Results 201 to 210 of about 173,725 (252)

Single-mode tellurite glass holey fiber with extremely large mode area for infrared nonlinear applications [PDF]

Optics Express, 2008
We report the fabrication of a large mode area tellurite holey fiber from an extruded perform, with a mode area of 3000µm2. Robust single-mode guidance at 1.55µm was confirmed by both optical measurement and numerical simulation. The propagation loss was
Xian Feng, Wei H Loh, Angela Camerlingo   +2 more
exaly   +2 more sources

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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

Single-polarization large-mode-area fiber laser mode-locked with a nonlinear amplifying loop mirror.

Optics Letters, 2018
The generation of high-power ultrashort pulses from a passively mode-locked fiber laser is reported based on the combination of a single-polarization large-mode-area (LMA) photonic crystal fiber with a nonlinear amplifying loop mirror design.
Wu Liu, Haosen Shi, Jiahua Cui, C. Xie, Youjian Song, Ching-yue Wang, Minglie Hu   +6 more
semanticscholar   +1 more source

Single-modeness of short large mode area fibers: An experimental study

Optics Communications, 2007
Abstract We experimentally investigated the limits to the endlessly single-modeness of large mode area photonic crystal fibers. We analyzed two versions of a commercial large mode area fiber with equal structural parameters but five or seven confining rings, and in both cases we found that the single mode regime becomes critical for short ( 1 m ...
A.M. Grassi, F. Casagrande, M. D'Alessandro, S. Marinoni   +3 more
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Few-mode and large-mode-area fiber with circularly distributed cores

Optics Communications, 2017
Wenxing Jin, Guobin Ren, Youchao Jiang   +2 more
exaly   +2 more sources

Bend-Resistant Large Mode Area Fiber With an Azimuthally Segmented Trench in the Cladding

Journal of Lightwave Technology, 2019
A bend-resistant large mode area fiber with an azimuthally segmented trench in the cladding is proposed and investigated in this paper. The loss ratio of the proposed fiber between the lowest higher order modes (HOMs) and fundamental mode can reach 1000,
Shaoshuo Ma, T. Ning, L. Pei, Jingjing Zheng, Jing Li, Jian Xu, Xueqing He   +6 more
semanticscholar   +1 more source

Photodarkening measurements in large mode area fibers

SPIE Proceedings, 2007
Yb-doped fibers are widely used in applications requiring high average output powers and high power pulse amplification. Photodarkening is one limiting factor in these fibers. In this paper, characterization of photodarkening in large-mode-area (LMA) fibers is presented building upon our previous work, which indicated that meaningful comparison of ...
Joona Koponen, Mikko Söderlund, Hanna J. Hoffman, Dahv Kliner, Jeffrey Koplow   +4 more
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Bend-compensated design of large-mode-area fibers

Optics Letters, 2006
Cone-shaped profiles illustrate the recently proposed bend-compensated strategy for large-mode-area amplifier fiber design. Simulations show that introducing a bend-compensating gradient into the fiber profile simultaneously improves mode area and reduces higher-order-mode impairments in a spooled-fiber amplifier.
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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
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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