In this paper, we make use of optically controlled phase sampling methods with the use of a dual beam optical trapping system. The dual beam trap enables us to remotely position a single birefringent particle and a second silica microsphere to form a Young's slits type experiments. The controlled rotation of the birefringent particle means that it acts as both a micro-diffuser and diffracting aperture at the same time. By observing the visibility of the far-field interference fringes, we were measure the relative mutual coherence of the optical field between any two selected point sources. This technique provides us with a unique localized sampling method.

Date Published: 12 September 2007
PDF: 8 pages
Proc. SPIE 6644, Optical Trapping and Optical Micromanipulation IV, 66440Y (12 September 2007); doi: 10.1117/12.734131

Published in SPIE Proceedings Vol. 6644:
Optical Trapping and Optical Micromanipulation IV
Kishan Dholakia; Gabriel C. Spalding, Editor(s)