Results 261 to 270 of about 330,462 (300)

Photonic crystal fiber couplers based on large mode area fibers

SPIE Proceedings, 2011
The comparison of two types of photonic crystal fiber coupler (PCFC) based on LMA8 and LMA10 fibers are presented in this paper. The couplers preparation process based on biconical fiber technique without air-holes collapsing. The same parameters of elongation process have given slightly different results.
Paweł Marć, Karol Stasiewicz, Leszek R. Jaroszewicz, Tomasz Nasilowski, Michał Szymański   +4 more
openaire   +1 more source

Large-mode-area Fiber with Non-circular Cores

2018 23rd Opto-Electronics and Communications Conference (OECC), 2018
A non-circular core Yb-doped fiber was fabricated in-house. Nearly 200 W output power was obtained with this fiber in a linear cavity. The slope efficiency was 67%. The measured $M_{x,y}^2$ was 1.5 and 3.1, respectively.
J. Ji, H. Lin, R. Sidharthan, D. Ho, Y. Zhou, N. Xia, J. Nilsson, S. Yoo   +7 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

Bending insensitive large mode area photonic crystal fiber

Optik, 2011
A novel kind of large mode area photonic crystal fibers (PCFs) are proposed in this paper. In order to achieve large effective mode area, a novel technique is applied to seven missing air hole PCF structures. The modal characteristics of PCF structures such as effective mode area, confinement loss, chromatic dispersion properties with doped cores, are ...
H. Ademgil, S. Haxha
openaire   +1 more source

Extra-Large-Mode-Area Few-Mode Laser Fiber

Asia Communications and Photonics Conference 2016, 2016
An Yb-doped extra-large-mode-area few-mode laser fiber was fabricated successfully by chelate precursor doping technique. With refractive index difference of 0.0004 and numerical aperture of 0.036, the $25-\mu \text{m}$ -core fiber possesses extra-large-mode-area and few-mode properties.
Zhaonian Jia, Huan Zhan, Yuying Wang, Cong Gao, Li Ni, Xiaolong Wang, Aoxiang Lin   +6 more
openaire   +1 more source

Measuring bend losses in large-mode-area fibers

SPIE Proceedings, 2015
We investigate the measurement of bend losses in few-mode large-mode-area (LMA) fibers. The influence of the light source spectral characteristics, modal power content and cladding light on the measurement accuracy and precision is studied experimentally. Monte-Carlo simulations are performed to understand the distribution of the variations. This study
Changgeng Ye, Joona Koponen, Ville Aallos, Teemu Kokki, Laeticia Petit, Ossi Kimmelma   +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

Single-mode large-mode-area Er-Yb fiber

Optical Components and Materials XVI, 2019
Single-mode Er-Yb fibers based on phosphorosilicate glass matrix highly doped with fluorine have been fabricated using modified all-gas phase MCVD technology. Fibers have core doped by 6.5 mol.% of P2O5, 0.9 wt.% of F and different concentration of Er and Yb. The core NA was about 0.07-0.08 relative to the pure silica level.
Maxim Khudyakov, Aleksey Lobanov, Denis Lipatov, Konstantin Bobkov, Svetlana Aleshkina, Tatyana Kochergina, Mikhail Bubnov, Alexey Abramov, Nikolai Vechkanov, Aleksey Guryanov, Mikhail E. Likhachev   +10 more
openaire   +1 more source

Rectangle Lattice Large Mode Area Photonic Crystal Fiber

Optical Fiber Communication Conference, 2014
A rectangle-lattice photonic crystal fiber with a mode area of 2471 μm2 is successfully fabricated for the first time.
Xin Wang, Shuqin Lou, Wenliang Lu
openaire   +1 more source