Investigation on epoxy flow processing parameters and v-groove fabrication parameters for the passive alignment of optical fibers

2008 ◽  
Author(s):  
Jimmy Ka San Lam
Keyword(s):  
Optical Fibers ◽  
Processing Parameters ◽  
Passive Alignment ◽  
Fabrication Parameters

scholarly journals Optimization of Fiber Bragg Gratings Inscribed in Thin Films Deposited on D-Shaped Optical Fibers

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4056
Author(s):  
José Javier Imas ◽  
Carlos R. Zamarreño ◽  
Ignacio del Villar ◽  
Ignacio R. Matías
Keyword(s):  
Thin Film ◽  
Film Thickness ◽  
Optical Fibers ◽  
Flat Surface ◽  
Sno2 Thin Film ◽  
Thin Film Thickness ◽  
A Value ◽  
Surrounding Refractive Index ◽  
Reflected Power ◽  
Fabrication Parameters

A fiber Bragg grating patterned on a SnO2 thin film deposited on the flat surface of a D-shaped polished optical fiber is studied in this work. The fabrication parameters of this structure were optimized to achieve a trade-off among reflected power, full width half maximum (FWHM), sensitivity to the surrounding refractive index (SRI), and figure of merit (FOM). In the first place, the influence of the thin film thickness, the cladding thickness between the core and the flat surface of the D-shaped fiber (neck), and the length of the D-shaped zone over the reflected power and the FWHM were assessed. Reflected peak powers in the range from −2 dB to −10 dB can be easily achieved with FWHM below 100 pm. In the second place, the sensitivity to the SRI, the FWHM, and the FOM were analyzed for variations of the SRI in the 1.33–1.4 range, the neck, and the thin-film thickness. The best sensitivities theoretically achieved for this device are next to 40 nm/RIU, while the best FOM has a value of 114 RIU−1.

Passive Alignment of Optical Fiber in a V-Groove With Low Viscosity Epoxy Flow

2003 ◽  
Author(s):  
Jeffery C. C. Lo ◽  
C. S. Yung ◽  
S. W. Ricky Lee ◽  
Steve H. K. Lee ◽  
J. S. Wu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Processing Time ◽  
Cover Plate ◽  
Manufacturing Cost ◽  
Optoelectronic Packaging ◽  
Low Viscosity ◽  
Epoxy Dispensing ◽  
A New Technique ◽  
Passive Alignment

The alignment of optical fibers is very critical in optoelectronic packaging. A slight offset in any direction may severely affect the performance of the photonic device. Recently, passive alignment of optical fibers has attracted substantial attention due to its lower manufacturing cost and faster processing time when compared with active alignment. For conventional passive alignment, the position of each optical fiber is defined by the geometry of a V-groove. The epoxy is dispensed from the top of the V-groove and another cover plate is usually required to press the fiber against the walls of the V-groove. In the present study, a new technique for epoxy dispensing is developed. Instead of being applied from the top of the V-groove, some low viscosity epoxy is dispensed in a “canal” first. The epoxy fills an adjacent “reservoir” and then flows into the V-groove. Subsequently the epoxy flow runs through the gap between the optical fiber and the V-groove walls. It is observed that the flow of epoxy can align the optical fiber by the surface tension. Once the optical fiber is aligned and the epoxy is cured, more epoxy is applied in a glob-top manner to mechanical enhancement. In this paper, the configuration of the V-groove and associated features, the epoxy dispensing process, and the results of alignment are presented in details.

