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dc.contributor.authorFigen, Z. G.en_US
dc.contributor.authorAytür, O.en_US
dc.contributor.authorArıkan, O.en_US
dc.date.accessioned2018-04-12T10:59:52Z
dc.date.available2018-04-12T10:59:52Z
dc.date.issued2016en_US
dc.identifier.issn1559-128X
dc.identifier.urihttp://hdl.handle.net/11693/37008
dc.description.abstractIn this paper, we design aperiodic gratings based on orientation-patterned gallium arsenide (OP-GaAs) for converting 2.1 μm pump laser radiation into long-wave infrared (8-12 μm) in an idler-efficiency-enhanced scheme. These single OP-GaAs gratings placed in an optical parametric oscillator (OPO) or an optical parametric generator (OPG) can simultaneously phase match two optical parametric amplification (OPA) processes, OPA 1 and OPA 2. We use two design methods that allow simultaneous phase matching of two arbitrary χ 2 processes and also free adjustment of their relative strength. The first aperiodic grating design method (Method 1) relies on generating a grating structure that has domain walls located at the zeros of the summation of two cosine functions, each of which has a spatial frequency that equals one of the phase-mismatch terms of the two processes. Some of the domain walls are discarded considering the minimum domain length that is achievable in the production process. In this paper, we propose a second design method (Method 2) that relies on discretizing the crystal length with sample lengths that are much smaller than the minimum domain length and testing each sample's contribution in such a way that the sign of the nonlinearity maximizes the magnitude sum of the real and imaginary parts of the Fourier transform of the grating function at the relevant phase mismatches. Method 2 produces a similar performance as Method 1 in terms of the maximization of the height of either Fourier peak located at the relevant phase mismatch while allowing an adjustable relative height for the two peaks. To our knowledge, this is the first time that aperiodic OP-GaAs gratings have been proposed for efficient long-wave infrared beam generation based on simultaneous phase matching.en_US
dc.language.isoEnglishen_US
dc.source.titleApplied Opticsen_US
dc.relation.isversionofhttp://dx.doi.org/10.1364/AO.55.002404en_US
dc.subjectCosine transformsen_US
dc.subjectDesignen_US
dc.subjectDomain wallsen_US
dc.subjectEfficiencyen_US
dc.subjectGallium arsenideen_US
dc.subjectInfrared devicesen_US
dc.subjectInfrared radiationen_US
dc.subjectOptical frequency conversionen_US
dc.subjectOptical parametric oscillatorsen_US
dc.subjectParametric oscillatorsen_US
dc.subjectPhase matchingen_US
dc.subjectPumping (laser)en_US
dc.subjectSemiconducting galliumen_US
dc.subjectGrating structuresen_US
dc.subjectLong wave infrareden_US
dc.subjectOptical parametric amplificationen_US
dc.subjectOptical parametric generatoren_US
dc.subjectProduction processen_US
dc.subjectPump laser radiationen_US
dc.subjectReal and imaginaryen_US
dc.subjectRelative strengthen_US
dc.subjectOptical parametric amplifiersen_US
dc.titleIdler-efficiency-enhanced long-wave infrared beam generation using aperiodic orientation-patterned GaAs gratingsen_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.citation.spage2404en_US
dc.citation.epage2412en_US
dc.citation.volumeNumber55en_US
dc.citation.issueNumber9en_US
dc.identifier.doi10.1364/AO.55.002404en_US
dc.publisherOptical Society of Americaen_US


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