, Applied optics.

[13]  Eric Udd,et al.  An overview of fiber‐optic sensors , 1995 .

[14]  R O Claus,et al.  Quadrature phase-shifted, extrinsic Fabry-Perot optical fiber sensors. , 1991, Optics letters.

[15]  S. Pullteap,et al.  An Extrinsic Fibre Optic Interferometer with Possible Signal Fading Compensation for Vibrometric Applications , 2005, 2005 IEEE Instrumentationand Measurement Technology Conference Proceedings.

[16]  D. Jackson.  Monomode optical fibre interferometers for precision measurement , 1985 .

[17]  R. Dewhurst,et al.  New field formulas for the Fabry - Pérot interferometer and their application to ultrasound detection , 1998 .

[18]  A. Kersey.  A Review of Recent Developments in Fiber Optic Sensor Technology , 1996 .