Real-Time Investigation of Thermal Poling Process in Optic Fiber

2013 ◽  
Vol 321-324 ◽  
pp. 453-459
Author(s):  
Jian He ◽  
Zhe Chen ◽  
Yun Han Luo
Keyword(s):  
Real Time ◽  
Optical Fibers ◽  
Processing Parameters ◽  
Test System ◽  
Fused Silica ◽  
Thermal Poling ◽  
Poling Process ◽  
High Voltage Breakdown ◽  
Time Test ◽  
Poling Voltage

Thermal poling could make centrosymmetric fused silica optical fibers generate second-order nonlinearity effect and linear electooptic effect. In order to investigate the influence of thermal poling parameters on linear electooptic effect, a real-time test system, which mainly consists of an all polarization maintaining fiber Mach-Zehnder interferometer, has been utilized to monitor the whole thermal poling process in fibers. The processing parameters in thermal poling, such as applied poling voltage, poling duration and temperature, have been measured in real time. Based on those measurements, their influence on the linear electrooptic effect has been discussed. Experiment results show that the linear electrooptic coefficient would increase when a stronger electric field is applied on fibers. Considering the anti-high-voltage breakdown capability of fibers, a DC voltage from 3KV to 4KV is suitable for polarization in thermal poling. When using 3KV, the optimum poling duration is about 16 minutes and the best temperature for thermal poling is around 190°C. Keywords: electro-optic effect, poled fiber, thermal poling, real time test system, fiber optic interferometer

Parameter optimization of aluminum alloy thin structures obtained by Selective Laser Melting

MRS Advances ◽  
2019 ◽  
Vol 4 (55-56) ◽  
pp. 2997-3005
Author(s):  
Malena Ley Bun Leal ◽  
Barbara Bermudez-Reyes ◽  
Patricia del Carmen Zambrano Robledo ◽  
Omar Lopez-Botello
Keyword(s):  
Selective Laser Melting ◽  
Process Parameters ◽  
Orthogonal Design ◽  
Processing Parameters ◽  
Future Research ◽  
Laser Melting ◽  
Complex Process ◽  
The Relationship ◽  
Fabrication Parameters

ABSTRACTSelective Laser Melting (SLM) involves numerous fabrication parameters, the interaction between those parameters determine the final characteristics of the resulting part and because of the latter, it is considered a complex process. Low-density components is one of the main issues of the SLM process, due to the incorrect selection of process parameters. These defects are undesired in high specialized applications (i.e. aerospace, aeronautic and medical industries). Therefore, the characterization of the defects (pores) found in aluminum parts manufacture by SLM and the relationship with fabrication parameters was performed. A robust orthogonal design of experiments was implemented to determine process parameters, and then parts were manufactured in SLM. Relative density of the samples was then characterized using the Archimedes principle and microscopy; the data was then statistically analyzed in order to determine the optimal process parameters. The main purpose of the present research was to establish the best processing parameters of an in-house SLM system, as well as to characterize the pore geometry in order to fully eliminate pores in a future research.

scholarly journals Analysis of Design and Fabrication Parameters for Lensed Optical Fibers as Pertinent Probes for Sensing and Imaging

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4150 ◽  
Author(s):  
Soongho Park ◽  
Sunghwan Rim ◽  
Ju Kim ◽  
Jinho Park ◽  
Ik-Bu Sohn ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Single Mode ◽  
Spot Size ◽  
Single Mode Fiber ◽  
Fiber Probe ◽  
Optical Fiber Probe ◽  
Working Distance ◽  
Physical Sensing ◽  
Fabrication Parameters

A method for adjusting the working distance and spot size of a fiber probe while suppressing or enhancing the back-coupling to the lead-in fiber is presented. As the optical fiber probe, a lensed optical fiber (LOF) was made by splicing a short piece of coreless silica fiber (CSF) on a single-mode fiber and forming a lens at the end of the CSF. By controlling the length of the CSF and the radius of lens curvature, the optical properties of the LOF were adjusted. The evolution of the beam in the LOF was analyzed by using the Gaussian ABCD matrix method. To confirm the idea experimentally, 17 LOF samples were fabricated and analyzed theoretically and also experimentally. The results show that it is feasible in designing the LOF to be more suitable for specific or dedicated applications. Applications in physical sensing and biomedical imaging fields are expected.

