Frequency-Doubling of Femtosecond Pulses in “Thick” Nonlinear Crystals With Different Temporal and Spatial Walk-Off Parameters

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To access the full text documents, please follow this link: http://hdl.handle.net/2117/100864

dc.contributor	Universitat Politècnica de Catalunya. Institut de Ciències Fotòniques
dc.contributor.author	Apurv Chaitanya, N.
dc.contributor.author	Aadhi, A.
dc.contributor.author	Chaitanya Kumar, S.
dc.contributor.author	Jabir, M. V.
dc.contributor.author	Samanta, G. K.
dc.contributor.author	Ebrahim-Zadeh, M.
dc.date	2016-12-01
dc.identifier.citation	Apurv Chaitanya, N. [et al.]. Frequency-Doubling of Femtosecond Pulses in “Thick” Nonlinear Crystals With Different Temporal and Spatial Walk-Off Parameters. "IEEE Photonics Journal", 1 Desembre 2016, vol. 8, núm. 6.
dc.identifier.citation	1943-065
dc.identifier.uri	http://hdl.handle.net/2117/100864
dc.language.iso	eng
dc.publisher	IEEE
dc.relation	http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7738466
dc.rights	Attribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights	info:eu-repo/semantics/openAccess
dc.rights	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject	Àrees temàtiques de la UPC::Física
dc.subject	Nonlinear optics
dc.subject	nonliear optics
dc.subject	Òptica no lineal
dc.title	Frequency-Doubling of Femtosecond Pulses in “Thick” Nonlinear Crystals With Different Temporal and Spatial Walk-Off Parameters
dc.type	info:eu-repo/semantics/submittedVersion
dc.type	info:eu-repo/semantics/article
dc.description.abstract	We present a comparative study on frequency-doubling characteristics of femtosecond laser pulses in thick nonlinear crystals with different temporal and spatial walk-off parameters. Using single-pass second harmonic generation (SHG) of 260 fs pulses at 1064 nm from a high-average-power femtosecond Yb-fiber laser in 5-mm-long crystals of β-BaB2O4 (BBO) and BiB3O6 (BIBO), we find that for comparable values of temporal and spatial walk-off parameters in each crystal, the optimum focusing condition for SHG is more strongly influenced by spatial walk-off than temporal walk-off. It is also observed that under such conditions, the Boyd and Kleinman theory commonly used to define the optimum focusing condition for frequency-doubling of cw and long-pulse lasers is also valid for SHG of ultrafast lasers. We also investigate the effect of focusing on the spectral, temporal, and spatial characteristics of the second harmonic (SH) radiation, as well as angular acceptance bandwidth for the SHG process, under different temporal and spatial walk-off conditions in the two crystals
dc.description.abstract	Peer Reviewed

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