Engineering Proceedings | |
Enhancing Phase Measurement by a Factor of Two in the Stokes Correlation | |
article | |
Amit Yadav1  Tushar Sarkar1  Takamasa Suzuki2  Rakesh Kumar Singh1  | |
[1] Laboratory of Information Photonics and Optical Metrology, Department of Physics, Indian Institute of Technology ,(Banaras Hindu University);Department of Electrical and Electronic Engineering, Niigata University | |
关键词: vortex beam; speckle; coherence; phase imaging; | |
DOI : 10.3390/HMAM2-14273 | |
来源: mdpi | |
【 摘 要 】
Phase loss is a typical problem in the optical domain, and optical detectors only measure the amplitude distribution of a signal without its phase. However, an optimal phase is desired in a variety of practical applications, such as optical metrology, nondestructive testing, and quantitative microscopy. Several methods have been proposed to quantitatively measure phase, among which interferometry is one of the most commonly used. An intensity interferometer has also been used to recover phase and enhance the phase difference measurement via the intensity correlation. In this paper, we present and examine another technique based on the Stokes correlation for enhancing phase measurement by a factor of two. The enhancement in phase measurement is accomplished through an evaluation of the correlation between two points of Stokes fluctuations of randomly scattered light and by recovering the enhanced phase of the object by using three-step phase shifting along with the Stokes correlations. This technique is expected to be useful for imaging and the experimental measurement of the phase of a weak signal.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO202307010005100ZK.pdf | 1281KB | download |