Tellurite And Fluorotellurite Glasses For Active And Passive

Glossary; MDO
λ = wavelength
λn = the mean free-path in species n
Λ = optical basicity
m = crystallistion mechanism constant
M = cation
MCA = multi-channel analyser
mg = SEM magnification
ML = Macedo-Litovitz (viscosity model)
µ = reduced mass of bonding atoms
µp = Poisson’s ratio
n = linear refractive index
n2 = non-linear refractive index
N = exchanged ion concentration
N0 = surface exchanged ion concentration
NA = numerical aperture of waveguide
NBO = non-bridging oxygen
ncl = refractive index of optical fibre cladding
nco = refractive index of optical fibre core
NIST = National Institute of Standards and Technology
NM = number of atoms of M per atom of oxygen
NMR = nuclear magnetic resonance
p = average photoelastic constant
P = induced polarisation / dipole
PLA = pressure limiting aperture
PS = pixel size in SEM
πion = electronic polarisability of cation
q = distance between bonding atoms +re
Q = structural unit Q, with m oxygens, bonded to a central cation, n of which oxygens are bridging
n
m
θ = critical angle for total internal reflection (2θ angle used in XRD for miller indices reflections of crystal)
r = radius
R = gas constant (8.314 J.K -1 mol. -1 )
rco = radius of optical fibre core
rof = outer radius of optical fibre
Rf = Fresnel reflection coefficient
Rp = Fresnel reflection coefficient of p polarised light
Rs = Fresnel reflection coefficient of s polarised light
ρ = density
ra = anion radius
RAM = relative atomic mass
RAP = reactive atmosphere processing
rb-s = Bragg-Slater radius
rc = cation radius
rcov = covalent radius
re = equilibrium radius between two bonding atoms
rion = ionic radius
RMM = relative molecular mass
rvdw = Van der Waals radius
ρ = density
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