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Optics Letters

Optics Letters


  • Vol. 21, Iss. 4 — Feb. 15, 1996
  • pp: 302–304

All-fiber three-path Mach–Zehnder interferometer

Gregor Weihs, Michael Reck, Harald Weinfurter, and Anton Zeilinger  »View Author Affiliations

Optics Letters, Vol. 21, Issue 4, pp. 302-304 (1996)

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We report the realization of a three-path Mach–Zehnder interferometer using single-mode fibers and two integrated 3 × 3 fiber couplers. We observed enhanced phase sensitivity, as compared with two-path interferometers, with a visibility of the interference pattern of more than 97%. This interferometer has an analog in two-photon interferometry, and we believe it to be the first nontrivial example of N × N multiport interferometers.

© 1996 Optical Society of America

Original Manuscript: August 14, 1995
Published: February 15, 1996

Gregor Weihs, Michael Reck, Harald Weinfurter, and Anton Zeilinger, "All-fiber three-path Mach–Zehnder interferometer," Opt. Lett. 21, 302-304 (1996)

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  1. M. Reck, A. Zeilinger, H. Bernstein, P. BertaniPhys. Rev. Lett. 73, 58 (1994). [CrossRef] [PubMed]
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  7. S. K. SheemJ. Appl. Phys. 52, 3865 (1981). [CrossRef]
  8. R. Ulrich, S. C. Rashleigh, W. EickhoffOpt. Lett. 5, 273 (1980). [CrossRef] [PubMed]
  9. R. M. A. Azzam, N. M. BasharaEllipsometry and Polarized Light (North-Holland, Amsterdam, 1977).

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