3D features of modified photostructurable glass–ceramic with infrared femtosecond laser pulses

Fernández-Pradas, J.M.; Serrano, D.; Bosch, Salvador; Morenza, J.L.; Serra, P.

doi:10.1016/j.apsusc.2010.11.008

Cited by 9 publications

(2 citation statements)

References 19 publications

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“…Recently, femtosecond laser systems of around 1 mm wavelength based on fibers, Yb:YAG, Yb:KGW, Yb:KYW, have become more widely used. 43,44 Typically, FsLDW induced latent imaging followed by an etching process, here called subtraction-type FsLDW, has been widely used for micromachining; this technique shows many unique advantages. First, the ultrafast pulse ranging from tens to hundreds of femtoseconds can effectively suppress the heat-affected zone in the laser scanning region, because the energy deposition generally occurs on a timescale that is much shorter than that of other relaxation processes.…”

Section: Fundamental Principles Of Femtosecond Laser Direct Writing (...mentioning

confidence: 99%

Fabrication and multifunction integration of microfluidic chips by femtosecond laser direct writing

et al. 2013

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In the pursuit of modern microfluidic chips with multifunction integration, micronanofabrication techniques play an increasingly important role. Despite the fact that conventional fabrication approaches such as lithography, imprinting and soft lithography have been widely used for the preparation of microfluidic chips, it is still challenging to achieve complex microfluidic chips with multifunction integration. Therefore, novel micronanofabrication approaches that could be used to achieve this end are highly desired. As a powerful 3D processing tool, femtosecond laser fabrication shows great potential to endow general microfluidic chips with multifunctional units. In this review, we briefly introduce the fundamental principles of femtosecond laser micronanofabrication. With the help of laser techniques, both the preparation and functionalization of advanced microfluidic chips are summarized. Finally, the current challenges and future perspective of this dynamic field are discussed based on our own opinion.

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Section: Fundamental Principles Of Femtosecond Laser Direct Writing (...mentioning

confidence: 99%

Fabrication and multifunction integration of microfluidic chips by femtosecond laser direct writing

et al. 2013

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“…grating) [4] , but also three-dimensional (3D, such as photonic crystal) [5] . In metals [6] , ceramics [7] , and other opaque materials [8,9] , FLDW can write 2D microstructures onto the surface of such materials. The microstructures can be fabricated, not only by scanning point by point, but also by the interference between femtosecond pulses and the substrate [10] .…”

mentioning

confidence: 99%

Fabrication of magneto-optical microstructure by femtosecond laser pulses

Li¹,

Gao²,

Jiang³

et al. 2012

中国光学快报

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We investigate femtosecond laser direct writing (FLDW) in the fabrication of magneto-optical (MO) microstructures. The experimental results show that FDLW can introduce positive refractive index change in the MO materials. With the increase of the writing intensity of femtosecond laser pulses, refractive index change increases, whereas Verdet constant of the damaged area decreases nonlinearly. With suitable writing intensity, we obtain a single-mode waveguide in which Verdet constant is 80% of the bulk MO glass.OCIS codes: 220.4000, 140.7090. doi: 10.3788/COL201210.102201.Femtosecond laser direct writing (FLDW) is a powerful tool for fabricating optical microstructures [1] , which is localized at the focus of incident pulse for the ultrahigh peak power and ultrashort pulse duration of the femtosecond pulse. With the help of nonlinear optical effects, such as multiphoton absorption, the spatial size of the optical microstructures written by the femtosecond pulses can be less than tens nanometers [2] . FLDW can be used to write optical microstructures in nearly all kinds of materials.In transparent medias, such as glass and polymer, the microstructures fabricated by FLDW can be not only onedimensional (e.g., waveguide)[3] or two-dimensional (2D, e.g. grating)[4] , but also three-dimensional (3D, such as photonic crystal) [5] . In metals [6] , ceramics [7] , and other opaque materials [8,9] , FLDW can write 2D microstructures onto the surface of such materials. The microstructures can be fabricated, not only by scanning point by point, but also by the interference between femtosecond pulses and the substrate [10] . In FLDW, femtosecond pulses introduce the change of refractive index and/or absorption coefficient into the substrates, thereby fabricating optical microstructures. Many works have been carried out to optimize the characters of FLDW, such as improving the spatial resolution of the microstructures [11] and increasing writing speed [12] . However, femtosecond pulses may also change the optical nonlinear effect of the substrate, such as the electrooptical effect in lithium niobate crystal [13] . In this letter, we studied the influence of femtosecond pulses on the nonlinearity in the magneto-optical (MO) glass. Our results showed that, in MO glass, the Verdet constant and the refractive index changed nonlinearly with the writing intensity of femtosecond laser. With FLDW, a singlemode waveguide with Verdet constant higher than 80% of the bulk glass was fabricated successfully.In our experiments, the MO glass is TG 20 (Tb 2 O 3 -SiO 2 -Al 2 O 3 -B 2 O 3 ) from Shanghai Daheng Company with a refractive index of n d =1.69 and Abbe's number of 53.14. The size of the sample is 7.2×11.7×14.4 (mm).All of the six glass surfaces are polished for the convenience of writing and real-time monitoring.The experimental setup is schematically shown in Fig. 1. Linearly polarized femtosecond pulses from an amplified Ti:Sapphire laser are focused onto the MO glass by a 20× microscopy objective lens (LMPLanFL, Olympus Company)...

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Picosecond laser fabrication of microchannels inside Foturan glass at CO2 laser irradiation and following etching

et al. 2016

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3D features of modified photostructurable glass–ceramic with infrared femtosecond laser pulses

Cited by 9 publications

References 19 publications

Fabrication and multifunction integration of microfluidic chips by femtosecond laser direct writing

Fabrication and multifunction integration of microfluidic chips by femtosecond laser direct writing

Fabrication of magneto-optical microstructure by femtosecond laser pulses

Picosecond laser fabrication of microchannels inside Foturan glass at CO2 laser irradiation and following etching

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