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dc.contributor.advisorAytür, Orhan
dc.contributor.authorFigen, Ziya Gürkan
dc.date.accessioned2016-01-08T20:19:44Z
dc.date.available2016-01-08T20:19:44Z
dc.date.issued2005
dc.identifier.urihttp://hdl.handle.net/11693/18483
dc.descriptionAnkara : The Department of Electrical and Electronics Engineering and the Institute of Engineering and Science of Bilkent University, 2005.en_US
dc.descriptionThesis (Ph. D.) -- Bilkent University, 2005.en_US
dc.descriptionIncludes bibliographical references leaves 122-143.en_US
dc.description.abstractIn this thesis, we demonstrate a technique for highly efficient red beam generation using nanosecond upconversion optical parametric oscillators based on KTiOAsO4 crystals that are simultaneously phase matched for optical parametric generation and sum-frequency generation. Pumped at a wavelength of 1064 nm by a Qswitched Nd:YAG laser, these devices produce red output beams at 627 nm with 1064-nm-to-627-nm energy conversion efficiencies reaching 20% for the singlepass pumping and 30% for the double-pass pumping. Our devices are simpler in architecture compared to other devices converting nanosecond Nd:YAG laser radiation into red wavelengths. A typical nanosecond upconversion optical parametric oscillator is comprised of three cavity mirrors which are all high reflectors at the signal wavelength (1525 nm), a 2-cm-long KTiOAsO4 crystal, and an intracavity retarder plate for rotating the polarization of the signal beam. The total cavity length is under 5 cm. With its small size, the device can be shaped into a module to be placed in front of Nd:YAG lasers for highly efficient red beam generation. The single-pass sum-frequency generating optical parametric oscillator is the first demonstration of a nanosecond optical parametric oscillator using simultaneous phase matching. We have fully characterized these devices in terms of their energy output as functions of polarization rotation angle and input pump energy, time profiles, spatial beam profiles, and spectra of the output. In this thesis, we also present our work on modelling continuous-wave intracavity optical parametric oscillators.en_US
dc.description.statementofresponsibilityFigen, Ziya Gürkanen_US
dc.format.extentxvi, 143 leavesen_US
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectNonlinear frequency conversionen_US
dc.subjectOptical parametric oscillatorsen_US
dc.subjectSumfrequency generationen_US
dc.subjectSimultaneous phase matchingen_US
dc.subjectQ-switched Nd:YAG laseren_US
dc.subjectRed beam generationen_US
dc.subjectModelling continuous-wave intracavity optical parametric oscillatorsen_US
dc.subject.lccTK7872.O7 F54 2005en_US
dc.subject.lcshOscillators, Electric.en_US
dc.subject.lcshParametric devices.en_US
dc.titleNanosecond upconversion optical parametric oscillatorsen_US
dc.typeThesisen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.publisherBilkent Universityen_US
dc.description.degreePh.D.en_US


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