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Commit 449bf621 authored by Daniel Brown's avatar Daniel Brown
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adding in code to generate ROM files for Finesse which have multple ROQ rules... 

adding in code to generate ROM files for Finesse which have multple ROQ rules for knm of different directions
parent 1ffdfb27
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pykat/optics/maps.py
View file @ 449bf621
......@@ -13,14 +13,29 @@ from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from pykat.optics.romhom import makeReducedBasis, makeEmpiricalInterpolant, makeWeights, makeWeightsNew
from pykat.optics.romhom import makeWeightsNew
from scipy.interpolate import interp2d, interp1d
from pykat.maths.zernike import *
import numpy as np
import math
import pickle
class MirrorROQWeights:
def __init__(self, rFront, rBack, tFront, tBack):
self.rFront = rFront
self.rBack = rBack
self.tFront = tFront
self.tBack = tBack
def writeToFile(self, romfilename):
with open(romfilename + ".rom", "w+") as f:
if self.rFront is not None: self.rFront.writeToFile(f=f)
if self.rBack is not None: self.rBack.writeToFile(f=f)
if self.tFront is not None: self.tFront.writeToFile(f=f)
if self.tBack is not None: self.tBack.writeToFile(f=f)
class surfacemap(object):
def __init__(self, name, maptype, size, center, step_size, scaling, data=None):
......@@ -111,7 +126,7 @@ class surfacemap(object):
def ROMWeights(self):
return self._rom_weights
def z_xy(self, x=None, y=None, wavelength=1064e-9, direction="11", nr1=1.0, nr2=1.0):
def z_xy(self, x=None, y=None, wavelength=1064e-9, direction="reflection_front", nr1=1.0, nr2=1.0):
"""
For this given map the field perturbation is computed. This data
is used in computing the coupling coefficient. It returns a grid
......@@ -119,13 +134,21 @@ class surfacemap(object):
of the field.
x, y : Points to interpolate at, 'None' for no interpolation.
wavelength: Wavelength of light in vacuum [m]
direction : 11 (reflection front)
12 (transmission front to back)
21 (transmission back to front)
22 (reflection back)
direction : Sets which distortion to return, as beams travelling
in different directions will see different distortions.
Options are:
"reflection_front"
"transmission_front" (front to back)
"transmission_back" (back to front)
"reflection_back"
nr1 : refractive index on front side
nr2 : refractive index on back side
"""
assert(nr1 >= 1)
......@@ -138,35 +161,35 @@ class surfacemap(object):
self.__interp = interp2d(self.x, self.y, self.data * self.scaling)
data = self.__interp(x, y)
if direction == "11" or direction == "22":
if direction == "reflection_front" or direction == "reflection_back":
if "phase" in self.type:
k = math.pi * nr1 * 2 / wavelength
k = math.pi * 2 / wavelength
if direction == "11":
return np.exp(-2j * k * data)
if direction == "reflection_front":
return np.exp(-2j * nr1 * k * data)
else:
return np.exp(2j * k * data[:, ::-1])
return np.exp(2j * nr2 * k * data[:,::-1])
elif "absorption" in self.type:
if direction == "11":
if direction == "reflection_front":
return np.sqrt(1.0 - data)
else:
return np.sqrt(1.0 - data[:, ::-1])
else:
raise BasePyKatException("Map type needs handling")
elif direction == "12" or direction == "21":
elif direction == "transmission_front" or direction == "transmission_back":
if "phase" in self.type:
k = math.pi * 2 / wavelength
if direction == "12":
return np.exp((nr1-nr2)*k * data)
if direction == "transmission_front":
return np.exp((nr1-nr2) * k * data)
else:
return np.exp((nr1-nr2)*k * data[:, ::-1])
return np.exp((nr2-nr1) * k * data[:, ::-1])
elif "absorption" in self.type:
if direction == "12":
if direction == "transmission_front":
return np.sqrt(1.0 - data)
else:
return np.sqrt(1.0 - data[:, ::-1])
......@@ -178,7 +201,8 @@ class surfacemap(object):
def generateROMWeights(self, EIxFilename, EIyFilename=None, verbose=False, interpolate=False, newtonCotesOrder=8):
def generateROMWeights(self, EIxFilename, EIyFilename=None, nr1=1.0, nr2=1.0, verbose=False, interpolate=False, newtonCotesOrder=8):
