Single-Mode Segmented Cladding Fibers for the Middle Infrared

Millo, Arnon; Naeh, Itay; Katzir, Abraham

doi:10.1109/jlt.2007.899770

Cited by 23 publications

(5 citation statements)

References 21 publications

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“…Highindex segments of the cladding pull the field toward the outer cladding region. After benchmarking the [1,3]. Since this value of birefringence is extremely small and of the order of computational accuracy we focus on, the study of the birefringence in an elliptical SCF.…”

Section: Finite Element Analysis and Results For The Circular Scfmentioning

confidence: 99%

“…Such a fiber is highly desirable in high-power fiber lasers [1], dense wavelength division multiplexing optical communication systems, and midinfrared sensing [2,3]. SCFs have been fabricated in polymer [4,5] and silver halide glass [3] and have experimentally demonstrated LMA operation. The working principle of the SCF is mode filtering: A high differential leakage loss between the fundamental and the higher order modes along with nominal loss to the fundamental mode ensures effective SM behavior of the SCF.…”

Section: Introductionmentioning

confidence: 99%

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Birefringence analysis of segmented cladding fiber

et al. 2012

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This is the unspecified version of the paper.This version of the publication may differ from the final published version. We present a full-vectorial modal analysis of a segmented cladding fiber (SCF). The analysis is based on the H-field vectorial finite element method (VFEM) employing polar mesh geometry. Using this method, we have analyzed the circular SCF and the elliptical SCF. We have found that the birefringence of the circular SCF is very small (1.0 × 10 −8 ). Birefringence of a highly elliptical SCF can be altered to some extent by the number of segments and duty cycle of segmentation in the segmented cladding. However, the change is not profound. The analysis shows that the circular SCF possesses low birefringence and that the segmented cladding does not add any significant birefringence in an elliptical fiber. This result strongly indicates that small deviations in the segmented cladding parameters arising from fabrication process do not significantly affect the birefringence of the fiber. Permanent repository link

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Section: Finite Element Analysis and Results For The Circular Scfmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Birefringence analysis of segmented cladding fiber

et al. 2012

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“…Previously, SCFs have been fabricated using materials such as poly (methyl methacrylate) [24][25][26] and other types of polymer composites [27]. Silica-based glass SCF fabrication with four segments, in which the interfaces of segments with undoped and doped material bubbles have been generated, has been reported [28].…”

Section: Introductionmentioning

confidence: 99%

The Optimization of a Segmented Cladding Fiber via the Response Surface Methodology Approach for a Large Mode Area

et al. 2023

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In this work, we have proposed and optimized a segmented cladding fiber (SCF) with a large mode area (LMA) consisting of a uniform core and a double cladding. The outer cladding of the SCF consisted of a periodic alternation of high- and low-refractive-index segments, while the inner cladding consisted of a resonant layer of rods surrounded by high-refractive-index rings. The three geometrical parameters chosen as design variables were the (a) doped rod refractive index differences, (b) refractive index differences of rings, and (c) ring thickness. Using the Box–Behnken approach, we selected thirteen different design cases and modeled them numerically using the finite element method (FEM). In order to optimize the features of the proposed fiber, such as the effective mode area (EMA), we applied response surface methodology (RSM). The EMA of the optimal SCF was significantly improved and markedly enlarged to about 706 µm2 at a wavelength of 1.550 µm. Different properties of the optimized double-cladding octo-wing SCF (DC-OW-SCF), such as confinement losses in the core mode and the first higher-order mode, were studied. The DC-OW-SCF offers the advantages of feasibility in fabrication using the powder-in-tube (PIT) method and provides the possibility of utilization in compact amplifier devices and high-power fiber lasers.

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“…Its propagation characteristics revealed the potential of SM operation over a wide range of operating wavelengths. Subsequently, SM operation in the SCF made of silver halide materials for the middle infrared was achieved in 2007 [28]. In 2016, the research on the bending performance of the SCF demonstrated the feasibility of SM operation with a large mode area under bending configuration [29].…”

Section: Introductionmentioning

confidence: 99%

Segmented Cladding Fiber With a High-Index Ring in Core for Wideband Single-Mode Operation in Any Bending Orientation

Guo

Ning

et al. 2021

IEEE Photonics J.

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A resonant-ring-assisted large mode area segmented cladding fiber (RR-SCF) with a high-index ring in the core is proposed. Numerical investigations of the effects of the high-index ring on the leakage losses of guiding modes, mode area, and electric field distribution of FM in the proposed fiber show the high-index ring not only increases the ratio of the loss between the fundamental mode (FM) and the higher-order modes (HOMs) but also improves the electric field distribution of the FM to be flat. By taking these advantages of the high-index-ring-assisted core, the effective single-mode (SM) operation is achieved in the proposed fiber bent in any orientation, which makes up the defect of the conventional RR-SCF that the SM output is affected by the bending orientation. Meanwhile, the mode area is enlarged. Furthermore, the effects of the heat load, duty cycle, bending, and operation wavelength on the fiber performance are analyzed. The results show single-mode operation in all bending orientations with a mode area larger than 824 μm 2 can be achieved at a tight bending radius of 15 cm to 16 cm when the operating wavelength ranges from 1.06 μm to 1.76 μm. This fiber shows great potential in high-power fiber lasers.

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Single-Mode Segmented Cladding Fibers for the Middle Infrared

Cited by 23 publications

References 21 publications

Birefringence analysis of segmented cladding fiber

Birefringence analysis of segmented cladding fiber

The Optimization of a Segmented Cladding Fiber via the Response Surface Methodology Approach for a Large Mode Area

Segmented Cladding Fiber With a High-Index Ring in Core for Wideband Single-Mode Operation in Any Bending Orientation

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