Management of the high-order mode content in large (40 μm) core photonic bandgap Bragg fiber laser

Gaponov, Dmitry; Fevrier, Sébastien; Devautour, Mathieu; Roy, Philippe; Likhachev, Mikhail E.; Aleshkina, Svetlana S.; Salganskii, M.Y.; Yashkov, Mikhail V.; Gur'yanov, A N

doi:10.1364/ol.35.002233

Cited by 34 publications

(13 citation statements)

References 8 publications

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“…Hence the FOM will experience the highest gain and dominate the modal distribution at the laser output. A few recent fiber designs include the chirally-coupled core fiber (HOMs are coupled to and shed from one or more satellite waveguides that form a helix around the fiber core) [11], photonic bandgap Bragg fiber (where only the FOM propagates with low loss) [12], solid photonic bandgap fibers (where bending loss is exacerbated on HOMs relative to the FOM) [13], leakage channel fibers (wherein all modes are lossy, but the loss is minimized for the FOM) [14], and selectively-doped triple clad fibers (where the FOM has the highest overlap with the active region in the fiber) [15]. While there is clearly no shortage of methods utilized to improve the beam quality from an LMA fiber, such fibers generally are quite complex in their cross-sectional geometries.…”

Section: Resultsmentioning

confidence: 99%

Materials Development for Next Generation Optical Fiber

Ballato

Dragic

2014

Materials

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Optical fibers, the enablers of the Internet, are being used in an ever more diverse array of applications. Many of the rapidly growing deployments of fibers are in high-power and, particularly, high power-per-unit-bandwidth systems where well-known optical nonlinearities have historically not been especially consequential in limiting overall performance. Today, however, nominally weak effects, most notably stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS) are among the principal phenomena restricting continued scaling to higher optical power levels. In order to address these limitations, the optical fiber community has focused dominantly on geometry-related solutions such as large mode area (LMA) designs. Since such scattering, and all other linear and nonlinear optical phenomena including higher order mode instability (HOMI), are fundamentally materials-based in origin, this paper unapologetically advocates material solutions to present and future performance limitations. As such, this paper represents a ‘call to arms’ for material scientists and engineers to engage in this opportunity to drive the future development of optical fibers that address many of the grand engineering challenges of our day.

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Section: Resultsmentioning

confidence: 99%

Materials Development for Next Generation Optical Fiber

Ballato

Dragic

2014

Materials

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“…Since the grating crosssection is no longer determined by the dopant concentration, more elaborate fiber grating designs are possible: e. g. grating structures within the cladding or highly localized intracore modifications. Especially the latter enable new grating designs that tap the huge potential of higher-order fiber modes [166,167]. Specially polarized feedback can be obtained, e. g. a fully radially polarized beam [168].…”

Section: Discussionmentioning

confidence: 99%

Femtosecond pulse written fiber gratings: a new avenue to integrated fiber technology

Thomas

Voigtländer

Becker

et al. 2012

Laser & Photonics Reviews

160

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The use of ultrashort laser pulses for fiber grating inscription has many advantages in comparison to continuous wave and long pulse lasers. The most important one is that it allows inscription in nonphotosensitive fiber materials. In this paper the principal inscription techniques and the physical properties of femtosecond (fs) pulse written in-fiber gratings are reviewed. The role of focusing and order walk-off on the inscribed structures is emphasized. A fs pulse written fiber Bragg grating (FBG) also has a unique coupling behavior, due to a refractive index change that is independent from the fiber geometry. Selected applications of such gratings for sensing and fiber lasers are discussed.

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“…Among these fibers, 2D SC-PBGF [21] and Bragg fibers [24] are two possible options and, in the second case, the classical design has been recently revisited so as to improve the transmission properties of the fiber. More precisely, it has been proposed by our group to replace the high-index rings of classical Bragg fibers by discontinuous rings made of high index rods.…”

Section: Introductionmentioning

confidence: 99%

Extreme large mode area in single-mode pixelated Bragg fiber

Yehouessi¹,

Vanvincq²,

Cassez³

et al. 2016

Opt. Express

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This paper reports the design and the fabrication of an all-solid photonic bandgap fiber with core diameter larger than 100 µm, a record effective mode area of about 3700 µm at 1035 nm and robust single-mode behavior on propagation length as short as 90 cm. These properties are obtained by using a pixelated Bragg fiber geometry together with an heterostructuration of the cladding and the appropriated generalized half wave stack condition applied to the first three higher order modes. We detail the numerical study that permitted to select the most efficient cladding geometry and present the experimental results that validate our approach.

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Management of the high-order mode content in large (40 μm) core photonic bandgap Bragg fiber laser

Cited by 34 publications

References 8 publications

Materials Development for Next Generation Optical Fiber

Materials Development for Next Generation Optical Fiber

Femtosecond pulse written fiber gratings: a new avenue to integrated fiber technology

Extreme large mode area in single-mode pixelated Bragg fiber

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