Multimode fiber interferometry with and without phase conjugation

Journal Article · Wed May 01 04:00:00 EDT 1991 · Applied Optics; (USA)

DOI:https://doi.org/10.1364/AO.30.001629· OSTI ID:5806345

Forman, P R; Jahoda, F C; Mason, B L ^[1]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (US)

It is generally assumed that fiber interferometers must be constructed from single-mode fibers. An alternative is to employ phase conjugation mirrors on the arms of a multimode fiber interferometer so that the spatial scrambling of modes is reversed, and good fringe contrast is maintained. When several interferometers all share the same self-conjugating BaTiO{sub 3} crystal, however, the results show crosstalk between the separate fibers ranging from negligible to prohibitively large depending on the precise spatial configuration within the conjugator. A model accounting for these results is proposed. In addition it was observed in control experiments with conventional Mach-Zehnder configurations that good data could be obtained despite reduced contrast with both graded and step index multimode fibers.

• OSTI ID: 5806345
• Journal Information: Applied Optics; (USA), Journal Name: Applied Optics; (USA) Vol. 30:13; ISSN 0003-6935; ISSN APOPA
• Country of Publication: United States
• Language: English

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