Multi-criteria optimization in CO2 laser ablation of multimode polymer waveguides

Tamrin, Khairul Fikri; Zakariyah, Shefiu S.; Sheikh, Nadeem Ahmed

doi:10.1016/j.optlaseng.2015.06.010

Cited by 10 publications

(8 citation statements)

References 28 publications

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“…The ablation depth was discovered to decrease with the increase of cutting speed due to less exposure time. 8 , 9 In addition, high cutting speed results in less fiber pullout and minimum HAZ due to reduced matrix disintegration.…”

Section: Introductionmentioning

confidence: 99%

Multi-pass laser cutting of carbon/Kevlar hybrid composite: Prediction of thermal stress, heat-affected zone, and kerf width by thermo-mechanical modeling

Moghadasi

Tamrin

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Numerical modeling offers considerable promise to reduce costs associated with trial-and-error process in the manufacturing industry. In laser cutting of fiber-reinforced composites, the developed thermal stress in the cut region has considerable inﬂuence on the application of the machined composite and the end product quality. Nevertheless, measurement of the thermal stress is quite challenging in practice. Here, an uncoupled thermo-mechanical finite element model is developed to accurately predict formation of heat-affected zone, kerf width, thermal field, and thermal residual stress of an anisotropic carbon/Kevlar fiber reinforced composite during multi-pass laser cutting process. A novel approach of element deletion incorporating temperature-dependent Hashin failure criteria and VUMAT subroutine is proposed. The study is carried out using Abaqus interlinked with Fortran compiler to define laser Gaussian beam (DFLUX subroutine) and material removal (VUMAT subroutine) for determining the temperature gradient and cut characteristics, respectively. The numerical results agree well with the experimental scanning electron micrographs of heat-affected zone and kerf width. In addition, residual temperature after subsequent pass results in greater temperature distribution and heat accumulation. It has also been established that the strength of composite gradually decays with the increase of temperature due to stiffness (elastic moduli) degradation in the area of the cutting zone, accelerating damage initiation in both fibers and matrix.

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Section: Introductionmentioning

confidence: 99%

Multi-pass laser cutting of carbon/Kevlar hybrid composite: Prediction of thermal stress, heat-affected zone, and kerf width by thermo-mechanical modeling

Moghadasi

Tamrin

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…In view of this, laser micromachining offers some crucial benefit over other more-established micro-fabrication methods due to its low-cost operation and rapid fabrication [4]- [6]. Suriano et al [7] performed a thorough study of the properties of femtosecond laser-ablated polymer surfaces for microfluidic channel fabrication.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Flexible Microfluidic Strain Sensor by Laser Micromachining for Hand Motion Tracking

Tamrin¹,

Khalid²,

Rigit³

2020

IJMMM

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Various types of strain sensors have been developed for providing reliable monitoring of human health. Microfluidic strain sensors is favourable for such an application due to its outstanding performance under a variety of three-dimensional deformations on the basis of elastic channel deformation. In this study, we report for the first time laser-machined micro-channels on fabricated epoxy substrate. Fabrication of flexible microfluidic sensor using soft clear epoxy is investigated. A ratio of 100:30 of epoxy resin-to-hardener results in a flexible and elastic epoxy layer. Laser micromachining (ablation) technique at varying parameters is conducted using Taguchi Experimental Design. Low number of passes for both kerf depth and kerf width gives an optimum response, while laser power and laser cutting speed differs for kerf width and kerf depth. Microstructure imaging is carried out using scanning electron microscopy for heat-affected zone examination.

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“…In the pulsed mode, CO 2 laser machining of PMMA (polymethyl methacrylate) waveguides was reported by Steenberge et al [7]. Subsequently, an extensive study on a continuous wave (CW) CO 2 laser processing of Truemode ™ polymer is detailed by Zakariyah et al [8,9]. e study presented direct relationship between the depth of ablation and the scanning energy density while the width of the track was seen to vary logarithmically with the scanning energy density.…”

Section: Introductionmentioning

confidence: 99%

“…Some researchers have suggested using techniques of soft computing to deal with these complexities [6,[8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Experiment and Prediction of Ablation Depth in Excimer Laser Micromachining of Optical Polymer Waveguides

Tamrin

Zakariyah

Hossain

et al. 2018

Advances in Materials Science and Engineering

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Extending the data transfer rates through dense interconnections at inter-and intraboard levels is a well-established technique especially in consumer electronics at the expense of more cross talk, electromagnetic interference (EMI), and power dissipation. Optical transmission using optical fibre is practically immune to the aforementioned factors. Among the manufacturing methods, UV laser ablation using an excimer laser has been repeatedly demonstrated as a suitable technique to fabricate multimode polymer waveguides. However, the main challenge is to precisely control and predict the topology of the waveguides without the need for extensive characterisation which is both time consuming and costly. In this paper, the authors present experimental results of investigation to relate the fluence, scanning speed, number of shots, and passes at varying pulse repetition rate with the depth of ablation of an acrylate-based photopolymer. e depth of ablation essentially affects total internal reflection and insertion loss, and these must be kept at minimum for a successful optical interconnection on printed circuit boards. e results are then used to predict depth of ablation for this material by means of adaptive neurofuzzy inference system (ANFIS) modelling. e predicted results, with a correlation of 0.9993, show good agreement with the experimental values. is finding will be useful in better predictions along with resource optimisation and ultimately helps in reducing cost of polymer waveguide fabrication.

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Multi-criteria optimization in CO2 laser ablation of multimode polymer waveguides

Cited by 10 publications

References 28 publications

Multi-pass laser cutting of carbon/Kevlar hybrid composite: Prediction of thermal stress, heat-affected zone, and kerf width by thermo-mechanical modeling

Multi-pass laser cutting of carbon/Kevlar hybrid composite: Prediction of thermal stress, heat-affected zone, and kerf width by thermo-mechanical modeling

Fabrication of Flexible Microfluidic Strain Sensor by Laser Micromachining for Hand Motion Tracking

Experiment and Prediction of Ablation Depth in Excimer Laser Micromachining of Optical Polymer Waveguides

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