Controlling the shape of Talbot bands' visibility.
Controlling the shape of Talbot bands' visibility.
复制标题
控制塔尔博特带可见性的形状。
DOI:
10.1364/oe.16.009654
复制
发表时间:
2008
期刊:
影响因子:
3.8
通讯作者:
A. Podoleanu
中科院分区:
文献类型:
--
作者:
D. Woods;A. Podoleanu
We present a theoretical model to predict the sensitivity variation versus optical path difference (OPD) in Fourier domain spectral interferometry using configurations which produce Talbot bands. Such configurations require that the two interfering beams use different parts of the diffraction grating in the interrogating spectrometer. So far, the power distribution within the two beams in a Talbot bands experiment was considered uniform. In this report, we show that by manipulating the power distribution within the two interfering beams, the OPD value where maximum sensitivity is achieved can be conveniently tuned, as well as the sensitivity variation with OPD. Furthermore, creating a gap between the two beams leads to adjustment of the minimum detectable OPD value, while the width of the beams determine the maximum detectable OPD value. These features cannot be explained by theoretical models published so far involving spectrometer resolution elements only, while such features are correctly predicted by the model presented here.
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