Optimization and characterization of femtosecond laser ...- optimization of femtosecond laser processing in liquids ,Optimization and characterization of femtosecond laser inscribed in-fiber microchannels for liquid sensing. Graham C.B. Lee, Chengbo Mou, Kaiming Zhou, ... an all femtosecond laser inscribed Fabry-Pérot-based refractometer with an R.I. sensitivity of 2.75 nm/RIU was also demonstrated. The Fabry-Pérot refractometer was formed by positioning a ...Femtosecond micromachining - Micro Processing - AmplitudeMicro Processing. Laser micro processing is based on a light-matter interaction process at a micro or submicron scale i.e. a removal of matter by laser focalization on a very small surface area (laser spot of a few hundreds of µm2). The femtosecond lasers developed by Amplitude for more than 10 years have made real progress in this field.



In-system optimization of hologram for holographic ...

We proposed a holographic laser processing system with the combination of femtosecond laser and the in-system optimization. Femtosecond laser processing that employ a computer-generated hologram (CGH) displayed on a liquid-crystal-on-silicon spatial light modulator (LCOS-SLM), called holographic femtosecond laser processing (HFLP). Due to the inherent …

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Designing “Supermetalphobic” Surfaces that ... - Wiley

Feb 05, 2020· It is demonstrated that the wettability of liquid metal (LM) on a substrate is very different from the water wettability. Superhydrophobic and superhydrophilic silicon and polydimethylsiloxane surfaces, respectively, are obtained by femtosecond laser processing and proper chemical modification.

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Optimization and characterization of femtosecond laser ...

May 22, 2014· Abstract. Optimization and characterization of femtosecond laser inscribed in- fiber microchannels for liquid sensing Graham C. B. Lee*, Chengbo Mou, Kaiming Zhou and Kate Sugden Aston Institute of Photonic Technologies, Aston University, Birmingham, UK ABSTRACT In-fiber microchannels were fabricated directly in standard single mode fiber using the …

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Effect of machining parameter on femtosecond laser ...

Nov 08, 2017· Due to the unique properties of femtosecond laser in precision machining, femtosecond laser was utilized for irradiation on SiC/SiC composites. Effects of different processing parameters, including the spot overlap ratio, helical line overlap ratio, laser processing power, as well as processing steps, were discussed in detail. The results …

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ORCID

Deep Subwavelength Laser-Induced Periodic Surface Structures on Silicon as a Novel Multifunctional Biosensing Platform. ACS Applied Materials & Interfaces. 2021-11-17 | Journal article. DOI: 10.1021/acsami.1c16249. Part of ISSN: 1944-8244. Part of ISSN: 1944-8252. Show more detail. Source : Evgeny Gurevich.

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Holographic femtosecond laser processing system with an ...

Dec 05, 2011· Holographic femtosecond laser processing is very useful for high-speed processing with low-loss of light. One of important subjects is to design a computer-generated hologram (CGH) with good performance in the processing system. We have proposed a CGH is optimized in the processing system. The latest method is the SH optimization method based …

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Tailored focal beam shaping and its application in laser ...

Nov 14, 2019· Reif, F. Costache, and M. Bestehorn, “ Self-organized surface nano-structuring by femtosecond laser processing,” in Recent Advances in Laser Processing of Materials, edited by J. Perriere, E. Millon, and E. Fogarassy (Elsevier, New York, 2006), pp. 275 The single spot experiments reveal that the LIPSS orientation is independent of the focal ...

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Pico- and Femtosecond Laser Micromachining for Surface ...

Sep 10, 2018· 1. Introduction. The laser technology for manufacturing is classified into two categories; e.g., thermal and athermal processings [].CO 2-laser with continuous power supply and fiber-lasers with use of short pulses are typical processing for welding, machining, and joining by formation of thermally hot spots [].Various fiber lasers [] have been developed and …

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Holographic Femtosecond Laser Processing with Multiplexed ...

Parallel femtosecond laser processing with a computer-generated hologram displayed on a spatial light modulator (SLM) is demonstrated. Use of the SLM enables performance of an arbitrary and variable patterning in laser processing. The hologram uses multiplexed phase Fresnel lenses (MPFLs) with features of independent tunability, three-dimensional (3D) …

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Ultrafast laser processing of materials: from science to ...

Mar 14, 2016· Here, we show that modern laser processing with ultrashort laser pulses can address this challenge from the resolution, productivity and …

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(PDF) Adaptive optimization in ultrafast laser material ...

