Workpiece Alignment for Hybrid Laser Aided Part Repair Process

Work piece alignment is a key issue for hybrid laser aided part repair, a process utilizing both machining and laser deposition. Proper alignment can greatly improve the accuracy of the repair process. This paper introduces a method for aligning a physical work piece and a CAD model using a Renishaw touch probe and software tools. Also discussed is a model for computing 5-axis CNC positions based on a desired work piece orientation.Mechanical Engineerin

Two-Color Terawatt Laser System For High-Intensity Laser-Plasma Experiments

We report a two-color terawatt laser system for use in controlling laser-plasma instabilities. The system includes a commercial 45 TW Ti:Sapphire laser system at 800 nm, temporally synchronized with a 1 TW CPA Raman-Ti:Sapphire hybrid laser centered at 873nm that we designed and built to complement the 800 nm system. The two-color system will be used to seed, enhance, suppress, or otherwise control a variety of instabilities which arise in laser-plasma interactions.Physic

ANALISIS KARAKTERISTIK MATERIAL KOMPONEN PADA RANCANG BANGUN MESIN ROBOT DRAWING HYBRID LASER

Mesin Robot Drawing Hybrid Laser merupakan Mesin yang dikontrol oleh komputer dengan menggunakan bahasa numerik (data perintah dengan kode angka, huruf dan simbol) sesuai standar ISO. Mesin Robot Drawing Hybrid Laser ini menggunakan software-software antara lain Arduino, Processing, Camotic, Laser GRBL dan Inkscape. Mesin Robot Drawing Hybrid Laser sangat membantu dalam membuat penggambaran pola dan pengenalan pola. Adapun beberapa hardware-nya yaitu Arduino Uno, CNC Shield v3, DRV8825, Motor Stepper Nema 17, dan komponen mekaniknya. Dan untuk permodelannya 2 in 1 bisa digunakan keduanya dengan satu Mesin. Mesin Robot Drawing Hybrid Laser ini termasuk mesin CNC, karena dalam pengoperasiannya menggunakan kode-kode NC. Kode tersebut didapat dari gambar yang telah diterjemahkan menggunakan aplikasi Laser GRBL. Penelitian ini bertujuan untuk mengetahui bahan material yang digunakan untuk komponen Mesin Robot Drawing Hybrid Laser, ketika mesin beroperasi pasti ada bagian komponen yang mengalami kerusakan dan penulis memberi solusi dengan membuat komponen yang rusak tersebut dengan bahan lain. Material yang digunakan untuk poros rail berupa stainless steel, puli menggunakan bahan alumunium, serta main frame, box transmission, bracket dan plotter menggunakan bahan plastik filamen PLA (Polylactid Acid). Bahan-bahan yang digunakan untuk komponen mekanik disesuaikan dengan kebutuhan rancang bangun, komponen yang terjadi kerusakan adalah plotter dengan bahan plastik PLA karena saat terjadi gaya sebesar 20 Newton komponen tersebut akan patah. Dan bahan plotter berupa plastik PLA dan PETG tidak mempengaruhi hasil gambar atau pola yang dikerjakan

A hybrid single-mode laser based on slotted silicon waveguides

An InGaAsP-Si hybrid single-mode laser based on etched slots in silicon waveguides was demonstrated operating at 1543 nm. The InGaAsP gain structure was bonded onto a patterned silicon-on-insulator wafer by selective area metal bonding method. The mode-selection mechanism based on a slotted silicon waveguide was applied, in which the parameters were designed using the simulation tool cavity modeling framework. The III-V lasers employed buried ridge stripe structure. The whole fabrication process only needs standard photolithography and inductively coupled plasma etching technology, which reduces cost for ease in technology transfer. At room temperature, a single mode of 1543-nm wavelength at a threshold current of 21 mA with a maximum output power of 1.9 mW in continuous-wave regime was obtained. The side mode suppression ratio was larger than 35 dB. The simplicity and flexibility of the fabrication process and a low cost make the slotted hybrid laser a promising light source

Supermode Si/III-V hybrid lasers, optical amplifiers and modulators: A proposal and analysis

We describe a hybrid laser structure which consists of an amplifying III-V waveguide proximity-coupled to a passive Si waveguide. By operating near the synchronism point (where the phase velocities of the individual waveguides are equal), we can cause the optical power to be confined to any of the two waveguides. This is accomplished by control of waveguides’ geometry. In the portion of the supermode resonator where amplification takes place, the mode is confined nearly completely to III-V guide thus realizing a near maximal gain. Near the output facet, the mode power is confined to the Si waveguide thus optimizing the output coupling. This is to be contrasted with approaches which depend on evanescent field penetration into the III-V medium to obtain gain

Low-threshold heterogeneously integrated InP/SOI lasers with a double adiabatic taper coupler

We report on a heterogeneously integrated InP/silicon-on-insulator (SOI) laser source realized through divinylsiloxane-bis-benzocyclobutene (DVS-BCB) wafer bonding. The hybrid lasers present several new features. The III-V waveguide has a width of only 1.7 mu m, reducing the power consumption of the device. The silicon waveguide thickness is 400 nm, compatible with high-performance modulator designs and allowing efficient coupling to a standard 220-nm high index contrast silicon waveguide layer. In order to make the mode coupling efficient, both the III-V waveguide and silicon waveguide are tapered, with a tip width for the III-V waveguide of around 800 nm. These new features lead to good laser performance: a lasing threshold as low as 30 mA and an output power of more than 4 mW at room temperature in continuous-wave operation regime. Continuous wave lasing up to 70 degrees C is obtained

Investigation into feasibility of hybrid laser-GMAW process for welding high strength quenched and tempered steel

In this study, the feasibility of hybrid laser-gas metal arc welding process for replacement of conventional flux-cored arc welding procedure for welding high strength quenched and tempered steel was investigated. Experimental work focused on optimisation of process parameters to produce joint with desired properties. Hardness of the weld heat affected zone produced by both processes has been measured. Productivity and cost effectiveness of both processes were compared. It was concluded that hybrid laser-gas metal arc welding process is suitable for welding high strength quenched and tempered steel