Displacement interferometry with fiber-coupled delivery

Conference paper (2011)

Authors

A.J.H. Meskers Mechatronic Systems Design - Mechanical, Maritime and Materials Engineering
J.D. Ellis Mechatronic Systems Design - Mechanical, Maritime and Materials Engineering
J.W. Spronck Mechatronic Systems Design - Mechanical, Maritime and Materials Engineering
R.H. Munnig Schmidt Mechatronic Systems Design - Mechanical, Maritime and Materials Engineering
Research Group
Mechatronic Systems Design (Mechanical, Maritime and Materials Engineering) (TU Delft)
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Published Date

2011

Language

English

Reuse Rights

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Precision and Microsystems Engineering

Research Group

Mechatronic Systems Design

Abstract

Heterodyne interferometry is a widely applied technique for length and displacement measurements in precision systems. Free-space optical beam delivery couples the source directly to the interferometer location. Conversely, fiber delivery is desired to decouple the source and interferometer. Drawbacks to using fibers are either time consuming alignment (PM fiber) or time varying polarization output (MM fiber). Jones matrices were used to analyze Joo-type interferometers to simulate the effects of using MM fiber inputs. The results showed loss of interference at some instances from the rotating polarization states. Measurements with a MM fiber coupled interferometer showed minimal polarization rotation and no interference loss.