Coherent beam combining of active multicore optical fiber

Kochanowicz, Marcin; Dorosz, Dominik; Żmoyda, Jacek

doi:10.1117/12.838293

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…To satisfy the giant demands of the bandwidth for telecommunications or sensing purposes, many different kinds of active and passive multicore fibers (MCF) have been extensively investigated over the past few years to enlarge the signal capacity based on space division multiplexing [6][7][8][9][10][11]. In addition, the MCF can also provide multi-parameter sensing [12][13][14] or high power lasing based on coherent beam combination [15][16][17], ascribing to the multicore structures. However, most of the MCFs are very different from the traditional singlemode fibers (SMF), not only in the physical core distributions but also in their fundamental optical properties.…”

Section: Introductionmentioning

confidence: 99%

High Sensitivity Fiber Refractive Index Sensors Based on Asymmetric Supermodes Interference in Tapered Four Core Fiber

et al. 2022

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We demonstrate high sensitivity fiber refractive index (RI) sensor based on asymmetric supermode interferences in tapered four core fiber (TFCF). To make TFCF-based RI sensors, the whitelight was launched into any one of the cores to define the excitation orientation and is called a vertex-core excitation scheme. When the four-core fiber (FCF) was gradually tapered, the four cores gathered closer and closer. Originally, the power coupling occurred between its two neighboring cores first and these three cores are grouped to produce supermodes. Subsequently, the fourth diagonal core enters the evanescent field overlapping region to excite asymmetric supermodes interferences. The output spectral responses of the two cores next to the excitation core are mutually in phase whereas the spectral responses of the diagonal core are in phase and out of phase to that of the excitation core at the shorter and longer wavelengths, respectively. Due to the lowest limitation of the available refractive index of liquids, the best sensitivity can be achieved when the tapered diameter is 10 μm and the best RI sensitivity S is 3249 nm/RIU over the indices ranging from 1.41–1.42. This is several times higher than that at other RI ranges due to the asymmetric supermodes.

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Section: Introductionmentioning

confidence: 99%

High Sensitivity Fiber Refractive Index Sensors Based on Asymmetric Supermodes Interference in Tapered Four Core Fiber

et al. 2022

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“…The far field diffraction pattern in the Fraunhofer diffraction region is determined according to Eq. (1) [36,37].…”

Section: Double-clad Multicore Optical Fiber Doped With Ndmentioning

confidence: 99%

Fibre lasers - conditioning constructional and technological

Zając¹,

Dorosz²,

Kochanowicz³

et al. 2010

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Beam Quality of Multicore Fibre Lasers

et al. 2010

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In the paper the beam quality of the phase-locked multicore fibre lasers was investigated. The beam quality factor (BQF) of the coherently combined beam of the multicore fibre lasers should be determinate as the laser optical output power in a central peak far-field bucket divided by the total optical output power radiating from the effective near-field. Classical M 2 factor is not proper for evaluating the beam quality of phase-locked multicore fibre lasers because it degrades with the increasing number of cores. The beam quality factor of the manufactured multicore fibres equals: 7-core hexagonal structure fibre (BQF = 0.71, V = 2.4), 5-core (BQF = 0.70, V = 2.4), 30-core circular structure of core optical fibre laser possesses the lowest beam quality factor (BQF = 0.48, V = 2.4). However, the angular divergence of the central peak is reduced in proportion to the number of cores generating mutually coherent radiation. Numerical simulation shows that standard deviation of the phase error below 15• has an inconsiderable impact on the laser beam quality. The luminescence spectra of the fabricated constructions: 5-core, 7-core and 30-core double clad multicore optical fibres doped with Nd 3+ were measured.

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Coherent beam combining of active multicore optical fiber

Cited by 3 publications

References 8 publications

High Sensitivity Fiber Refractive Index Sensors Based on Asymmetric Supermodes Interference in Tapered Four Core Fiber

High Sensitivity Fiber Refractive Index Sensors Based on Asymmetric Supermodes Interference in Tapered Four Core Fiber

Fibre lasers - conditioning constructional and technological

Beam Quality of Multicore Fibre Lasers

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