Proceedings of the Optical Society of Korea Conference (한국광학회:학술대회논문집)
- 2007.07a
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- Pages.111-112
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- 2007
Measurement of Spatial Coherence Function of laser beam by using a Sagnac Interferometer
샤냑간섭계를 이용한 레이져빔의 Spatial Coherence Function 측정
- Lee, Chang-Hyouck (Physics Department, Inha University) ;
- Kang, Yoon-Shik (Physics Department, Inha University) ;
- Sung, Yu-Gene (Physics Department, Inha University) ;
- Noh, Jae-Woo (Physics Department, Inha University)
- Published : 2007.07.01
Abstract
The spatial coherence function of laser beam was measured by using a Sagnac interferometer and self referencing technique. For laser beam passing through a narrow slit, absolute value of measured spatial coherence function becomes more symmetric as the slit size is reduced. For diverging beams, the spatial coherence function shows fast oscillations in its real and imaginary parts. We explain this by using a Gaussian Schell-model. One can use this measurement method to study and characterize the property of light field coming out of small sample.
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