Article
Materials Science, Multidisciplinary
Remo N. Widmer, David Bischof, Jakub Jurczyk, Markus Michler, Jakob Schwiedrzik, Johann Michler
Summary: Recent progress in manufacturing now allows for efficient fabrication of complex oxide-glass components at the micrometer- to sub-micrometer scale, benefiting both industry and fundamental research due to numerous applications of miniature glass parts. Research shows that fused silica micro-pillars fabricated by laser-assisted etching are almost ten times stronger than their bulk-sized counterparts.
MATERIALS & DESIGN
(2021)
Article
Optics
Youwang Hu, Yalong Wang, Xianshan Dong, Xiang Xi, Chao Long, Haoning Zheng, Yao Wang, Xiaoyan Sun, Ji'an Duan
Summary: With the development of technology, fused silica has been widely used in various industrial fields. This paper proposes a method that combines femtosecond laser modification processing and chemical etching technology to cut fused silica. The processing parameters of femtosecond laser modification are explored, and high-quality cutting of millimeter-thick fused silica is achieved.
Article
Chemistry, Physical
Agne Butkute, Greta Merkininkaite, Tomas Jurksas, Jokubas Stancikas, Tomas Baravykas, Rokas Vargalis, Titas Tickunas, Julien Bachmann, Simas Sakirzanovas, Valdas Sirutkaitis, Linas Jonusauskas
Summary: Selective laser etching (SLE) is improved by utilizing an etchant solution with specific constituents, which enhances selectivity and etch rate. Varying the concentrations of these constituents changes the wetting properties and chemical reaction of fused silica etching, allowing for high etch rates and selectivity. Complex microfluidic channels and 3D glass micro-structures are successfully fabricated using this method.
Article
Optics
Joelle Harb, Lauris Talbot, Yannick Petit, Martin Bernier, Lionel Canioni
Summary: In this work, the first demonstration of Type A volume Bragg gratings (VBGs) inscribed in silver-containing phosphate glasses by femtosecond laser writing is reported. The gratings are inscribed plane-by-plane using a 1030 nm Gaussian-Bessel inscription beam, resulting in a refractive-index modification zone induced by silver clusters. The highly effective femtosecond-written VBGs with strong refractive-index modulation have potential applications in various industrial sectors.
Article
Optics
Jianping Yu, Jian Xu, Qiaonan Dong, Jia Qi, Jianfang Chen, Aodong Zhang, Yunpeng Song, Wei Chen, Ya Cheng
Summary: This paper presents a method for fabricating low-loss optofluidic waveguides in fused silica glass by using femtosecond laser microfabrication and carbon dioxide laser irradiation. Circular microchannels and open extra-access ports are first created using spatially-shaped femtosecond laser-assisted chemical etching. Then, carbon dioxide laser direct writing is applied to achieve a thermal reflow effect, which polishes all internal surfaces of the channels and seals the extra-access ports. By filling a mixture solution of decane and liquid paraffin into a laser-polished microchannel, a single-mode microfluidic optical waveguide with a propagation loss of -0.78 dB/cm at 1310 nm is obtained.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Chemical
Yu Wang, Bo Xia, Shuai Han, Chunyang Li, Lulu Wan
Summary: Despite the high brittleness of ultra-white glass, surface modification through techniques like vacuum coating and femtosecond laser-assisted chemical etching can induce modified zones on its surface, making the material more suitable for microstructure processing. The experimental optimization of laser and chemical parameters further enhances the efficiency of controlling surface modifications.
Article
Optics
Zhengming Liu, Jian Xu, Zijie Lin, Jia Qi, Xiaolong Li, Aodong Zhang, Jintian Lin, Jianfang Chen, Zhiwei Fang, Yunpeng Song, Wei Chu, Ya Cheng
Summary: Single-mode circular optofluidic waveguides were fabricated on fused silica glass substrates using femtosecond laser-assisted chemical etching based on slit beam shaping. The fabrication process involved four steps, resulting in uniform circular microchannels with diameters around 10μm and lengths at the centimeter scale. Vacuum-assisted filling of liquid paraffin and decane mixture into the microchannel structure enabled the creation of a single-mode circular optofluidic waveguide embedded in glass.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Weijie Zhou, Rao Li, Min Li, Pan Tao, Xunsi Wang, Shixun Dai, Baoan Song, Wei Zhang, Changgui Lin, Xiang Shen, Tiefeng Xu, Peiqing Zhang
Summary: This paper presents the fabrication of microlens arrays with good optical quality using wet-etching assisted femtosecond laser direct writing technology. The microlenses exhibit a wide range of diameters and achieve uniform dense stacking in the mid-infrared wavelength range. The fabricated microlens arrays have significant applications in cutting-edge mid-infrared fields.