if interpolate == True:
# Use EI nodes to interpolate if we
with open(EIxFilename, 'rb') as f:
......@@ -200,9 +224,42 @@ class surfacemap(object):
self.interpolate(nx, ny)
self._rom_weights = makeWeightsNew(self, EIxFilename, EIyFilename, verbose=verbose, newtonCotesOrderMapWeight=newtonCotesOrder)
return self.ROMWeights
w_refl_front, w_refl_back, w_tran_front, w_tran_back = (None, None, None, None)
if "reflection" in self.type or "both" in self.type:
w_refl_front = makeWeightsNew(self, EIxFilename, EIyFilename,
verbose=verbose, newtonCotesOrderMapWeight=newtonCotesOrder,
direction="reflection_front")
w_refl_front.nr1 = nr1
w_refl_front.nr2 = nr2
w_refl_back = makeWeightsNew(self, EIxFilename, EIyFilename,
verbose=verbose, newtonCotesOrderMapWeight=newtonCotesOrder,
direction="reflection_back")
w_refl_back.nr1 = nr1
w_refl_back.nr2 = nr2
if "transmission" in self.type or "both" in self.type:
w_tran_front = makeWeightsNew(self, EIxFilename, EIyFilename,
verbose=verbose, newtonCotesOrderMapWeight=newtonCotesOrder,
direction="transmission_front")
w_refl_front.nr1 = nr1
w_refl_front.nr2 = nr2
w_tran_back = makeWeightsNew(self, EIxFilename, EIyFilename,
verbose=verbose, newtonCotesOrderMapWeight=newtonCotesOrder,
direction="transmission_back")
w_refl_back.nr1 = nr1
w_refl_back.nr2 = nr2
self._rom_weights = MirrorROQWeights(w_refl_front, w_refl_back, w_tran_front, w_tran_back)
return self._rom_weights
def interpolate(self, nx, ny, **kwargs):
"""
Interpolates the map for some new x and y values.
......@@ -307,6 +364,28 @@ class mergedmap:
self.__center = value
self.__interp = None
@property
def type(self):
hasR = False
hasT = False
_type = ""
for m in self.__maps:
if "reflection" in m.type: hasR = True
if "transmission" in m.type: hasT = True
if "both" in m.type:
hasR = True
hasT = True
if hasR and not hasT: _type += "reflection "
elif hasR and not hasT: _type += "transmission "
elif hasR and hasT: _type += "both "
return _type
@property
def step_size(self):
return self.__step_size
......@@ -345,7 +424,7 @@ class mergedmap:
def ROMWeights(self):
return self._rom_weights
def z_xy(self, wavelength=1064e-9, direction="reflection", nr1=1.0, nr2=1.0):
def z_xy(self, wavelength=1064e-9, direction="reflection_front", nr1=1.0, nr2=1.0):
z_xy = np.ones(self.size, dtype=np.complex128)
......@@ -357,7 +436,7 @@ class mergedmap:
else:
return z_xy * self.weighting
def generateROMWeights(self, EIxFilename, EIyFilename=None, verbose=False, interpolate=False, newtonCotesOrder=8):
def generateROMWeights(self, EIxFilename, EIyFilename=None, verbose=False, interpolate=False, newtonCotesOrder=8, nr1=1, nr2=1):
if interpolate == True:
# Use EI nodes to interpolate if we
with open(EIxFilename, 'rb') as f:
......@@ -379,9 +458,41 @@ class mergedmap:
self.interpolate(nx, ny)
self._rom_weights = makeWeightsNew(self, EIxFilename, EIyFilename, verbose=verbose, newtonCotesOrderMapWeight=newtonCotesOrder)
w_refl_front, w_refl_back, w_tran_front, w_tran_back = (None, None, None, None)
if "reflection" in self.type or "both" in self.type:
w_refl_front = makeWeightsNew(self, EIxFilename, EIyFilename,
verbose=verbose, newtonCotesOrderMapWeight=newtonCotesOrder,
direction="reflection_front")
w_refl_front.nr1 = nr1
w_refl_front.nr2 = nr2
w_refl_back = makeWeightsNew(self, EIxFilename, EIyFilename,
verbose=verbose, newtonCotesOrderMapWeight=newtonCotesOrder,
direction="reflection_back")
w_refl_back.nr1 = nr1
w_refl_back.nr2 = nr2
if "transmission" in self.type or "both" in self.type:
w_tran_front = makeWeightsNew(self, EIxFilename, EIyFilename,
verbose=verbose, newtonCotesOrderMapWeight=newtonCotesOrder,
direction="transmission_front")
w_refl_front.nr1 = nr1
w_refl_front.nr2 = nr2
w_tran_back = makeWeightsNew(self, EIxFilename, EIyFilename,
verbose=verbose, newtonCotesOrderMapWeight=newtonCotesOrder,
direction="transmission_back")
w_refl_back.nr1 = nr1
w_refl_back.nr2 = nr2
self._rom_weights = MirrorROQWeights(w_refl_front, w_refl_back, w_tran_front, w_tran_back)
return self.ROMWeights
return self._rom_weights
def interpolate(self, nx, ny, **kwargs):
"""
......
