Pearl-chain waveguides written at megahertz repetition rate

Graf, Roswitha; Fernández, A.; Dubov, Mykhaylo; Brueckner, H.J.; Chichkov, Boris N.; Apolonski, Alexander

doi:10.1007/s00340-006-2480-y

Cited by 55 publications

(30 citation statements)

References 27 publications

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“…The observed local variation of glass composition can be explained in terms of elements migration (apart a smaller increase in Li concentration below the focal region -in the direction of light propagation). Note that such a peculiarities in materials modification along the laser beam have been observed by a number of research groups [8,10,19]. Fs laser irradiation in HRR regime induces strong local heating of the material, up to 1000 ÷ 2000 • C [10,11,19].…”

Section: Sem and Edx Analysismentioning

confidence: 69%

“…Note that such a peculiarities in materials modification along the laser beam have been observed by a number of research groups [8,10,19]. Fs laser irradiation in HRR regime induces strong local heating of the material, up to 1000 ÷ 2000 • C [10,11,19]. As the studied phosphate glass has T g about 520 • C, the laser affected zone can be considered as melt where chemical compounds are thermally dissociated to ions and/or ions associates.…”

Section: Sem and Edx Analysismentioning

confidence: 70%

“…Wider spectra seem to be problematic due to limitations imposed by saturable Bragg reflector (SBR) mirror in commercial versions. Without the SBR the same system produces 26 fs pulses with more than twice larger output energy [18,19]. Because of the bandwidth and moderate pulse energy both beam delivery and attenuation optics have to be carefully designed to avoid losses and temporal pulse broadening.…”

Section: Laser System and Femtosecond Inscriptionmentioning

confidence: 99%

“…3(a). The observed bands correlate with specific vibrations associated with Nb-O bonds and structural units of phosphate glass matrix [15][16][17][18][19]. The low-wave number peaks at 600 cm −1 and below are assigned to network vibrations [13].…”

Section: Raman Spectroscopymentioning

confidence: 99%

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Waveguide fabrication in lithium-niobo-phosphate glasses by high repetition rate femtosecond laser: route to non-equilibrium material’s states

Dubov

Mezentsev

Manshina

et al. 2014

Opt. Mater. Express

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Abstract:We study waveguide fabrication in lithium-niobo-phosphate glass, aiming at a practical method of single-stage fabrication of nonlinear integrated-optics devices. We observed chemical transformations or material redistribution during the course of high repetition rate femtosecond laser inscription. We believe that the laser-induced ultrafast heating and cooling followed by elements diffusion on a microscopic scale opens the way toward the engineering non-equilibrium sates of matter and thus can further enhance Refractive Index (RI) contrasts by virtue of changing glass composition in and around the fs tracks. References and links1. H. Misawa and S. Juodkazis, eds., 3D Laser Microfabrication. Principles and Applications (Wiley-VCH, Weinheim, 2006). 2. R. Osellame, G. Cerullo, and R. Ramponi, Femtosecond Laser Micromachining: Photonic and Microfluidic Devices in Transparent Materials, SpringerLink : Bücher (Springer Berlin Heidelberg, 2012).

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Section: Sem and Edx Analysismentioning

confidence: 69%

Section: Sem and Edx Analysismentioning

confidence: 70%

Section: Laser System and Femtosecond Inscriptionmentioning

confidence: 99%

Section: Raman Spectroscopymentioning

confidence: 99%

See 2 more Smart Citations

Waveguide fabrication in lithium-niobo-phosphate glasses by high repetition rate femtosecond laser: route to non-equilibrium material’s states

Dubov

Mezentsev

Manshina

et al. 2014

Opt. Mater. Express

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“…Overall, the optical microfabrication system used enables on-target pulse energies of up to 75 nJ. Without the SBR, the same system produces 26 fs pulses with more than twice the output energy [20,21]. Several microscope objective lenses were used to produce index modifications in the LiNbO 3 crystal.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Microstructured waveguides in z-cut LiNbO_3 by high-repetition rate direct femtosecond laser inscription

Dubov

Boscolo

Webb

2014

Opt. Mater. Express

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Abstract:We report on the operational parameters that are required to fabricate buried, microstructured waveguides in a z-cut lithium niobate crystal by the method of direct femtosecond laser inscription using a highrepetition-rate, chirped-pulse oscillator system. Refractive index contrasts as high as −0.0127 have been achieved for individual modification tracks. The results pave the way for developing microstructured WGs with low-loss operation across a wide spectral range, extending into the mid-infrared region up to the end of the transparency range of the host material.

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Continuum Models of Ultrashort Laser–Matter Interaction in Application to Wide-Bandgap Dielectrics

Bulgakova

Zhukov

2014

Lasers in Materials Science

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Pearl-chain waveguides written at megahertz repetition rate

Cited by 55 publications

References 27 publications

Waveguide fabrication in lithium-niobo-phosphate glasses by high repetition rate femtosecond laser: route to non-equilibrium material’s states

Waveguide fabrication in lithium-niobo-phosphate glasses by high repetition rate femtosecond laser: route to non-equilibrium material’s states

Microstructured waveguides in z-cut LiNbO_3 by high-repetition rate direct femtosecond laser inscription

Continuum Models of Ultrashort Laser–Matter Interaction in Application to Wide-Bandgap Dielectrics

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