CERAMICS INTERNATIONAL
(2022)
Article
Optics
Joao M. Maia, Duarte Viveiros, Vitor A. Amorim, P. V. S. Marques
Summary: This work focuses on the fabrication of straight silica-core liquid-cladding suspended waveguides using fs-laser micromachining in a microfluidic channel. The waveguides are further smoothed and reshaped into a circular cross-section through post-processing thermal treatment. The study shows that the suspended waveguides have adjustable insertion losses and allow for the reconfiguration of the mode profile, enhancing the evanescent interaction between light and analyte.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Chemistry, Physical
Agne Butkute, Tomas Jurksas, Tomas Baravykas, Bettina Leber, Greta Merkininkaite, Rugile Zilenaite, Deividas Cereska, Aiste Gulla, Mindaugas Kvietkauskas, Kristina Marcinkeviciute, Peter Schemmer, Kestutis Strupas
Summary: Nowadays, lab-on-chip (LOC) devices are gaining more attention due to their vast prospects in various biomedical applications. These small devices serve a single laboratory function and have great potential for organ-on-chip (OOC) device manufacturing. However, this technology is still in development.
Article
Chemistry, Physical
Bao-Xu Wang, Jin-Yong Qi, Yi-Ming Lu, Jia-Xin Zheng, Ying Xu, Xue-Qing Liu
Summary: A hybrid method combining fs-laser scanning, subsequent etching, and annealing was proposed in this work to fabricate micro-optical devices on glass with low roughness. The method not only improved the fabrication efficiency significantly but also decreased the surface roughness, enabling the realization of micro-optical components with excellent properties.
Article
Multidisciplinary Sciences
Timothy Lee, Qi Sun, Martynas Beresna, Gilberto Brambilla
Summary: This study introduces the fabrication and use of microcracks embedded in glass as an optical element for manipulating light propagation to enhance waveguide performance in silica integrated optics. Utilizing a femtosecond laser to induce an asymmetric stress pattern in silica, uniform cracks with set dimensions can be created within the substrate to improve waveguide modal confinement. The technique also addresses high bendloss issues in femtosecond laser written silica waveguides by cleaving the outer edge of laser written waveguide bends, achieving losses down to 1 dB/cm at 10 mm bend radius without introducing additional scattering.
SCIENTIFIC REPORTS
(2021)
Article
Nanoscience & Nanotechnology
Zhong-Yun Chen, Hong-Zhong Cao, Liang-Cheng Cao, Gan Fang, Xuan-Ming Duan
Summary: In this study, silver micro/nanostructures were printed by capturing silver nanoparticles in water with an 800 nm femtosecond laser trapping. The relationships between laser power, scanning speed, nanoparticle concentration, and the morphology of fabricated silver wire were systematically investigated. Low scanning speed and high nanoparticle concentration were found to be favorable for printing silver wire with good morphology, resulting in a wire width of 305 nm. The printed structures have potential applications in metamaterials, flexible electronics, and SERS.
Article
Chemistry, Analytical
Hua Tan, Jiahui Pan, Xiaojia Zheng, Xiaoquan Fu, Yuxun Zhang, Yanxing Liu, Qiheng Huang
Summary: This study utilizes femtosecond laser glass welding technology to form four different porous structures of welding spots through specific manufacturing processes. The welding spot fabricated by the flattened Gaussian beam exhibits smooth edges and a flat pore bottom. The welding spot manufactured with alternating high repetition rates introduces multiple refractive indices.
Article
Chemistry, Physical
Sergey Fedotov, Alexey Lipatiev, Tatiana Lipateva, Sergey Lotarev, Vladimir Sigaev
Summary: This study demonstrates that the introduction of Al2O3 in binary sodium borate glass can increase its chemical stability and preserve the possibility of optical memory applications. It also reveals a new method of selective etching of laser-written tracks using distilled water.