pykat/optics/romhom.py
View file @ 449bf621
......@@ -21,35 +21,52 @@ from pykat.maths import newton_weights
from scipy.integrate import newton_cotes
from multiprocessing import Process, Queue, Array, Value, Event
EmpiricalInterpolant = collections.namedtuple('EmpiricalInterpolant', 'B nodes node_indices limits x worst_error')
ReducedBasis = collections.namedtuple('ReducedBasis', 'RB limits x')
ROMLimits = collections.namedtuple('ROMLimits', 'zmin zmax w0min w0max R mapSamples max_order')
class ROMWeights:
def __init__(self, w_ij_Q1, w_ij_Q2, w_ij_Q3, w_ij_Q4, EIx, EIy):
def __init__(self, w_ij_Q1, w_ij_Q2, w_ij_Q3, w_ij_Q4, EIx, EIy, nr1=1, nr2=1, direction="reflection_front"):
self.w_ij_Q1 = w_ij_Q1
self.w_ij_Q2 = w_ij_Q2
self.w_ij_Q3 = w_ij_Q3
self.w_ij_Q4 = w_ij_Q4
self.nr1 = nr1
self.nr2 = nr2
self.direction = direction
self.EIx = EIx
self.EIy = EIy
def writeToFile(self, filename):
def writeToFile(self, filename=None, f=None):
"""
Writes this map's ROM weights to a file
that can be used with Finesse. The filename
is appended with '.rom' internally.
Specify either a filename to write the data too, the existing file is overwritten.
Or provide an open file object to be written too.
"""
f = open(filename + ".rom", 'w+')
if filename is None and f is None:
raise ValueError("'filename' or open file object 'f' should be specified")
if f is None:
f = open(filename + ".rom", 'w+')
f.write("direction=%s\n" % self.direction)
f.write("zmin=%16.16e\n" % self.EIx.limits.zmin)
f.write("zmax=%16.16e\n" % self.EIx.limits.zmax)
f.write("w0min=%16.16e\n" % self.EIx.limits.w0min)
f.write("w0max=%16.16e\n" % self.EIx.limits.w0max)
f.write("maxorder=%i\n" % self.EIx.limits.max_order)
f.write("R=%16.16e\n" % self.EIx.limits.R)
f.write("mapSamples=%i\n" % self.EIx.limits.mapSamples)
f.write("nr1=%16.16e\n" % self.nr1)
f.write("nr2=%16.16e\n" % self.nr2)
f.write("xnodes=%i\n" % len(self.EIx.nodes))
......@@ -80,47 +97,10 @@ class ROMWeights:
for v in self.w_ij_Q4.flatten():
f.write("%s\n" % repr(complex(v))[1:-1])
f.close()
class ROMWeightsFull:
def __init__(self, w_ij, EI, limits):
self.w_ij = w_ij
self.EI = EI
self.limits = limits
def writeToFile(self, filename):
"""
Writes this map's ROM weights to a file
that can be used with Finesse. The filename
is appended with '.rom' internally.
"""
f = open(filename + ".rom", 'w+')
f.write("zmin=%16.16e\n" % self.limits.zmin)
f.write("zmax=%16.16e\n" % self.limits.zmax)
f.write("w0min=%16.16e\n" % self.limits.w0min)
f.write("w0max=%16.16e\n" % self.limits.w0max)
f.write("maxorder=%i\n" % self.limits.max_order)
f.write("xnodes=%i\n" % len(self.EI["x"].nodes))
for v in self.EI["x"].nodes.flatten():
f.write("%s\n" % repr(float(v)))
f.write("ynodes=%i\n" % len(self.EI["y"].nodes))
for v in self.EI["y"].nodes.flatten():
f.write("%s\n" % repr(float(v)))
f.write(repr(self.w_ij.shape) + "\n")
for v in self.w_ij.flatten():
f.write("%s\n" % repr(complex(v))[1:-1])
f.close()
if filename is not None:
f.close()
def combs(a, r):
"""
......@@ -174,305 +154,11 @@ def u_star_u(re_q1, re_q2, w0_1, w0_2, n1, n2, x, x2=None):
def u_star_u_mm(z, w0, n1, n2, x):
return u(z, w0, n1, x) * u(z, w0, n2, x).conjugate()
################################################################################################
################################################################################################
################################################################################################
def makeReducedBasis(x, isModeMatched=True, tolerance = 1e-12, sigma = 1, greedyfile=None):
if greedyfile is not None:
greedypts = str(greedyfile)
else:
if isModeMatched:
greedypts = 'matched20.txt'
else:
greedypts = 'mismatched20.txt'
