Comparison of different optical models of graphene for the analysis of graphene-attached microfibers and D-shaped fibers

2019 ◽  
Vol 452 ◽  
pp. 347-354
Author(s):  
Ting Hao ◽  
Zeshan Chang ◽  
Kin Seng Chiang
Keyword(s):  
Shaped Fibers

Investigation of flow dynamics of thin viscous films down differently shaped fibers

2021 ◽  
Vol 119 (20) ◽  
pp. 201601
Author(s):  
Qirui Xie ◽  
Rong Liu ◽  
Xun Wang ◽  
Xue Chen
Keyword(s):  
Flow Dynamics ◽  
Shaped Fibers

scholarly journals On the cross-section of shaped fibers in the dry spinning process: Physical explanation by the geometric potential theory

2019 ◽  
Vol 14 ◽  
pp. 102347 ◽  
Author(s):  
Zhanping Yang ◽  
Feng Dou ◽  
Tao Yu ◽  
Minfeng Song ◽  
Haoxuan Shi ◽  
...  
Keyword(s):  
Potential Theory ◽  
Cross Section ◽  
Physical Explanation ◽  
Dry Spinning ◽  
Spinning Process ◽  
The Cross ◽  
Shaped Fibers

Evaluation of Fundamental UHPC Properties According to the Shape of Steel Fiber

2010 ◽  
Vol 452-453 ◽  
pp. 717-720 ◽  
Author(s):  
Gum Sung Ryu ◽  
Su Tae Kang ◽  
Jung Jun Park ◽  
Kyung Taek Koh ◽  
Sung Wook Kim
Keyword(s):  
Aspect Ratio ◽  
Flexural Strength ◽  
High Performance ◽  
High Performance Concrete ◽  
Steel Fibers ◽  
Flexural Behavior ◽  
Ultra High Performance Concrete ◽  
Aspect Ratios ◽  
Strength Tests ◽  
Shaped Fibers

This paper intends to examine the effects if the length and shape of steel fibers on the mechanical characteristics of ultra-high performance concrete (UHPC). Accordingly, the length (l) of the steel fibers with diameter (d) of 0.2 mm is varied as 13 mm, 16.3 mm and 19.5 mm and their corresponding aspect ratios (l/d) are 65, 82 and 98. Straight and wave-shaped fibers are adopted to manufacture UHPC. Thereafter, the effects of the aspect ratio and characteristics of the wave-shape of the steel fibers on the strength characteristics of UHPC are examined through compressive and flexural strength tests. The results showed small differences in the workability and compressive behavior but revealed that changing the length of the fibers and increasing the aspect ratio are improving the flexural behavior of UHPC. Specifically, the flexural strength was enhanced by 25% and the flexural toughness by 30%. Compared to rectilinear fibers, the adoption of wave-shaped fibers is seen to degrade the flexural behavior regardless of the aspect ratio. Consequently, using straight steel fibers and adopting larger aspect ratio seems advisable to improve the toughness of UHPC.

scholarly journals 2 μm passively mode-locked thulium-doped fiber lasers with Ta2AlC-deposited tapered and side-polished fibers

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Ahmad ◽  
M. F. M. Azri ◽  
R. Ramli ◽  
M. Z. Samion ◽  
N. Yusoff ◽  
...  
Keyword(s):  
Fiber Lasers ◽  
Laser System ◽  
Wavelength Region ◽  
Wave Interaction ◽  
Aluminum Carbide ◽  
Max Phase ◽  
Stable Mode ◽  
Tapered Fiber ◽  
Side Polished Fiber ◽  
Shaped Fibers

AbstractIn this work, mode-locked thulium-doped fiber lasers operating in the 2 µm wavelength region were demonstrated using tantalum aluminum carbide (Ta2AlC)-based saturable absorbers (SAs) utilizing the evanescent wave interaction. The Ta2AlC MAX Phase was prepared by dissolving the Ta2AlC powder in isopropyl alcohol and then deposited onto three different evanescent field-based devices, which were the tapered fiber, side-polished fiber, and arc-shaped fiber. Flame-brushing and wheel-polishing techniques were used to fabricate the tapered and arc-shaped fibers, respectively, while the side-polished fiber was purchased commercially. All three SA devices generated stable mode-locked pulses at center wavelengths of 1937, 1931, and 1929 nm for the tapered, side-polished, and arc-shaped fibers. The frequency of the mode-locked pulses was 10.73 MHz for the tapered fiber, 9.58 MHz for the side-polished fiber, and 10.16 MHz for the arc-shaped fiber. The measured pulse widths were 1.678, 1.734, and 1.817 ps for each of the three SA devices. The long-term stability of the mode-locked lasers was tested for each configuration over a 2-h duration. The lasers also showed little to no fluctuations in the center wavelengths and the peak optical intensities, demonstrating a reliable, ultrafast laser system.

scholarly journals Mesoporous carbon nanospheres deposited onto D-shaped fibers for femtosecond pulse generation

RSC Advances ◽  
2019 ◽  
Vol 9 (21) ◽  
pp. 11621-11626 ◽  
Author(s):  
Fang Wang ◽  
Hua Zhou ◽  
Nan Li ◽  
Jiaxing Liu ◽  
Daguang Li ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Femtosecond Pulse ◽  
Nonlinear Optical ◽  
Pulse Generation ◽  
Optical Modulation ◽  
Carbon Nanospheres ◽  
Shaped Fibers

We demonstrate nonlinear optical modulation by combining mesoporous carbon nanospheres (MCNs) and D-shaped fibers (DFs).

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