Besides enormous scientific interest, the concept of adaptive optimization can have though significant practical implications, introducing novel concepts and potential in advanced laser material processing. While the laser energy delivery rate will be adaptively adjusted to the best coupling conditions, the materials themselves will start to ...

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Optimization and characterization of femtosecond laser ...

May 22, 2014· Abstract. Optimization and characterization of femtosecond laser inscribed in- fiber microchannels for liquid sensing Graham C. B. Lee*, Chengbo Mou, Kaiming Zhou and Kate Sugden Aston Institute of Photonic Technologies, Aston University, Birmingham, UK ABSTRACT In-fiber microchannels were fabricated directly in standard single mode fiber using the …

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Optimization of femtosecond laser processing in liquids

Figure 4: Spectrum of the white light generated in the 2-mm cuvette placed at different distances zf from the focus in water (left) and ethanol (right). Spectrum of the incident pulses is Gaussian centered by 800 nm, line width δλ = 60 nm; the spectrum corresponding to the white light is marked by shaded area below the measured data. - "Optimization of femtosecond laser …

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Optimization of femtosecond laser processing in liquids ...

In this paper we analyze femtosecond laser processing of metals in liquids searching for optimal conditions for predictable ablation. Incident laser pulses are stretched or compressed, self-focused and scattered on bubbles and on surface waves in the liquid environment. Influence of these effects on the laser intensity distribution on the target surface is discussed and …

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Optimization of femtosecond laser processing in liquids

Oct 24, 2018· In this paper we analyze femtosecond laser processing of metals in liquids searching for optimal conditions for predictable ablation. Incident laser pulses are stretched or compressed, self-focused and scattered on bubbles and on surface waves in the liquid environment. Influence of these effects on the laser intensity distribution on the target surface …

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(PDF) Aerodynamic Automobile Shape Optimization by ...

To enhance the functionality of microfluidic systems For laser polishing, C ­ O2 laser radiation with a wavelength by 3D microstructures, direct-laser writing or two-photon of λ = 10.6 µm is used because fused silica has a low optical polymerization (2PP) has been widely recognized as a valua- penetration depth of 4–30 µm (depending on ...

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Holographic femtosecond laser processing using optimal ...

Aug 01, 2007· Abstract. Holographic femtosecond laser processing performs high-speed parallel processing using a computer-generated hologram (CGH) displayed on a liquid crystal spatial light modulator. A critical issue is to precisely control the intensities of the diffraction peaks of the CGH. We propose a method of compensating for the spatial frequency ...

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Optimization of femtosecond laser processing of silicon ...

Surface processing of silicon using a 400-fs ytterbium fiber laser has been experimentally investigated. Processing was conducted using an average power of 20 W at laser repetition rates from 500 ...

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Hybrid laser precision engineering of transparent hard ...

Aug 05, 2021· A study on water-assisted femtosecond laser processing also shows that the ablation threshold of fused silica is reduced from 2.22 to 1.02 J/cm 2 with the assistance of distilled water 71. Removal ...

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Optimization and characterization of femtosecond laser ...

In-fiber microchannels were fabricated directly in standard single mode fiber using the femtosecond laser inscribe and etch technique. This method of creating in-fiber microchannels offers great versatility since it allows complex three dimensional structures to be inscribed and then etched with hydrofluoric acid.

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Femtosecond Laser Micromachining of Soda-Lime Glass in ...

May 29, 2019· Therefore, advantages of liquid-assisted processing is attracting much attention in laser micromachining applications. In this article, a femtosecond 1030 nm wavelength laser radiation was used to perform microprocessing of soda–lime glass in ambient air, in water-assisted environment, under KOH and under NaCl aqueous solutions.

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Femtosecond laser-based processing methods and their ...

Mar 01, 2021· 3.2. Parallel processing systems and methods. To make the fabrication of complex microstructures more efficient and flexible, various methods have been developed, including multi-focus parallel processing through optical modulation and diffraction, structured light, photolithography based on a digital micromirror deviced (DMD), and a liquid crystal …

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Optimization of femtosecond laser processing of silicon ...

Surface processing of silicon using a 400-fs ytterbium fiber laser has been experimentally investigated. Processing was conducted using an average power of 20 W at laser repetition rates from 500 ...

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Optimization of selective laser-induced etching (SLE) for ...

Oct 08, 2019· We present the selective laser-induced etching (SLE) process and design guidelines for the fabrication of three-dimensional (3D) microfluidic channels in a glass. The SLE process consisting of laser direct patterning and wet chemical etching uses different etch rates between the laser modified area and the unmodified area. The etch selectivity is an important …

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