Fiber-coupled displacement interferometry without periodic nonlinearity

Jonathan D. Ellis, Arjan J.H. Meskers, Jo W. Spronck, Robert H.Munnig Schmidt

Research output: Contribution to journalArticle

30 Scopus citations


Displacement interferometry is widely used for accurately characterizing nanometer and subnanometer displacements in many applications. In many modern systems, fiber delivery is desired to limit optical alignment and remove heat sources from the system, but fiber delivery can exacerbate common interferometric measurement problems, such as periodic nonlinearity, and account for fiber-induced drift. In this Letter, we describe a novel, general Joo-type interferometer that inherently has an optical reference after any fiber delivery that eliminates fiber-induced drift. This interferometer demonstrated no detectable periodic nonlinearity in both free-space and fiber-delivered variants.

Original languageEnglish (US)
Pages (from-to)3584-3586
Number of pages3
JournalOptics letters
Issue number18
Publication statusPublished - Sep 15 2011
Externally publishedYes


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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