Title

Integrated Fiber Optic Displacement Sensor Based On Multimode Interference

Keywords

Finite difference beam propagation method (FD-BPM); Linearly polarized modes; Multimode interference; Re-imaging theory

Abstract

An integrated fiber-optic displacement sensor based on multimode interference is characterized through analysis of experimental performance in comparison to the expected behavior that is theoretically predicted. Multimode interference and re-imaging theory applied to the specific fiber properties and geometry of the device can be used to design and predict the performance of the device. Essentially, the sensor consists of a multimode fiber of a specific length fusion spliced to a single mode fiber used in conjunction with an 80/20 splitter, source, and detector that are used to inject and detect reflected signals from targets. The sensor is fabricated into a robust, compact, and single arm device capable of operating as a calibrated displacement sensor over a large displacement range. This is achieved through analysis of power reflected off of a surface and back through the device over a finite wavelength range.

Publication Date

12-1-2003

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

5177

Number of Pages

60-66

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.511124

Socpus ID

2342534479 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/2342534479

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