Results 241 to 250 of about 14,738,138 (292)

Flexible and efficient triboelectric nanogenerators based on PVDF and boron nitride composite yarns and mats.

Nanoscale
Sukumaran S, Moradi A, Szewczyk PK, Stachewicz U.   +3 more
europepmc   +1 more source

Multiring large-mode-area delivery fiber for high power

Applied Optics, 2013
The study presents a novel design of multiring delivery fiber with large mode area for high power. Using a FiberCAD method, we investigated a fiber whose core is surrounded by alternative low- and high-index rings. Based on our calculation, the effective area is 400 μm2 at 1.08 μm, larger than the ~280 μm2 of conventional step-index fiber (20/400). The
Li, Lu, Zhang, Aidong, Zhan, Huan, He, Jianli, Shi, Tengfei, Zhou, Zhiguang, Xiao, Xusheng, Lin, Aoxiang   +7 more
openaire   +4 more sources

Some of the next articles are maybe not open access.

Related searches:

Very-large-mode-area, single-mode multicore fiber

Optics Letters, 2009
A single-mode evanescently coupled multicore fiber consisting of 19 hexagonally arranged cores is investigated. Theoretical and experimental results are presented and compared to an equivalent hypothetical step-index fiber. A fundamental mode with an effective area of 465 microm(2) and a beam propagation factor M(2) of 1.02 was measured, showing the ...
Moritz M, Vogel, Marwan, Abdou-Ahmed, Andreas, Voss, Thomas, Graf   +3 more
openaire   +2 more sources

Ultra-Large Mode-Area Fibers

2007 Conference on Lasers and Electro-Optics (CLEO), 2007
We review the performance and applications of a recently demonstrated platform that utilises higher-order modes in few-moded fibers to facilitate robust, bend-resistant, long-length light-propagation in ultra-large modal areas.
Siddharth Ramachandran, Samir Ghalmi, Man Yan   +2 more
openaire   +1 more source

The design of large-mode-area single-mode fiber

SPIE Proceedings, 2008
Based on the frustrated total internal reflection theory, a leaky large-mode-area double clad fiber is designed. The propagation constants and leakage loss of the fundamental mode LP 01 and sub-low order mode LP 11 is investigated by using of the matrix method. Results show that the designed fiber can operate with single-mode.
Guohua Wu, Libo Li, Qihong Lou, Jun Zhou, Wenhan Huang, Shouqi Zhang, Wei Wang   +6 more
openaire   +1 more source

Parasitic Modes in Large Mode Area Microstructured Fibers

OFC/NFOEC 2007 - 2007 Conference on Optical Fiber Communication and the National Fiber Optic Engineers Conference, 2007
We present experimental evidence for parasitic modes guided by both bandgap and low density of state effects in large mode area silica microstructured fibers and explore ways of minimizing their presence via the fiber geometry.
Joanne C. Flanagan, R. Amezcua-Correa, F. Poletti, J.R. Hayes, N.G.R. Broderick, D.J. Richardson   +5 more
openaire   +1 more source

Design of large mode area, mode selection fiber

SPIE Proceedings, 2014
The paper study on the effect of index distribution on the mode field and calculated the mode distribution in various index profiles. A single mode gaussian hybrid multicore fiber with 19 hexagonally arranged high index quartz rods is designed and investigated. Theoretical and simulative results are presented and compared to the conventional large mode
Liang Jin, Li Xu, He Zhang, Yonggang Zou, Ye Ding, Xiaohui Ma   +5 more
openaire   +1 more source

Mode instabilities in large-mode-area fiber amplifiers

2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC, 2013
The onset of mode instabilities is an effect occurring in high-average-power fiber lasers and amplifiers when their output average power exceeds a certain threshold value [1]. This effect is characterized by a sudden change of the output beam from an initially stable fundamental mode to a regime with more or less chaotic fluctuations between the ...
T. Eidam, C. Jauregui, H.-J. Otto, F. Jansen, F. Stutzki, J. Limpert, A. Txfcnnermann   +6 more
openaire   +1 more source

Mode coupling in few-mode large-mode-area fibers

SPIE Proceedings, 2014
We present an experimental study on mode coupling characteristics of few-mode large-mode-area (LMA) fibers, which are widely used in high power fiber lasers. The modal power allocation is measured by modal decomposition of the nearfield intensity profile of the output beam.
Changgeng Ye, Joona Koponen, Ville Aallos, Laeticia Petit, Ossi Kimmelma, Teemu Kokki   +5 more
openaire   +1 more source

Filamentation analysis in large-mode-area fiber lasers

Journal of the Optical Society of America B, 2006
We drive an analytic expression for filament gain in fiber lasers due to self focusing. The filamentation process has two thresholds that must be met, with beam-quality degradation occurring for peak powers above a megawatt.
L. Sun, J. R. Marciante
openaire   +1 more source