scholarly journals Technology of Polymer Microtips’ Manufacturing on the Ends of Multi-Mode Optical Fibers

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 416 ◽  
Author(s):  
Monika Żuchowska (Chruściel) ◽  
Paweł Marć ◽  
Iwona Jakubowska ◽  
Leszek R. Jaroszewicz
Keyword(s):  
Optical Fibers ◽  
Spectral Characteristics ◽  
Optical Power ◽  
Surface Structures ◽  
Optical Measurements ◽  
Monomer Mixture ◽  
Basic Technology ◽  
Different Shapes ◽  
Multi Mode ◽  
Micro Elements

The technology of polymer microtips’ manufacturing on the ends of selected multi-mode fibers has been reported. The study’s key element was an extended description of technology parameters’ influence on the shape of these 3D microstructures. Basic technology parameters such as spectral characteristics of the light source, monomer mixture type, optical power, and exposure time were taken under consideration. Depending on those parameters, different shapes, sizes, and surface structures of microtips were obtained. The spectral characteristics of the light and optical power delivered to a monomer drop were identified as the most important parameters for the formation of the desired 3D shape of the microtip. Presented experimental results are the base for further studies directed to the application of these micro-elements in the fields of optical measurements and sensors’ technology.

scholarly journals Energy exchange during third harmonic generation in multi-mode optical fibers

2021 ◽  
Vol 1859 (1) ◽  
pp. 012050
Author(s):  
Z Kasapeteva ◽  
A Dakova ◽  
V Slavchev ◽  
D Dakova ◽  
L Kovachev ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Harmonic Generation ◽  
Energy Exchange ◽  
Third Harmonic Generation ◽  
Third Harmonic ◽  
Multi Mode

Influence of depth of intermediate layer on optical power distribution in W-type optical fibers

2012 ◽  
Vol 51 (20) ◽  
pp. 4896 ◽  
Author(s):  
Ana Simović ◽  
Alexandar Djordjevich ◽  
Svetislav Savović
Keyword(s):  
Optical Fibers ◽  
Power Distribution ◽  
Intermediate Layer ◽  
Optical Power

scholarly journals Advanced Thermally Drawn Multimaterial Fibers: Structure-Enabled Functionalities

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Zhe Wang ◽  
Mengxiao Chen ◽  
Yu Zheng ◽  
Jing Zhang ◽  
Zhixun Wang ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Early Stage ◽  
Rapid Development ◽  
Wearable Devices ◽  
Surface Structures ◽  
The Past ◽  
High Scalability ◽  
Drawing Technique ◽  
Symmetric Structures ◽  
Thermal Drawing

Thermally drawn multimaterial fibers have experienced rapid development in the past two decades owing to the high scalability, uniformity, and material and structure compatibility of the thermal drawing technique. This article reviews various multimaterial fibers based on different functional structures and their applications in disparate fields. We start from the functional structures achieved in optical fibers developed in the early stage of thermally drawn fibers. Subsequently, we introduce both typical functional structures and unique structures created in multimaterial fibers for varying applications. Next, we present the early attempts in breaking the axial symmetric structures of thermally drawn fibers for extended functionalities. Additionally, we summarize the current progress on creating surface structures on thermally drawn fibers. Finally, we provide an outlook for this trending topic towards wearable devices and smart textiles.

scholarly journals Macrobending Loss Analysis on Singlemode-Multimode-Singlemode Fiber Optic Core

2019 ◽  
Vol 9 (2) ◽  
pp. 11-15
Author(s):  
Sisca Arisya Harry Andhina
Keyword(s):  
Light Source ◽  
Optical Fibers ◽  
Fiber Optic ◽  
Optical Power ◽  
Single Mode ◽  
Fiber Optic Cable ◽  
Power Meter ◽  
Loss Analysis ◽  
Measurement Results ◽  
Source Test

Macrobending often occurs in optical fibers that embedded in the ground due to shifting of soil or rocks in the ground causing interference in transmission. In this study used single-mode-multimode-singlemode fiber optic cable connected manually and axially measured using a light source test equipment and optical power meter and the results will be compared. The measurement results obtained the greater  value of macrobending losses with the smaller the diameter of the winding, and the greater the number of turns. The highest value of macrobending losses in multimode cables is -1.48dB at 0.5cm diameter with 5 turns, highest value of macrobending losses on single mode cables is -12.73dB at 0.5cm diameter with 5 turns,  lowest value of macrobending losses for multimode cables is -0.44dB at 5cm diameter with 1 twist, lowest macrobending losses in singlemode cables is -1.69dB at 5cm diameter with 1 twist. While the value of macrobending losses on axially connected SMS cables shows the highest value of macrobending losses on multimode cables is -1.12dB in diameter of 0.5cm with 5 turns,  highest value of macrobending losses on singlemode cables is -1.18dB at diameter of 0.5cm with 5 turns,  lowest value for macrobending losses on multimode cables is -0.66dB at 5cm in diameter with 1 twist, the smallest value for macrobending losses on singlemode cables is -0.27dB at 5cm diameter with 1 twist . The measurement results also showed that the macrobending losses of manually connected SMS cables were greater than the macrobending losses of axially connected SMS cables.

