Vol. 62, No. 11, November 2012, pp. 1182∼1186
New Physics: Sae Mulli, DOI: 10.3938/NPSM.62.1182
Phase Change Measurement for a Glass Plate
by Using Mach-Zehnder Type White-light Iinterferometry
Kim Myung-Whun* · Khos-Ochir Tsogvoo
Department of Physics and IPIT, Chonbuk National University, Jeonju 561-756, Korea (Received 4 October 2012 : revised 17 October 2012 : accepted 26 October 2012)
We constructed a Mach-Zehnder type white-light interferometer with a tungsten-halogen lamp and a spectrometer. We measured the interference signal in the wavelength range from 400 nm to 1100 nm. By utilizing a Fourier transformation method, we obtained the phase difference between two light beams traveling along different paths. We obtained the phase difference due to the sample (150-µm glass) and estimated the group delay (GD) and group delay dispersion (GDD), and the results were consistent with the theoretical values obtained from Sellmeier’s formula.
PACS numbers: 42.25.Hz, 42.30.Rx, 42.30.Kq
Keywords: White light interferometry, Fourier transformation, Group delay dispersion
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PACS numbers: 42.25.Hz, 42.30.Rx, 42.30.Kq
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