Optical Phase Shift Measurements in Interferometry

dc.contributor.author	Nyakang'o, O.E.
dc.contributor.author	Karimi, P. M.
dc.contributor.author	Rurimo, G.K.
dc.date.accessioned	2013-12-30T08:29:09Z
dc.date.available	2013-12-30T08:29:09Z
dc.date.issued	2013
dc.description.abstract	The precision and accuracy of optical phase-shifting technique is critical and affects the accuracy of the measurements undertaken using phase-shifting interferometers. The accuracy of optical phase shifters is limited by the inherent characteristics of the piezo-actuators (or PZT) such as nonlinearities, hysteresis, creep and thermal drift. This paper explores a new phase-shifting technique based on two acousto-optic modulators (AOMs) where the inherent characteristics of the PZT do not affect the required phase-shifts. The acousto-optic phase-shifting technique was successfully applied to control and measure the required optical phase shifts directly in the Mach-Zehnderinterferometer. This was accomplished by varying the phase delays between the two AOMs driving signals. In the experiment both Dual Trace and Lissajous Figures techniques were used to determine the behavior of the optical phase shifting system in terms of accuracy and repeatability.	en_US
dc.identifier.uri	http://ir-library.ku.ac.ke/handle/123456789/8272
dc.language.iso	en	en_US
dc.publisher	Scientific & Academic Publishing.	en_US
dc.subject	Optical phase-shift	en_US
dc.subject	Phase delay	en_US
dc.subject	Interferometers	en_US
dc.title	Optical Phase Shift Measurements in Interferometry	en_US
dc.type	Article	en_US

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