Abstract
A modified lateral shearing interferometry is proposed to measure the spatial coherence of partially coherent light beams. This interferometry based on a system consists of a diffraction grating and a spatial light modulator (SLM). In this system, the diffraction grating splits the partially coherent wave into two copied waves, forming a shearing interferogram on the observation plane. The period of the composite blazing grating generated by the phase-modulated SLM is flexibly tuned for controlling the lateral displacement of the two copied waves. The complex degree of spatial coherence of the partially coherent field is obtained through measurements and Fourier analysis of the fringe pattern.
© 2018 Optical Society of America
Full Article | PDF ArticleMore Like This
Vanusch Nercissian, Irina Harder, Klaus Mantel, Andreas Berger, Gerd Leuchs, Norbert Lindlein, and Johannes Schwider
Appl. Opt. 50(4) 571-578 (2011)
Mikael Sjodahl and Eynas Amer
Appl. Opt. 57(14) 3645-3652 (2018)
Y. Pavan Kumar and Sanjib Chatterjee
Appl. Opt. 50(10) 1350-1355 (2011)