scholarly journals Global characterization of optical power propagation in step-index plastic optical fibers

2006 ◽  
Vol 14 (20) ◽  
pp. 9028 ◽  
Author(s):  
Javier Mateo ◽  
M. Angeles Losada ◽  
Ignacio Garcés ◽  
Joseba Zubia
Keyword(s):  
Optical Fibers ◽  
Optical Power ◽  
Step Index ◽  
Plastic Optical Fibers

scholarly journals The role of dye affinity in optical measurements of Cai2+ transients in cardiac muscle

2014 ◽  
Vol 307 (1) ◽  
pp. H73-H79 ◽  
Author(s):  
Wei Kong ◽  
Vladimir G. Fast
Keyword(s):  
Optical Fibers ◽  
Cardiac Tissue ◽  
Ventricular Myocardium ◽  
Left Ventricular ◽  
Optical Measurements ◽  
Neonatal Rat ◽  
High Affinity ◽  
Cycle Lengths ◽  
Rat Myocytes

Previous experiments in cultures of neonatal rat myocytes demonstrated that the shape of Cai2+ transients measured using high-affinity Ca2+-sensitive dyes may be misrepresented. The purpose of this study was to examine the role of dye affinity in Cai2+ measurements in intact adult cardiac tissue by comparing optical recordings obtained with high- and low-affinity dyes. Experiments were carried out in porcine left ventricular (LV) wedge preparations stained locally by intramural injection via microcapillaries (diameter = 150 μm) with a low-affinity Ca2+-sensitive dye Fluo-4FF or Fluo-2LA (nominal Kd, ∼7–10 μmol/l), high-affinity dye Rhod-2 ( Kd = 0.57 μmol/l), and Fluo-4 or Fluo-2MA ( Kd, ∼0.4 μmol/l); in addition, tissue was stained with transmembrane potential ( Vm)-sensitive dye RH-237. Optical recordings of Vm and Cai2+ were made using optical fibers (diameter = 325 μm) glued with the microcapillaries. The durations of Cai2+ transients measured at 50% level of recovery (CaD50) using high-affinity Fluo-4/Fluo-2MA dyes were up to ∼81% longer than those measured with low-affinity Fluo-4FF/Fluo-2LA at long pacing cycle lengths (CL). In Fluo-4/Fluo-2MA measurements at long CLs, Cai2+ transients often (∼50% of cases) exhibited slow upstroke rise and extended plateau. In Rhod-2 measurements, CaD50 was moderately longer (up to ∼35%) than in Fluo-4FF recordings, but Cai2+ transient shapes were similar. In all series of measurements, mean action potential duration values were not significantly different ( P > 0.05). The delays between Vm and Cai2+ upstrokes were comparable for low- and high-affinity dyes ( P > 0.05). In conclusion, measurements of Cai2+ transient in ventricular myocardium are strongly affected by the affinity of Ca2+ dyes. The high-affinity dyes may overestimate the duration and alter the shape of Cai2+ transients.

scholarly journals Microfluidic Method of Pig Oocyte Quality Assessment in relation to Different Follicular Size Based on Lab-on-Chip Technology

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Bartosz Kempisty ◽  
Rafał Walczak ◽  
Paweł Antosik ◽  
Patrycja Sniadek ◽  
Marta Rybska ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Spectral Characteristics ◽  
Oocyte Quality ◽  
Lab On Chip ◽  
Chip Technology ◽  
Porcine Oocyte ◽  
Follicular Size ◽  
On Chip ◽  
Pig Oocyte

Since microfollicular environment and the size of the follicle are important markers influencing oocyte quality, the aim of this study is to present the spectral characterization of oocytes isolated from follicles of various sizes using lab-on-chip (LOC) technology and to demonstrate how follicle size may affect oocyte quality. Porcine oocytes (each,n=100) recovered from follicles of different sizes, for example, from large (>5 mm), medium (3–5 mm), and small (<3 mm), were analyzed after precedingin vitromaturation (IVM). The LOC analysis was performed using a silicon-glass sandwich with two glass optical fibers positioned “face-to-face.” Oocytes collected from follicles of different size classes revealed specific and distinguishable spectral characteristics. The absorbance spectra (microspectrometric specificity) for oocytes isolated from large, medium, and small follicles differ significantly (P<0.05) and the absorbance wavelengths were between 626 and 628 nm, between 618 and 620 nm, and less than 618 nm, respectively. The present study offers a parametric and objective method of porcine oocyte assessment. However, up to now this study has been used to evidence spectral markers associated with follicular size in pigs, only. Further investigations with functional-biological assays and comparing LOC analyses with fertilization and pregnancy success and the outcome of healthy offspring must be performed.

Analysis of optical-power redistribution for hybrid optical fibers

2007 ◽  
Author(s):  
J. Skapa ◽  
V. Vašinek ◽  
P. Šiška
Keyword(s):  
Optical Fibers ◽  
Optical Power
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