Antiresonant.jl
Luna.Antiresonant.VincettiMode
— MethodVincettiMode(a, args...; wallthickness, tube_radius, Ntubes, cladn, Nterms,
loss=true, kwargs...)
Create a mode with Marcatili-like mode fields but loss, dispersion and effective area given by the semi-empirical model developed by Vincetti et al. in refs [1-3]. Arguments are identical to Capillary.MarcatiliMode
but with the following additions/changes as keyword arguments:
Mandatory keyword arguments
wallthickness
: wall thickness of the resonators (cladding capillaries)tube_radius
: radius of the resonatorsNtubes
: number of resonators
Optional keyword arguments
cladn
: refractive index of the resonators as a function of (ω; z). Defaults to the refractive index of silica (SiO2).Nterms
: number of resonator dielectric modes to include in the model. Defaults to 8.loss
: can betrue
orfalse
to switch loss on/off, or aReal
to scale the loss.
To specify the gap between resonators, calculate the core radius with getRco(r_ext, N, δ)
or calculate the external radius of the resonators with getr_ext(Rco, N, δ)
.
References
[1] L. Vincetti Empirical formulas for calculating loss in hollow core tube lattice fibers, Opt. Express, OE, vol. 24, no. 10, pp. 10313-10325, May 2016, doi: 10.1364/OE.24.010313.
[2] L. Vincetti and L. Rosa A simple analytical model for confinement loss estimation in hollow-core Tube Lattice Fibers Opt. Express, OE, vol. 27, no. 4, pp. 5230-5237, Feb. 2019, doi: 10.1364/OE.27.005230.
[3]L. Rosa, F. Melli, and L. Vincetti Analytical Formulas for Dispersion and Effective Area in Hollow-Core Tube Lattice Fibers Fibers, vol. 9, no. 10, Art. no. 10, Oct. 2021, doi: 10.3390/fib9100058.
Luna.Antiresonant.ZeisbergerMode
— MethodZeisbergerMode(args...; wallthickness, kwargs...)
Create a capillary-like mode with the effective index given by eq. (15) in [1].
wallthickness
(mandatory kwarg) sets the thickness of the anti-resonant struts and loss
(optional, defaults to true
) can be either a Bool
(to switch on/off loss completely) or a Real
(to up/down-scale the loss given by the model). Other kwargs are passed on to the constructor of a Capillary.MarcatiliMode
.
[1] Zeisberger, M., Schmidt, M.A. Analytic model for the complex effective index of the leaky modes of tube-type anti-resonant hollow core fibers. Sci Rep 7, 11761 (2017). https://doi.org/10.1038/s41598-017-12234-5
Luna.Antiresonant.getRco
— MethodgetRco(r_ext, N, δ)
Calculate the inscribed core radius of a single-ring antiresonant PCF with N
resonators with external radius r_ext
and a gap between resonators of δ
.
Luna.Antiresonant.getr_ext
— Methodgetr_ext(Rco, N, δ)
Calculate the external radius of the resonators for a single-ring antiresonant PCF with core radius Rco
, N
resonators and a gap between resonators of δ
.
Luna.Antiresonant.getδ
— Methodgetδ(Rco, r_ext, N)
Calculate the gap between resonators in a single-ring antiresonant PCF with inscribed core radius Rco
for N
resonators with external radius r_ext
.