Print Email Facebook Twitter Optical frequency shifting using (electro-optic) rotating wave-plates and its application in heterodyne displacement interferometry Title Optical frequency shifting using (electro-optic) rotating wave-plates and its application in heterodyne displacement interferometry Author Van der Niet, R.T. Contributor Meskers, A.J.H. (mentor) Faculty Mechanical, Maritime and Materials Engineering Department Precision and Microsystems Engineering Programme Mechatronic System Design Date 2015-09-09 Abstract The generation of a split-frequency is inherent to heterodyne displacement interferometry. Currently this split-frequency is predominantly generated by either acousto-optic modulators (AOM), Zeeman-lasers (ZL), or a combination. Both techniques have their drawbacks, e.g. AOM have a limited bandwidth and are optically inefficient due to a loss of optical power in various unused diffraction orders. Whereas the optical output power of a Zeeman-laser decreases rapidly as the split frequency is increased. This publication presents a third method to generate split-frequencies for heterodyne displacement interferometry, making use of an electro-optic rotating quarter wave-plate. Using this technique, the split-frequency is tunable, optical power is preserved, and the technique has potential to generate split-frequencies of several MHz. Moreover, this publication contains a complete review of frequency-modulation using rotating mechanical- and electro-optic wave-plates. The rotating electro-optic quarter wave-plate is implemented in a heterodyne displacement interferometer and compared to state-of-the-art split-frequency generation techniques in terms of periodic non-linearity (PNL). Experimental results showed a first order PNL of 2.7nm obtained with the presented electro-optic split-frequency generator, in contrast to 1.6nm and 0.18nm for the ZL and AOM respectively. Subject heterodyne displacement interferometryperiodic non-linearity (PNL)rotating wave-plateoptical frequency shiftinglithium niobateelectro-optic effectsingle-sideband suppressed carrier To reference this document use: http://resolver.tudelft.nl/uuid:83955e69-3fd1-4e96-bb32-9772d5a6c207 Embargo date 2017-08-28 Part of collection Student theses Document type master thesis Rights (c) 2015 Van der Niet, R.T. Files PDF Eindverslag_-_Ruud_van_der_Niet.pdf 17.68 MB Close viewer /islandora/object/uuid:83955e69-3fd1-4e96-bb32-9772d5a6c207/datastream/OBJ/view