Controlled generation of vortex and vortex dipole from a Gaussian pumped optical parametric oscillator

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dc.contributor.author Sharma, Varun
dc.contributor.author Aadhi, A.
dc.contributor.author Samanta, Goutam Kumar
dc.date.accessioned 2019-07-16T09:58:27Z
dc.date.available 2019-07-16T09:58:27Z
dc.date.issued 2019-06
dc.identifier.citation Sharma, Varun; Aadhi, A. and Samanta, G. K., �Controlled generation of vortex and vortex dipole from a Gaussian pumped optical parametric oscillator�, Optics Express, DOI: 10.1364/OE.27.018123, vol. 27, no. 13, pp. 18123-18130, Jun. 2019. en_US
dc.identifier.issn 1094-4087
dc.identifier.uri https://doi.org/10.1364/OE.27.018123
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/4613
dc.description.abstract We report on direct generation of optical vortices from a continuous-wave (cw), Gaussian beam pumped doubly resonating optical parametric oscillator (DRO). Using a 30-mm long MgO doped periodically poled lithium tantalate (MgO:sPPLT) crystal based DRO, pumped in the green by a frequency-doubled Yb-fiber laser in Gaussian spatial profile we have generated signal and idler beams in vortex mode of order,�l�= 1, tunable across 970-1178 nm. Controlling the overlap between the Gaussian pump beam with the fundamental cavity mode of the resonant signal and idler beams of the DRO through the tilt of the pump beam and/or the cavity mirror in transverse plane, we have generated both signal and idler beams in vortex and vortex dipole spatial profiles. Using the theoretical formalism for the vortex beam generation through the superposition of two Gaussian beams we have numerically calculated the spatial profile of the generated beam in close agreement with our experiment results. The generic experimental scheme can be used to generate optical vortex across the electromagnetic spectrum and in all time scales (cw to ultrafast) using suitable OPO.
dc.description.statementofresponsibility by Varun Sharma, A. Aadhi and G. K. Samanta
dc.format.extent vol. 27, no. 13, pp. 18123-18130
dc.language.iso en en_US
dc.publisher OSA Publishing en_US
dc.title Controlled generation of vortex and vortex dipole from a Gaussian pumped optical parametric oscillator en_US
dc.type Article en_US
dc.relation.journal Optics Express


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