Improved all-silica endlessly single-mode photonic crystal fiber

Nielsen, M.D.; Mortensen, Nicolai F.; Folkenberg, Jacob Riis; Petersson, A.; Bjarklev, Anders

doi:10.1109/ofc.2003.316149

Cited by 11 publications

(8 citation statements)

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“…In an interesting and significant development, recent fibre lasers have included a photonic crystal structures (or air-silica structure) within the air-clad surrounding the core, primarily to achieve a novel way of increasing lasing mode area [53,54,[78][79][80]. This is important since scaling of fibre lasers to the kW regime must be accompanied by large mode area such that the local intensity does not exceed a practical level before nonlinear effects become significant.…”

Section: Structuring the Waveguide Inside The Air-clad Double Claddinmentioning

confidence: 99%

Fibre lasers and related technologies

Canning

2006

Optics and Lasers in Engineering

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Section: Structuring the Waveguide Inside The Air-clad Double Claddinmentioning

confidence: 99%

Fibre lasers and related technologies

Canning

2006

Optics and Lasers in Engineering

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“…14,15 In fact the second order mode is no longer guided when its n ef f becomes lower than the n F SM at the same wavelength λ. As a consequence, by applying the condition n ef f = n F SM , it is possible to obtain the normalized cutoff wavelength λ * /Λ.…”

Section: Cutoff Wavelengthmentioning

confidence: 99%

“…14 A possible solution to these problems is to consider another LMA PCF design based on the triangular lattice, which has been recently presented. 14,15 The proposed fibers, called 3-rod core triangular PCFs, are characterized by a triangular core region, obtained by removing 3 air-holes in the center of the cross-section. It has been demonstrated that they can provide an enhancement of the guided mode area of about 30% and a higher robustness when scaled to a larger pitch.…”

Section: Introductionmentioning

confidence: 99%

“…The phase diagram which provides the boundary between the two operation regions obtained with this method has been confirmed with a second approach, based on the comparison between the first higher order mode effective index and the one of the microstructured cladding fundamental space-filling mode. 14,15 The previous informations about the single-mode regime boundary have been used to evaluate also the cutoff value V * of the normalized frequency V . An expression of the V parameter already used for traditional triangular PCFs has been considered, 8,16 by properly choosing the value of the effective core radius, which is one of the critical parameters involved in the V definition.…”

Section: Introductionmentioning

confidence: 99%

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New design of single-mode large-mode-area photonic crystal fibers

et al. 2005

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Triangular photonic crystal fibers with different core geometries have been investigated, in order to design single-mode large mode area fibers. In particular, 7-rod core fibers, obtained by removing the central air-hole and the first six surrounding ones in the transverse section, have been considered. By taking into account the leakage losses of the second-order mode, a phase diagram, which describes the boundary between the single-mode and multi-mode operation regimes, as well as the endlessly single-mode region, has been evaluated. Moreover, starting from this analysis, the cutoff normalized frequency has been calculated according to a formulation of the V parameter previously adopted for traditional 1-rod core triangular fibers. Simulation results have shown that, for a fixed air-filling fraction, 7-rod core triangular photonic crystal fibers are single-mode in a smaller wavelength range than 1-rod core ones. However, it is possible to obtain high effective area values, as well as single-mode operation, with 7-rod core fibers by considering low air-filling fractions and relatively small hole-tohole distances.

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“…In order to overcome these problems, another LMA PCF design based on the triangular lattice has been recently proposed in [12], [13]. The triangular core region of these fibers, called 3-rod core triangular PCFs, has been obtained by removing 3 air-holes in the center of the fiber cross-section.…”

Section: Introductionmentioning

confidence: 99%

Cutoff properties of large-mode-area photonic crystal fibers

Foroni

Poli

Rosa

et al.

Proceedings of 2005 IEEE/LEOS Workshop on Fibres and Optical Passive Components, 2005.

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The cutoff properties of triangular photonic crystal fibers with different core dimensions have been deeply investigated. In particular, 7-rod core fibers, obtained by removing the air-holes belonging to the first ring, as well as the central one in the fiber cross-section, have been considered. A phase diagram which describes the regions of single-mode and multimode operation for these large mode area fibers has been calculated with two different approaches. Simulation results have demonstrated that, for a fixed air-filling fraction, triangular photonic crystal fibers with a wider silica core region are singlemode in a smaller wavelength range. As a consequence, also the endlessly single-mode region of 7-rod core triangular fibers is smaller than that of 1-rod core ones. However, by properly choosing low air-filling fraction and relatively small hole-to-hole distance, 7-rod core photonic crystal fibers can provide high effective area values, as well as single-mode operation, without the problem of leakage losses.

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Improved all-silica endlessly single-mode photonic crystal fiber

Cited by 11 publications

References 0 publications

Fibre lasers and related technologies

Fibre lasers and related technologies

New design of single-mode large-mode-area photonic crystal fibers

Cutoff properties of large-mode-area photonic crystal fibers

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