Efficiency of the second-harmonic generation with the zeroth-order bessel-profile beams in uniaxial crystals

Nguyen, Lam Thanh; Le, Anh Quynh; Phan, Vinh Trung; Thi, Kieu Loan Phan

doi:10.1007/s10946-012-9316-5

Cited by 2 publications

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“…7 For high harmonic generation (HHG), the promising phase-matching benefits of BG beams over Gaussian focal profiles come from the distinction between the on-axis phase front velocity and the prolonged intensity profile that BG beams are capable of achieving. 7,8 Higher-order optical nonlinearities can also be used to quadruple the frequency of a laser source. 9 However, in this scenario, the energy conversion efficiency has not yet exceeded 10 −6 .…”

Section: Introductionmentioning

confidence: 99%

“…Over the past few decades, high-harmonic and attosecond science has made significant progress toward the goal of determining the best possible circumstances for phase matching 7 . For high harmonic generation (HHG), the promising phase-matching benefits of BG beams over Gaussian focal profiles come from the distinction between the on-axis phase front velocity and the prolonged intensity profile that BG beams are capable of achieving 7 , 8 …”

Section: Introductionmentioning

confidence: 99%

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Wave theory-based fourth harmonic generation of Bessel–Gauss beam by total internal reflection-quasi phase matching in a rectangular slab of beta barium borate

Saha

Deb

2022

Opt. Eng.

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This work presents a theoretical approach to a highly multimode-guided wave-based fourth harmonic (FH) generation method by exploiting a zero-order Bessel-Gauss beam through the total internal reflection quasi phase-matching technique. An anisotropic crystal featuring a rectangular structure of beta barium borate has been used to carry out this analysis. In contrast to the conventional frequency conversion scheme using a Gaussian beam, the projected scheme yields a maximum six times superior efficiency of 6.9547% in a crystal length of nearly 6.3 mm, corresponding to a 266-nm FH wavelength. The analysis has also taken into account optical losses, such as absorption, Goos-Hänchen-shift, surface roughness, and the effect of the nonlinear law of reflection. Finally, a systematic study has been performed to describe the influence of parametric modification, such as variations in slab length and thickness, to provide a more comprehensive picture of the overall analysis.

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