Influence of SLS processing parameters according to the new mathematical model on flexural properties

2016 ◽  
Vol 22 (2) ◽  
pp. 258-268 ◽  
Author(s):  
Ana Pilipović ◽  
Bogdan Valentan ◽  
Mladen Šercer
Keyword(s):  
Mathematical Model ◽  
Selective Laser Sintering ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Flexural Properties ◽  
Content Type ◽  
Manufacturing Procedure ◽  
Fabrication Parameters ◽  
Selection Of

Purpose The purpose of this paper is the selection of production parameters in selective laser sintering – SLS for the production of quality products (e.g. good mechanical properties). The manufacturing procedure affects the properties, which is especially significant in additive procedures, as the products are not cheap and the procedure and material need to be optimally selected. Design/methodology/approach The paper presents an analysis of the fabrication parameters in selective laser sintering (SLS) that affect the flexural properties of the finished product. Findings The influence of a new parameter has been found, the overlay ratio, and using the mathematical and scheme method, the selection of parameters for obtaining the optimal flexural properties has been proposed. Originality/value The paper presents a new mathematical model for the calculation of the processing parameters in SLS of polymer products and gives a diagram for the determination of which parameters are the best to use for practical purposes.

Theoretical model for the hot-melt-drawn fabrication of optical fibre probes and analysis of fabrication parameters

2011 ◽  
Vol 225 (6) ◽  
pp. 1431-1441
Author(s):  
Z-C Lin ◽  
C-B Yang ◽  
K-P Lee
Keyword(s):  
Theoretical Model ◽  
Optical Fibre ◽  
Processing Parameters ◽  
Production Quality ◽  
Drawing Rate ◽  
Probe Diameter ◽  
Fibre Probe ◽  
Fabrication Parameters ◽  
Hot Melt ◽  
Optical Fibre Probe

Optical fibre probes made by manually operated hot-melt-drawn methods may have unreliable production quality. This can result in unreliable results during use of the probes. This article presents a theoretical model for the construction of optical fibre probes by a hot-melt-drawn method, intending to simulate the optical fibre melt-drawing process using the P-2000 Sutter melt-drawing installation, and investigates changes in length, radius, and geometric profile of the optical fibre. Using preset processing parameters, the study simulates the profile, size, and shape of an optical fibre probe, and the geometric shape and diameter of the probe tip. Additionally, the article presents an analysis of fabrication parameters to determine which of the three processing parameters, probe diameter, melt-drawing rate, and hard-drawn value, is most significant in determining the length and profile of a simulation model probe.

Influence of graphene–carbon nanotubes and processing parameters on electrical and dielectric properties of polypropylene nanocomposites

2021 ◽  
pp. 002199832110067
Author(s):  
UO Uyor ◽  
API Popoola ◽  
OM Popoola ◽  
VS Aigbodion
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Dielectric Permittivity ◽  
Graphene Nanosheets ◽  
Processing Parameters ◽  
Melt Processing ◽  
Future Research ◽  
Relative Dielectric Permittivity ◽  
Melt Compounding ◽  
Fabrication Parameters

In this study, the effect of carbon nanotubes (CNTs) and graphene nanosheets (GNs) on the microstructure, electrical conductivity and relative dielectric permittivity of polypropylene (PP) nanocomposites were investigated in relation to the melt compounding parameters. Although CNTs/GNs can significantly improve the conductivity and permittivity of PP nanocomposites, more significant results can be obtained by using optimal fabrication parameters. For optimal melt processing parameters using Taguchi optimization method, electrical conductivity and relative dielectric permittivity of about 3.08 × 10−5 S/m and 158.97 were achieved, whereas only about 1.34 × 10−11 S/m and 2.02 were measured for pure PP respectively. Therefore, this study showcased optimal melt compounding process parameters for the endless future research on PP-CNTs/GNs nanocomposites for various advanced engineering applications. This will also guide future research on the uniform use of melt fabrication parameters for proximity in comparison of results published on PP-CNTs/GNs nanocomposites.

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