Acoustically Scanned Delay For White-Light Interferometry
Abstract
In white-light interferometry, two unbalanced interferometers are coupled in tandem. Typically, two Michelson interferometers are used. The optical pathlength difference between the two arms in each interferometer is large compared to the source coherence length. The measurand acts on one arm of the sensing interferometer, determining its optical pathlength. The length of one arm of the second interferometer, which is called the reference or receiving interferometer, is scanned, and a visibility maximum is observed when the pathlength mismatch is the same for the two interferometers [1]. The technique is closely related to a multiplexing technique called coherence multiplexing, in which fiber-optic Mach-Zehnder interferometers [2,3] or polarimeters [4] are often used.
Related Papers
- → The theoretical and experimental study on white light interferometric fiber optic sensors network based on Michelson and Mach-Zehnder interferometers(2011)2 cited
- → Mach-Zehnder optical fiber interferometers for the detection of ultrasound(2000)10 cited
- → Acoustically Scanned Delay For White-Light Interferometry(1992)1 cited
- Research on measurement of absolute distances and displacements by an interferometric technique using a white-light spectral interferometer(2009)