Prediction and characterisation of intensity noise of ultrafast fiber amplifiers and low noise vibrometer for biological applications

dc.contributor.advisorİlday, F. Ömer
dc.contributor.authorGürel, Kutan
dc.departmentDepartment of Physicsen_US
dc.descriptionAnkara : The Department of Physics and the Graduate School of Engineering and Science of Bilkent University, 2013.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2013.en_US
dc.descriptionIncludes bibliographical references leaves 37-41.en_US
dc.description.abstractWe report on the experimental characterisation and theoretical prediction of intensity fluctuations for ultrafast fibre amplifiers. We formulate a theoretical model with which the intensity noise of a Yb-doped fiber amplifier can be predicted with high accuracy, taking into account seed and pump noise, as well as generation of amplified spontaneous emission. Transfer of pump and seed signal modulations to the amplified output during fibre amplification is investigated thoroughly. Our model enables design and optimisation of fiber amplifiers with regards to their intensity noise performance. As a route to passively decreasing the noise imparted by multi-mode diodes in cladding-pumped amplifiers, we evaluate the impact of using multiple, low-power pump diodes versus a single, high-power diode in terms of the noise performance. We use this gathered intuition on intensity noise to build a low noise fibre interferometer that is able to detect sub-5 nm vibrations for biological experiments.en_US
dc.description.statementofresponsibilityGürel, Kutanen_US
dc.format.extentix, 49 leaves, illustrations, graphicsen_US
dc.publisherBilkent Universityen_US
dc.subjectFiber laseren_US
dc.subjectFiber amplifieren_US
dc.subjectRelative intensity noiseen_US
dc.subjectNoise transfer functionen_US
dc.subject.lccTA1695.5 .G87 2013en_US
dc.subject.lcshHigh power lasers.en_US
dc.subject.lcshFiber optics.en_US
dc.subject.lcshOptical fibers.en_US
dc.subject.lcshOptical amplifiers.en_US
dc.titlePrediction and characterisation of intensity noise of ultrafast fiber amplifiers and low noise vibrometer for biological applicationsen_US
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