A statically scanned tandem interferometer

A static tandem Michelson interferometer configuration is reported for remote measurements of group delay change in a thermally modulated, optically dispersive BK7 glass sample. Using a superluminescent diode (SLD) to illuminate the interferometer, low-coherence measurement interferograms with signal-to-noise ratios as low as 16 dB were captured and subsequently processed using dispersive Fourier transform spectrometry (DFTS). Measurements of thermallyinduced delay change were made with < 2 fs root mean square error for optical path delay scans lengths of only 260 μm.

[1]  Y. Jaouën,et al.  Optical low-coherence reflectometry for complete chromatic dispersion characterization of few-mode fibers. , 2007, Optics letters.

[2]  Scott A. Diddams,et al.  Dispersion measurements with white-light interferometry , 1996 .

[3]  M. Monerie,et al.  Chromatic dispersion measurement from fourier transform of white-light interference patterns , 1987 .

[5]  Donal A. Flavin,et al.  Interferometric interrogation of in-fiber Bragg grating sensors without mechanical path length scanning , 2001 .

[6]  Akiko Hirai,et al.  Low-coherence tandem interferometer for measurement of group refractive index without knowledge of the thickness of the test sample. , 2003, Optics letters.

[7]  Julian D. C. Jones,et al.  Interferometric fiber-optic sensing based on the modulation of group delay and first order dispersion: application to strain-temperature measurand , 1995 .

[8]  D F Murphy,et al.  Dispersion-insensitive measurement of thickness and group refractive index by low-coherence interferometry. , 2000, Applied optics.

[9]  Andreas Koch,et al.  Displacement sensor with electronically scanned white-light interferometer , 1990, Other Conferences.

[10]  Dug Young Kim,et al.  Versatile chromatic dispersion measurement of a single mode fiber using spectral white light interferometry. , 2006, Optics express.

[11]  B. T. Meggitt,et al.  Electronically-scanned white light interferometry with enhanced dynamic range , 1990 .

[12]  Akiko Hirai,et al.  Measurement of group refractive index wavelength dependence using a low-coherence tandem interferometer. , 2006, Applied optics.