A5006178119- Photonic and Optical Devices
- High-Temperature Coating Behaviors
- Advanced Fiber Optic Sensors
- Laser Material Processing Techniques
- Surface Modification and Superhydrophobicity
- Fluid Dynamics and Heat Transfer
- Advanced Sensor and Energy Harvesting Materials
- Nanomaterials and Printing Technologies
- Cell Image Analysis Techniques
- Analytical Chemistry and Sensors
- Water Quality Monitoring and Analysis
- Spectroscopy and Laser Applications
- Digital Imaging for Blood Diseases
- Advanced Chemical Sensor Technologies
- Laser-Ablation Synthesis of Nanoparticles
- Particle Dynamics in Fluid Flows
- Electrowetting and Microfluidic Technologies
- Advanced Fiber Laser Technologies
- Nonlinear Optical Materials Studies
Purdue University West Lafayette
1998-2023
We report, for the first time, use of a fiber optic Mach-Zehnder interferometer to measure core refractive index changes written by an ultrafast laser irradiation. The core-offset was constructed splicing slightly misaligned stub standard single-mode between lead-in and lead-out optical fibers. When in-fiber is altered, it phase light. Since light propagating in cladding (reference arm) remains unchanged, transmission fringe pattern observes spectral shift. shift used quantify effective...
Abstract In recent years, the metallization of polymers has been intensely studied as it takes advantage both plastics and metals. Laser direct writing (LDW) is one most widely used technologies to obtain metal patterns on polymer substrates. LDW technology, different methods including injection-molding, drop-casting, dip coating, spin coating are utilized for surface preparation materials prior laser activation process. this study, an atomization based dual regime spray system introduced a...
In this research, we monitored the solidification process of PVA solution using a fiber optic refractive index sensor. During monitoring in paper, two Fabry-Pérot cavities were used to monitor temperature and sample. The advantage method is that related change obvious, status materials can be directly observed during testing process. Furthermore, more cost-effective compared with its heat flow-based counterpart. Differential scanning calorimetry (DSC) tests performed same material heating...
Abstract In this research, we proposed fabrication process of optical fiber sensors using femtosecond laser and their applications. A beam was focused by an objective lens in the fiber. By testing different conditions, a group machining parameters found that achieve minimum resolution 3.2 μm. To ablate core fiber, which is buried deep inside cladding, precisely, part cladding removed to expose as close possible air. making complex pattern modify path sensitivity 942.8–1015.6 nm per...
Abstract Cold spray additive manufacturing (CSAM) is an emerging technique for scalable and rapid deposition of thick metallic coatings on various substrates. Despite great promises, CSAM with no upper limit coating thickness remains challenging due to the stochastic nature cold (CS) deposition. In particular, using axisymmetric nozzles (i.e., circular supersonic nozzles) lead a quasi-Gaussian shaped particle distribution target surface, which limits formation triangular-shaped...
Abstract Although significant advances have been made in the development of biocompatible materials, currently available biomaterials still present a number problems for vivo applications. One attempts to improve biocompatibility, especially blood-compatibility, has surface modification. Typically, poly(ethylene glycol) (PEG), albumin, heparin, and phospholipid molecules are grafted prevent protein adsorption cell adhesion. We modifying biomaterial surfaces by covalent grafting PEG albumin....
Abstract In this research, we proposed fabrication process of optical fiber sensors using femtosecond laser and their applications. A beam was focused by an objective lens on the fiber. By testing different conditions, a group machining parameters found that achieve minimum resolution 3.2 μm. To ablate core fiber, which is buried deep inside cladding, precisely, part cladding removed to expose as close possible air. making complex pattern modify path sensitivity 942.8 1015.6 nm/RIU obtained...