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Updated: Jul 20, 2026

Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
Characterization of chromatic dispersion of optical filters by high-stability real-time spectral interferometry
1Bussan Nanotech Research Institute, Inc., Mitsui & Company, Tsukaba, Japan. ke-ogawa@xnri.com
Abstract:
Chromatic dispersion of optical filters is characterized by what is believed to be novel broadband spectral interferometry, which is based on dual-wavelength heterodyne measurement of spectral phase. High phase stability is achieved by differential phase detection using two lasers for wavelength-swept probe and phase-tracking reference. The technique provides self-tracking interferometry by passive stabilization of optical phase and allows real-time measurement of spectral phase and group delay with a low phase drift of less than 0.04pi. A fiber Bragg grating and a thin-film filter are characterized by this method.
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