Abstract
An interferometric system with a low-coherence light source and two multimode fiber-optic light guides operating in an intermode interference regime is considered theoretically. It is shown that the employment of fiber-optic intermode interferometers significantly expands the range of permissible mismatch between the lengths of the reference and signal interferometers. Mismatch up to a few centimeters is possible for light-emitting diodes (LED’s). The use of multimode light guides and intermode interference facilitates the construction of systems with fibers of great length and matching to an optical source.
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