Low-loss singlemode large mode area all-silica photonic bandgap fiber

Fevrier, Sébastien; Jamier, Raphaël; Blondy, Jean‐Marc; Semjonov, S. L.; Likhachev, Mikhail E.; Bubnov, M M; Dianov, E. M.; Khopin, V. F.; Salganskii, M.Y.; Guryanov, A. N.

doi:10.1364/opex.14.000562

Cited by 88 publications

(44 citation statements)

References 15 publications

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“…It is evidently that the main part of the splice loss value is due to "cut" of the hybrid mode power propagating in the high index ring-layer. Narrow intensive peaks in the spectrum are caused by the coupling between the core mode and the cladding modes localized in the high-index rings as it was explained previously [8].…”

Section: Design Of the Hybrid Fiber With One Ring Layersupporting

confidence: 57%

Low-loss hybrid fiber with zero dispersion wavelength shifted to 1 μm

et al. 2014

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We propose a novel cylindrically symmetric hybrid fiber design that allows combining properties of the both fibers guiding light due to total internal reflection (low optical losses) and photonic bandgap fibers (anomalous dispersion at 1 μm). Refractive index profile of these fibers consist of the only few layers: low-index core (n core -n silica >0) surrounded with one or more high-index ring layers (n high -n core >0), a depressed layer (n depress -n silica <0) and silica cladding. Operating mode is one of the high-order modes (depending on high-index ring layers number) with intensity maximum at fiber axis. Because the other modes (including the fundamental mode LP 01 ) are guided in the high-index ring layer(s) the hybrid mode can be easily excited by splicing hybrid fiber and standard single-mode (λ~1μm) step-index fiber with appropriate mode field diameter. Moreover method of achievement of asymptotically singlemode regime of light propagation (suppression of the high-index ring layer modes) has been proposed. The main idea of it is doping narrow strong absorbing layer where hybrid mode has intensity of electric field closed to zero. Furthermore we have considered possibility to increase anomalous dispersion of the hybrid fiber (up to 100 ps/nm km) by usage more complicated refractive index profile with two high-index ring layers.In this work we have fabricated the technologically simplest hybrid fiber with the only one high-index layer. The hybrid LP 02 core mode had dispersion of 13 ps/(nm km) and optical loss of about 6 dB/km. Propagation of chirped pulses through the fabricated hybrid fiber allowed us to compress them from 8ps to 330fs.

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Section: Design Of the Hybrid Fiber With One Ring Layersupporting

confidence: 57%

Low-loss hybrid fiber with zero dispersion wavelength shifted to 1 μm

et al. 2014

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“…Through appropriate design, this feature has been gainfully exploited to lower the loss of the FM while allowing the HOMs to exhibit larger losses [7]. The loss of the first higher order LP 11 mode usually determines the length of fibre required to make it effectively single-moded.…”

Section: Fibre Designmentioning

confidence: 99%

Soft Glass Based Large Mode Area Photonic Bandgap Fibre for Mid-Infrared Applications

Ghosh

Dasgupta

Poletti

et al. 2011

Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2011

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An all-solid LMA Bragg fibre (mode area exceeding 1100µ m 2 ) is presented for midinfrared applications, based on a new design strategy that induces large differential loss between fundamental and higher order modes for effective single-mode operation. OCIS codes: (060.4005) Microstructured fibres (060.2280) Fibre design and fabrication IntroductionThe mid-infrared (IR) wavelengths (2-25µ m) have recently become increasingly important due to emerging applications in areas such as mid-IR spectroscopy for astronomy, optical coherence tomography, and chemical sensing. This has spawned wide interest in the development of optical fibres that can efficiently guide light and enable high power laser delivery at these wavelengths. Besides the choice of optimum material system, a major challenge in this field is the design of optical fibres that enable efficient distortion-free transmission at high power levels and supplement the design of efficient mid-IR fibre sources. Single-mode large-mode area (LMA) fibres are crucial in this regard because they mitigate the undesirable nonlinear processes (e.g. stimulated Brillouin scattering, stimulated Raman scattering, four-wave mixing) in the fibre that deteriorate their power handling capability. Single-mode LMA fibres based on step index profiles are limited in functionality due to their high bend-loss sensitivity and tight tolerances in fabrication parameters. Thus, more recently, alternative routes have been explored, which have relied on the use of multimode LMA fibres in which effective guidance of the fundamental mode (FM) is achieved by inducing a large differential loss for its higher order modes (HOMs). The necessary differential losses can be engineered through fibre design by a number of means including controlling the inherent modal confinement loss and/or relative bend loss. Techniques that maximize the coupling efficiency into the FM are also critical. Most of these fibre designs are based on microstructured optical fibres (MOFs) that provide unprecedented structural design freedom for controlling their propagation characteristics. In this context, all-solid Bragg fibres are extremely promising as they enable better control over the structural parameters during fibre drawing thereby ensuring good repeatability with minimal transverse deformations and allowing for accurate targeting of the optical characteristics in the final fibre [1,2]. Bragg fibres can also provide considerably lower bending losses as compared to MOFs (with air holes) with the same size of the mode field [3]. The highly nonlinear non-silica based glasses are promising candidates for fabricating the mid-IR fibres owing to their good transparency across the mid-IR wavelength spectrum [4]. Due to their lower toxicity, higher thermal stability, and mature fabrication process, the lead-silicate glasses are attractive for fabrication of fibres and fibrebased devices operating in the wavelength range of 2-5µ m [5]. In this paper, we report a new design strategy to realize a soft glass (lead s...

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“…The OmniGuide fiber with dielectric-dielectric periodic multilayer cladding could be permitted to obtain a very broad-band single mode operation, and the effective large mode area has been confirmed [11,12]. And the excellent distortion characteristics of the hollow OmniGuide fiber has been reported [13].…”

Section: Introductionmentioning

confidence: 99%