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A Folded Configuration of a Fiber Sagnac-Based Sensor Array

✍ Scribed by B.J. Vakoc; M.J.F. Digonnet; G.S. Kino

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
141 KB
Volume
6
Category
Article
ISSN
1068-5200

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✦ Synopsis

We introduce a folded configuration of a previously described Sagnac interferometer-based sensor array. It is shown that the folded configuration lessens the detrimental effects of distributed phase modulations in the delay coil while also reducing the required delay coil length by a factor of 2. A prototype twosensor array was constructed and measured to perform according to theory, exhibiting a phase sensitivity of roughly 3 µrad/ √ Hz in a single-port detection configuration and 0.8 µrad/ √ Hz in a balanced detection configuration. The desensitization of the delay coil was measured to agree with theory.

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