Influence of non-stoichiometric defects on nonlinear absorption and refraction in Nd:Zn co-doped lithium niobate

Reddy, J.N. Babu; Elizabeth, Suja; Bhat, H. L.; Nalla, Venkatram; Rao, D. Narayana

doi:10.1016/j.optmat.2008.11.013

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…As it can be seen, the three susceptibilities are significantly different from each other, conforming to the orthorhombic crystal system with space group Cmc2 1 ͑Ref. 21͒ for BaMgF 4 which has the indepen- 23 To further show the large n 2 of BaMgF 4 , the supercontinuum spectra of BaMgF 4 and LiNbO 3 are obtained and shown in Fig. 4.…”

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confidence: 88%

Femtosecond Z-scan measurement of third-order nonlinear refractive indices of BaMgF4

Chen

et al. 2011

Applied Physics Letters

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The BaMgF 4 single crystal is grown by Bridgman method. The third-order nonlinear refractive indices along three crystallographic axes are determined by Z-scan technique with femtosecond laser. The largest one that has a value of 2.35ϫ 10 −18 m 2 / W is along the c-axis and the corresponding third-order nonlinear susceptibility is 1.24ϫ 10 −12 esu. This value is compared with LiNbO 3 through self-phase modulation effect. Furthermore, the mechanism and the possible applications of the relatively large third-order nonlinear refractive indices are also discussed at last.

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confidence: 88%

Femtosecond Z-scan measurement of third-order nonlinear refractive indices of BaMgF4

Chen

et al. 2011

Applied Physics Letters

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“…Multiphoton absorption of a laser beam at the focal point leads to the local temperature being increased rapidly [111,112]. Consequently, the temperature gradient within the laser focal region and the surrounding area results a 3D thermoelectric field.…”

Section: Primary Domain Inversionmentioning

confidence: 99%

“…Thus, it could be expressed as: I = I 0 G(x, y, x), where I 0 is a constant current, and G(x, y, z) is a 3D Gaussian function. Since LiNbO 3 crystal has strong absorption at 318 nm and the wavelength of the femtosecond laser utilized here is 800 nm, the nonlinear absorption is a three-photon process [111,112]. Thus, the generated heat is…”

Section: Primary Domain Inversionmentioning

confidence: 99%

A Brief Review on Nonlinear Photonic Crystals Induced by Direct Femtosecond Laser Writing

Tian

Yan

et al. 2023

Photonics

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Direct femtosecond laser writing or inscription is a useful technique, and it has been employed to engineer various materials in many applications including nonlinear photonic crystals, which are of periodically patterned second-order nonlinearity to get and control the coherent light at new frequencies. By manipulation of second-order nonlinearity, either erased or poled, quasi-phase matching has been achieved in several crystals, especially three-dimensional nonlinear photonic crystals have been originally proposed and proved to be truly three-dimensional. Here we shortly review on the recent advances in the research field of nonlinear photonic crystals inscribed by femtosecond laser, as well as look into the future in this field.

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“…Lithium niobate (LiNbO 3 , LN) is an extensively studied material for integrated optics and nonlinear optics due to its excellent electro-optical piezo-electric nonlinear properties. [18] Moreover, LiNbO 3 with balance of wide transparent range of wavelength, large band-gap (3.8 eV) [19] and third-order nonlinear refractive (𝑛 2 = 1.13 × 10 −19 m 2 /W at 800 nm) [20] provides prospective applications in the field of SC generation covering broad spectral region ranging from visible to mid-infrared. LiNbO 3 waveguide-based broadband SC generation has been realized in protonexchanged waveguides.…”

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confidence: 99%

Supercontinuum Generation in Lithium Niobate Ridge Waveguides Fabricated by Proton Exchange and Ion Beam Enhanced Etching

Xiang¹,

Wang²,

Ma³

et al. 2017

Chinese Phys. Lett.

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We report on the fabrication of the 10-mm-long lithium niobate ridge waveguide and its supercontinuum generation at near-visible wavelengths (around 800 nm). The waveguides are fabricated by a combination of MeV copper ion implantation followed by wet etching in a proton exchanged lithium niobate planar waveguide. Using a mode-locked Ti:sapphire laser with a central wavelength of 800 nm, the generated broadest supercontinuum through the ridge waveguides spans 302 nm (at −30 dB points), from 693 to 995 nm. Temporal coherence properties of the supercontinuum are experimentally studied by a Michelson interferometer and the coherence length of the broadest supercontinuum is measured to be 5.2μm. Our results offer potential for a compact and integrated supercontinuum source for applications including bio-imaging, spectroscopy and optical communication.

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Influence of non-stoichiometric defects on nonlinear absorption and refraction in Nd:Zn co-doped lithium niobate

Cited by 6 publications

References 21 publications

Femtosecond Z-scan measurement of third-order nonlinear refractive indices of BaMgF4

Femtosecond Z-scan measurement of third-order nonlinear refractive indices of BaMgF4

A Brief Review on Nonlinear Photonic Crystals Induced by Direct Femtosecond Laser Writing

Supercontinuum Generation in Lithium Niobate Ridge Waveguides Fabricated by Proton Exchange and Ion Beam Enhanced Etching

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