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dc.contributor.authorChen, Y. F.en_US
dc.contributor.authorChang, C. C.en_US
dc.contributor.authorLee, C. Y.en_US
dc.contributor.authorSung, C. L.en_US
dc.contributor.authorTung, J. C.en_US
dc.contributor.authorSu, K. W.en_US
dc.contributor.authorLiang, H. C.en_US
dc.contributor.authorChen, W. D.en_US
dc.contributor.authorZhang, G.en_US
dc.date.accessioned2018-08-21T05:53:01Z-
dc.date.available2018-08-21T05:53:01Z-
dc.date.issued2017-12-01en_US
dc.identifier.issn2327-9125en_US
dc.identifier.urihttp://dx.doi.org/10.1364/PRJ.5.000561en_US
dc.identifier.urihttp://hdl.handle.net/11536/144165-
dc.description.abstractThe criterion of achieving efficient passive Q-switching is analyzed to design an off-axis pumped Nd:YVO4/Cr4+ : YAG laser with a degenerate cavity. Experimental results reveal that pure high-order HG(0,m) or HG(m,0) eigenmodes with the order m between 0 and 14 can be generated, depending on the off-axis displacement along the y axis or the x axis. On the other hand, lasing modes naturally turn into planar geometric modes when the off- axis displacement is larger than the value for exciting the HG(0,m) or HG(m,0) eigenmodes with m > 14. The overall peak powers for high- order eigenmodes or geometric modes can exceed 140 W. Furthermore, the high- order eigenmodes and geometric modes are employed to generate vortex beams with large orbital angular momentum by using an external cylindrical mode converter. Theoretical analyses are performed to confirm experimental results and to manifest the phase structures of the generated vortex beams. (C) 2017 Chinese Laser Pressen_US
dc.language.isoen_USen_US
dc.titleHigh-peak-power large-angular-momentum beams generated from passively Q-switched geometric modes with astigmatic transformationen_US
dc.typeArticleen_US
dc.identifier.doi10.1364/PRJ.5.000561en_US
dc.identifier.journalPHOTONICS RESEARCHen_US
dc.citation.volume5en_US
dc.citation.spage561en_US
dc.citation.epage566en_US
dc.contributor.department電子物理學系zh_TW
dc.contributor.departmentDepartment of Electrophysicsen_US
dc.identifier.wosnumberWOS:000416860400015en_US
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