Beam Quality of Multicore Fibre Lasers

Kochanowicz, Marcin; Dorosz, Dominik; Żmojda, Jacek; Dorosz, Jan

doi:10.12693/aphyspola.118.1177

Cited by 11 publications

(4 citation statements)

References 12 publications

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“…Double-clad multicore optical fibers offer new possibilities in constructing of high-power short-length fiber lasers [31][32][33][34][35]. The main advantage is higher concentration of embedded rare earth ions than in typical single-core fibers which is proportional to the number of cores.…”

Section: Multicore Optical Fibersmentioning

confidence: 99%

Novel constructions of optical fibers doped with rare – earth ions

Dorosz¹

2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. In the paper the research on rare-earth doped and co-doped optical fibre conducted in the Laboratory of Optical Fiber Technology at the Bialystok University of Technology is presented. Novel active fibre constructions like multicore, helical-core and side detecting ribbon/core optical fibers were developed with a targeted focus into application. First construction i.e. multicore RE doped optical fibers enable supermode generation due to phase -locking of laser radiation achieved in a consequence of exchanging radiation between the cores during the laser action. In the paper a far -field pattern of 19 -core optical fiber-doped with Yb 3+ ions, registered in the MOFPA system, showed centrally located peak of relatively high radiation intensity together with smaller side-lobes. Another new construction presented here is helical-core optical fibers with the helix pitch from several mm and the off-set ranging from 10 µm to 200 µm. The properties of helical-core optical fiber co-doped with Nd 3+ /Yb 3+ were also discussed. In the field of sensor applications novel construction of a sidedetecting luminescent optical fiber for an UV sensor application has been presented. The developed optical fiber with an active core/ribbon, made of phosphate glass doped with 0.5 mol% Tb 3+ ions, was used as a UV sensing element.

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Section: Multicore Optical Fibersmentioning

confidence: 99%

Novel constructions of optical fibers doped with rare – earth ions

Dorosz¹

2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…It is defined as the ratio of optical power contained in the central peak to the total optical power of the beam in the near field [20,21]. Hence, the parameter is dependent solely on the filling factor of the matrix of emitters (t = (d − 2r)/2r, where d -distance between cores, 2r -core diameter), and not on the number of the cores.…”

Section: Impact Of the Construction Parameters Of An Active Multicorementioning

confidence: 99%

Phase-locking of 19-core Yb3+ - doped optical fibre

Kochanowicz¹,

Dorosz²,

Zając³

2011

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. The supermode generation in a multicore optical fibre laser can be realised by phase-locking of radiation inside of the fibre. The model proposed by authors implies the achievement of supermode generation by exchanging radiation between the cores during the development of the laser action. The analysis of the impact of coupling value between the cores on phase radiation of particular emitters was considered. In the paper the phase-locking of 19-core optical fibre doped with Yb 3+ ions is presented. The analysis of material and geometrical parameters of the active 19 -core optical fibre and phase deviation on the beam quality factor of the laser beam in the far-field diffraction region has been analysed. The beam quality factor of the manufactured multicore fibre equals BQF = 0.71, V = 2.4, d = 18 µm. As a result of the conducted analysis a double-clad 19 -cores optical fibre doped with ytterbium ions has been designed and fabricated and its luminescence spectra and far-field diffraction pattern have been measured. Registered in the experiment in MOFPA system far-field pattern showed centrally located peak of relatively high radiation intensity together with smaller side-lobes, and as such was similar to the pattern which had been obtained numerically.

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“…Multicore fibre (MCF) development, a recent advancement of fibre optical technology driven by huge demand for transmission capacity of a single fibre and long-haul communication with dense space-division multiplication, was reported [9][10][11][12]. In addition, key applications utilizing MCF such as fibre laser [13,14] and fibre optical sensors [15,16], were immediately followed. For these applications, existing device such as fibre gratings and optical couplers may be useable but requiring multiple splitting and combining between single core and multicore fibre.…”

Section: Introductionmentioning

confidence: 99%

Fibre Bragg grating inscription into a seven core fibre and its application as a vector bending sensor

Sahoo

Bao

Liu

et al. 2021

Optical Sensors 2021

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This paper demonstrates a highly effective method for fibre Bragg grating (FBG) inscription into a seven core fibre (7CF) and its application as an effective vector bending sensor. The development of multicore fibres (MCFs) and enabling the fabrication of FBGs into them result in a solution for multi-parameter measurements such as temperature/strain/bending/twist. The FBG in the central core of 7CF is on the neutral axis and therefore it is sensitive only to thermal and insensitive to deformational change, whereas the FBGs in the none-central cores that are evenly distributed over the 7CF cross-section can facilitate the measurement of structure deformation, such as bending, loading and twist. Furthermore, the FBGs in different cores respond to the physical perturbations differently in various orientations, offering vector sensing to measure both amplitude and direction of the structure change. The 7CF-FBG sensors are highly applicable for mechanical structures and flexible medical instruments.

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Beam Quality of Multicore Fibre Lasers

Cited by 11 publications

References 12 publications

Novel constructions of optical fibers doped with rare – earth ions

Novel constructions of optical fibers doped with rare – earth ions

Phase-locking of 19-core Yb3+ - doped optical fibre

Fibre Bragg grating inscription into a seven core fibre and its application as a vector bending sensor

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