Equivalence between in-phase and antiresonant reflection conditions in Bragg fiber and its application to antiresonant reflecting optical waveguide-type fibers

Sakai, Jun–ichi; Suzuki, Yuta

doi:10.1364/josab.28.000183

Cited by 8 publications

(20 citation statements)

References 28 publications

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“…Equivalence between the in-phase (generalized quarter-wave stack) and antiresonant reflection conditions in the Bragg fiber was shown in Ref. [10].…”

Section: Introductionmentioning

confidence: 94%

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Hollow core Bragg fiber with antiresonant intermediate layer

2016

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By means of the transfer matrix method, the optical properties of fibers with a distinct intermediate layer between a hollow core and periodic cladding are calculated. The periodic cladding consists of two types of the alternating layers. The intermediate layer has distinct thickness and refractive index. Depending on these parameters, the fiber can work in the single-mode or multi-mode regimes. In the multi-mode regime, the optical loss of the smallest loss mode can be decreased by increasing the thickness of the layer. In the single-mode regime, the optical loss falls with a rise in the refractive index of the intermediate layer. The optical properties of the fiber are determined by the antiresonance reflection from the intermediate layer and the Bragg reflection from the periodic cladding. Selecting the parameters of the intermediate layer, the optical loss of the fiber in the single-mode regime can be reduced by an order of magnitude over the loss of the traditional Bragg fiber.

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“…Equivalence between the in-phase (generalized quarter-wave stack) and antiresonant reflection conditions in the Bragg fiber was shown in Ref. [10].…”

Section: Introductionmentioning

confidence: 94%

“…When n ef lies in the vicinity of this value, the waveguide has a transmission window. This window is due to the in-phase reflection condition [10]. By varying d M or n M , each root curve falls within the transmission window only once.…”

Section: Geometry Of Bragg Fiber With Intermediate Layermentioning

confidence: 99%

Hollow core Bragg fiber with antiresonant intermediate layer

2016

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“…The QWS condition, κ a a κ b b π=2, has been introduced as a condition where an optical wave is efficiently confined to the core in the Bragg fiber [4]. The QWS condition has been extended to a generalized QWS condition [24]. A phase theory showed [24] that the in-phase condition at the core-cladding interface is equivalent to the generalized QWS condition in the one-dimensional and cylindrically symmetric two-dimensional structures with periodic cladding and that the generalized QWS condition is identical with the central gap point in the SPARROW model [18].…”

Section: Several Expressions Of Qws Conditionmentioning

confidence: 99%

“…where q 1 and q 2 are integers with q 2 ≥ q 1 ≥ 1 [24]. Here, U QWS is a parameter explained later in Eq.…”

Section: Several Expressions Of Qws Conditionmentioning

confidence: 99%

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Analytical expression of core and cladding material losses effect in Bragg fibers using the perturbation theory

Sakai

2011

J. Opt. Soc. Am. B

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We present an analytical expression of fiber loss caused by core and cladding material losses for the TE mode of hollow-core and nonhollow-core Bragg fibers using the perturbation theory. The fiber loss agrees well with previous numerical results. Under the quarter-wave stack (QWS) condition, the expression gives the explicit dependence of the fiber loss on the fiber structural parameters, the wavelength, and the mode. The combined effect of the material with the confinement losses is also studied. It is quantitatively revealed that the core material loss affects the fiber loss much more than the cladding material losses, depending on the optical power confinement factor. The position of the minimum fiber loss corresponds well to the condition satisfying a generalized QWS condition even in the nonhollow-core Bragg fibers.

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Dielectric laser accelerators

England¹,

Noble²,

Bane³

et al. 2014

Rev. Mod. Phys.

330

184

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The use of infrared lasers to power optical-scale lithographically fabricated particle accelerators is a developing area of research that has garnered increasing interest in recent years. We review the physics and technology of this approach, which we refer to as dielectric laser acceleration (DLA). In the DLA scheme operating at typical laser pulse lengths of 0.1 to 1 ps, the laser damage fluences for robust dielectric materials correspond to peak surface electric fields in the GV/m regime. The corresponding accelerating field enhancement represents a potential reduction in active length of the accelerator between 1 and 2 orders of magnitude. Power sources for DLA-based accelerators (lasers) are less costly than microwave sources (klystrons) for equivalent average power levels due to wider availability and private sector investment. Due to the high laser-to-particle coupling efficiency, required pulse energies are consistent with tabletop microJoule class lasers. Combined with the very high (MHz) repetition rates these lasers can provide, the DLA approach appears promising for a variety of applications, including future high energy physics colliders, compact light sources, and portable medical scanners and radiative therapy machines.

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Equivalence between in-phase and antiresonant reflection conditions in Bragg fiber and its application to antiresonant reflecting optical waveguide-type fibers

Cited by 8 publications

References 28 publications

Hollow core Bragg fiber with antiresonant intermediate layer

Hollow core Bragg fiber with antiresonant intermediate layer

Analytical expression of core and cladding material losses effect in Bragg fibers using the perturbation theory

Dielectric laser accelerators

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