Design and analysis of a multilayer cladding large-mode-area optical fibre

Kumar, Ajeet; Rastogi, Vipul

doi:10.1088/1464-4258/10/01/015303

Cited by 38 publications

(19 citation statements)

References 20 publications

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“…Several structures have been proposed that maintain effective single mode operation for large mode area by offering larger losses to the HOMs compared to the Fundamental Mode (FM), e.g. low-NA Step Index Fibers (SIFs) [5,6], Photonic Crystal Fibers (PCFs) [7], Leakage Channel Fibers (LCFs) [8], 2-D All Solid Photonic Band Gap Fibers (2D-ASPBGFs) [9], Bragg fibers [10], and tailored cladding fibers [11].…”

Section: Introductionmentioning

confidence: 99%

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Bending performance of large mode area multi-trench fibers

Jain¹,

Baskiotis²,

Sahu³

2013

Opt. Express

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Bending performance of the Multi-trench Fibers (MTFs) has been investigated using the Finite Element Method. Numerical investigations show that MTFs can provide low-loss effective single mode operation under bent configuration, thanks to the resonant coupling of the Higher order Modes (HOMs). Large ratio between the HOMs and the Fundamental Mode (FM) losses can be ensured, although the ratio drops with increasing Effective Area (A eff ) of the FM. MTFs provide better losses ratio between the HOMs and the FM in comparison with other fibers like step-index, W-type, and parabolic fibers.

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Section: Introductionmentioning

confidence: 99%

“…Moreover, these fibers suffer from reduced cladding-pumping efficiency due to the presence of high index rods in the cladding. Fibers having tailored cladding for HOMs suppression are also limited in mode area scaling [11].…”

Section: Introductionmentioning

confidence: 99%

Bending performance of large mode area multi-trench fibers

Jain¹,

Baskiotis²,

Sahu³

2013

Opt. Express

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“…On the other hand, the thicknesses of the high and low index layers should be chosen carefully [11]. In order to filter HOM or SRS more efficiently, the resonant coupling principle was proposed [12], [13]. Based on this principle, the fibers introduce a high index ring in the cladding to couple HOM or SRS out of the core resonantly.…”

Section: Introductionmentioning

confidence: 99%

Fiber With Comb-Index Core Designed for High-Power Fiber Lasers

Liu

Wang

2015

IEEE J. Quantum Electron.

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A comb-index core fiber (CIF) designed for high-power fiber lasers is proposed, in which the index distribution in the fiber core is comb-like. It is shown that the advantages of the CIFs include few guiding modes, excellent beam quality, large mode area, high optical damage threshold, and high tolerance to fabrication errors. Compared with the conventional single step fiber with the same normalized frequency V , the mode number of CIFs decreases from dozens to only a few ones and single-mode operation is achievable under certain conditions or with the help of fiber bending. The mode profile of LP 01 is close to Gaussian shape, which guarantees the beam quality to be of nearly diffraction limit. Meanwhile, the mode area increases by 50%-100% depending on different V values. The maximum power supported by the CIF increases by more than 100%. Finally, 30% fabrication errors on the refractive index and the ring thicknesses have only a little influence on the mode properties of CIFs, which is favorable in practical application.Index Terms-Fiber lasers, optical fibers, large mode area fibers, fiber design.

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“…Moreover, these designs have their own problems such as PCF and H-PCF suffer from problem of cleaving and splicing of fibers due to presence of air holes [12], 2D-ASPBGF suffers from reduced cladding pump efficiency due to presence of high index Ge doped rods in cladding [13], and Bragg fiber suffers from unwanted coupling between core and ring modes due to imperfections in high index rings in realized fiber [14]. In addition to all these fibers, there have been several proposals of several fiber designs having additional layer or rings or tailored cladding around the core [15][16]. The suppression of HOMs is based on resonant coupling of HOMs to ring or layer or tailored cladding modes.…”

Section: Introductionmentioning

confidence: 99%

Extending single mode performance of all-solid large-mode-area single trench fiber

Jain¹,

Jung²,

Núñez-Velázquez³

et al. 2014

Opt. Express

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Abstract:We report a novel "single trench fiber" design for mode area scaling of the fundamental mode while offering effective single mode operation for a compact fiber laser device. This fiber design allows very high suppression of the higher order modes by offering high loss and power delocalization. It has the advantages of low cost and easy fabrication thanks to all solid fiber design, cylindrical symmetry, and higher refractive index of core as that of the cladding. A Yb-doped single trench fiber with a 40µm core diameter has been fabricated from modified chemical vapor deposition process in conjunction with solution-doping offering an effective mode area of as large as ~1,000µm 2 at 1060nm for the bend radius of 20cm. Detailed characterizations confirm a robust single mode behavior of the fiber. Comparative analysis with other fiber designs shows significant performance enhancement of effective single mode operation suitable for fiber laser applications.

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Design and analysis of a multilayer cladding large-mode-area optical fibre

Cited by 38 publications

References 20 publications

Bending performance of large mode area multi-trench fibers

Bending performance of large mode area multi-trench fibers

Fiber With Comb-Index Core Designed for High-Power Fiber Lasers

Extending single mode performance of all-solid large-mode-area single trench fiber

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