def writeSim(n, lbcs, pointSets):
sim = mx.Simulation(simName, dim)
grid = mx.Grid(3 * [n], origin, [lx, ly, lz])
output = mx.Output()
for name, points in pointSets.iteritems():
output.fieldValues(name, points)
bcs = mx.BoundaryConditions()
bcs.setUpperBCs(["pec", "pec", "pec"])
bcs.setLowerBCs(lbcs)
eigParams = globEigParams
eigParams["nev"] = len(dm.octModes(lbcs, nev)[0])
sim.setGrid(grid)
sim.addDielectric(diel)
sim.addPEC(pecSph)
sim.setBCs(bcs)
sim.setOutput(output)
sim.setEigensolverParameters(eigParams)
sim.write()
def main():
# create the cmd line parser
parser = argparse.ArgumentParser()
# Just examples for now
parser.add_argument("-m",
"--maximum-time",
help="Maximum time (seconds) the job will run",
action="store",
dest="maxtime",
type=int)
parser.add_argument("-t",
"--testing",
help="test signal catching",
action="store_true")
(args, unkargs) = parser.parse_known_args()
# Basic parameters from Zhu, Brown,
# "Full-vectorial finite-difference analysis of microstructured optical fibers"
# The calculation window is chosen to be the first quadrant of the fiber
# cross section with a computation window size of 6um by 6 um.
fiberRadius = 3.e-6
refractionIndex = 1.45
n_eff = 1.438604 # Computed value
wavelen = 1.5e-6
relPermittivity = refractionIndex**2
vacWavelen = wavelen * refractionIndex
freq = speed_of_light / (wavelen / n_eff)
print("Vacuum wavelength = %g, frequency = %g" % (vacWavelen, freq))
# Grid parameters
resolution = 0.05 # Number of cells per wavelength
endyz = 6.e-6
bgnyz = -endyz
lenyz = endyz - bgnyz
dl = resolution * fiberRadius
yzcells_half = int(endyz / dl)
yzcells = 2 * yzcells_half
xcells = 2
lenx = xcells * dl
print("%d cells in the x direction, %d cells in the y and z directions." %
(xcells, yzcells))
# set the grid
dim = 3
grid = mx.Grid([xcells, yzcells, yzcells], [0., bgnyz, bgnyz],
[lenx, lenyz, lenyz])
# boundary conditions
bcs = mx.BoundaryConditions()
bcs.setLowerBCs(['periodic', 'pec', 'pec'])
bcs.setUpperBCs(['periodic', 'pec', 'pec'])
kay = n_eff * 2. * math.pi / vacWavelen
phaseShift = kay * lenx
bcs.setPhaseShifts([phaseShift, 0., 0.])
print("phase shift = %g." % (phaseShift))
cylLen = lenx + 4. * dl
cylStart = -2. * dl
cyl = mx.Cylinder(fiberRadius, [1., 0., 0.], [cylStart, 0., 0.])
# mu = mx.Mu(sph, muDiag=[9.4, 9.4, 11.6], losstan=0.e-1)
diel = mx.Dielectric(
cyl, epsDiag=[relPermittivity, relPermittivity, relPermittivity])
# setup simulation
baseName = "cylinder" # Should come from args
sim = mx.Simulation(baseName, dim)
sim.setGrid(grid)
sim.addDielectric(diel)
sim.setBCs(bcs)
# create new eigensolver object
eig = mx.Eigensolver()
eig.setParams({"nev": 10, "basis": 30})
prec = mx.AMG()
lin = mx.LinearSolver(prec=prec)
# lin.setParams({"sweeps": 2, "type": "gmres",
# "prec type": "amg",
# "smoother": "Chebyshev",
# "levels": 10, "basis": 20})
eig.setLinearSolver(lin)
sim.setSolver(eig)
# Write input file and run simulation
sim.write()
mxwl = "../../builds/maxwell/ser/src/maxwell"
exline = mxwl + " --infile=" + baseName + ".mx"
print(exline)
if os.path.isfile(mxwl):
os.system(exline)
##########################
# Boundary conditions
##########################
bcs = mx.BoundaryConditions() # defaults to periodic in all directions
#bcs.setUpperBCs(["pec","pec","pec"])
#bcs.setLowerBCs(["pec","pec","pec"])
bcs.setPhaseShifts([0, 0, phAdv])
#bcs.setPhaseShifts([0, 0, 0])
##########################
##########################
# Simulation setup
##########################
sim = mx.Simulation(baseName, dim)
sim.setGrid(grid)
sim.addPEC(cav)
sim.setBCs(bcs)
sim.setEigensolverParameters({"nev": 10, "basis": 20})
sim.setLinearSolverParameters({
"sweeps": 2,
"type": "gmres",
"prec type": "amg",
"levels": 2,
"basis": 20,
"smoother": "Chebyshev"
})
sim.write()
o = -0.5
# the object
sph = mx.Sphere(0.37, [0.0, 0.0, 0.0])
epsDiag = [10.225, 10.225, 9.95]
epsOffDiag = [0.67360967926537398, -0.67360967926537398, -0.825]
diel = mx.Dielectric(sph, epsDiag=epsDiag, epsOffDiag=epsOffDiag)
# the solver
solver = mx.Eigensolver()
#resolutions = range(8, 32)
resolutions = [36]
print resolutions
for r in resolutions:
name = baseName + "-%.3d" % r
grid = mx.Grid(dim * [r], dim * [o], dim * [l])
sim = mx.Simulation(name, dim)
sim.setGrid(grid)
sim.addDielectric(diel)
#sim.setLinearSolverParameters({"sweeps": 5, "type": "gmg-gmres", "levels": 3, "basis": 20})
sim.setSolver(solver)
sim.write()
#os.system("mpirun -machinefile ./nodes -np 4 src/maxwell --infile=%s" % (name + ".mx"))
#os.system("src/maxwell --infile=%s" % (name + ".mx"))
#os.system("cp mxEigenfrequenciesReal.h5 eigfreqs-fit-phc-sapph/eigfreqs%.3d.h5" % r)
pad = 2
delta = cellLen / float(cellRes)
nz = numCells * cellRes + 2 * pad
lz = float(nz) * delta
oz = -0.5 * lz
ny = nx = 2 * (int(math.ceil(cavRad / delta)) + pad)
ly = lx = float(nx) * delta
oy = ox = -0.5 * lx
grid = mx.Grid([nx, ny, nz], [ox, oy, oz], [lx, ly, lz])
# simulation setup
sim = mx.Simulation("crabcav.mx", 3)
sim.setGrid(grid)
sim.addPEC(cav)
sim.setLinearSolverParameters({"sweeps": 3})
sim.setEigensolverParameters({"nev": 15})
sim.write()
sys.exit()
resolutions = range(36, 40)
print resolutions
for r in resolutions:
name = baseName + "-%.3d" % r
grid = mx.Grid(dim * [r], dim * [o], dim * [l])