greedyfile = os.path.join(pykat.__path__[0],'optics','greedypoints',greedypts)
# Two potential different formats
try:
limits = np.loadtxt(greedyfile, usecols=(3,))[:5]
except IndexError:
limits = np.loadtxt(greedyfile, usecols=(1,))[:5]
romlimits = ROMLimits(w0min=limits[0], w0max=limits[1], zmin=limits[2], zmax=limits[3], max_order=limits[4])
w_min = limits[0]
w_max = limits[1]
re_q_min = limits[2]
re_q_max = limits[3]
max_order = int(limits[4])
indices = range(0, max_order+1)
nm_pairs = combs(indices, 2)
dx = x[1] - x[0]
params = np.loadtxt(greedyfile, skiprows=5)
TS_size = len(params) # training space of TS_size number of waveforms
#### allocate memory for training space ####
TS = np.zeros(TS_size*len(x), dtype = complex).reshape(TS_size, len(x)) # store training space in TS_size X len(x) array
IDx = 0 #TS index
for i in range(len(params)):
if isModeMatched:
q1 = beam_param(w0=float(params[i][0]), z=float(params[i][1]))
q2 = q1
n = int(params[i][2])
m = int(params[i][3])
else:
q1 = beam_param(w0=float(params[i][0]), z=float(params[i][2]))
q2 = beam_param(w0=float(params[i][1]), z=float(params[i][3]))
n = int(params[i][4])
m = int(params[i][5])
w0_1 = q1.w0
w0_2 = q2.w0
re_q1 = q1.z
re_q2 = q2.z
TS[IDx] = u_star_u(re_q1, re_q2, w0_1, w0_2, n, m, x)
# normalize
norm = np.sqrt(abs(np.vdot(dx * TS[IDx], TS[IDx])))
if norm != 0:
TS[IDx] /= norm
IDx += 1
else:
np.delete(TS, IDx)
#### Begin greedy: see Field et al. arXiv:1308.3565v2 ####
RB_matrix = [TS[0]] # seed greedy algorithm (arbitrary)
proj_coefficients = np.zeros(TS_size*TS_size, dtype = complex).reshape(TS_size, TS_size)
projections = np.zeros(TS_size*len(x), dtype = complex).reshape(TS_size, len(x))
iter = 0
while sigma > tolerance:
#for k in range(TS_size-1):
# go through training set and find worst projection error
projections = project_onto_basis(dx, RB_matrix, TS, projections, proj_coefficients, iter)
residual = TS - projections
projection_errors = [np.vdot(dx* residual[i], residual[i]) for i in range(len(residual))]
sigma = abs(max(projection_errors))
index = np.argmax(projection_errors)
#Gram-Schmidt to get the next basis and normalize
next_basis = TS[index] - projections[index]
next_basis /= np.sqrt(abs(np.vdot(dx* next_basis, next_basis)))
RB_matrix.append(next_basis)
iter += 1
return ReducedBasis(RB=np.array(RB_matrix), limits=romlimits, x=x)
def makeEmpiricalInterpolant(RB, sort=False):
e_x = RB.RB
x = RB.x
node_indices = []
x_nodes = []
V = np.zeros((len(e_x), len(e_x)), dtype = complex)
# seed EIM algorithm
node_indices.append( int(np.argmax( np.abs(e_x[0]) )))
x_nodes.append(x[node_indices])
for i in range(1, len(e_x)):
#build empirical interpolant for e_iter
for j in range(len(node_indices)):
for k in range(len(node_indices)):
V[k][j] = e_x[j][node_indices[k]]
invV = inv(V[0:len(node_indices), 0:len(node_indices)])
B = B_matrix(invV, e_x)
interpolant = emp_interp(B, e_x[i], node_indices)
res = interpolant - e_x[i]
index = int(np.argmax(np.abs(res)))
node_indices.append(index)
x_nodes.append( x[index] )
# make B matrix with all the indices
for j in range(len(node_indices)):
for k in range(len(node_indices)):
V[k][j] = e_x[j][node_indices[k]]
invV = inv(V[0:len(node_indices), 0:len(node_indices)])
B = np.array(B_matrix(invV, e_x))
node_indices = np.array(node_indices, dtype=np.int32)
nodes = np.array(x_nodes, dtype=np.float64)
if sort:
print (sort)
ix = np.argsort(nodes)
nodes = nodes[ix]
node_indices = node_indices[ix]
B = B[ix, :]
return EmpiricalInterpolant(B=B, nodes=nodes, node_indices=node_indices, limits=RB.limits, x=RB.x)
def makeWeights(smap, EI, verbose=True, useSymmetry=True, newtonCotesOrder=1):
if useSymmetry:
# get full A_xy
A_xy = smap.z_xy()
xm = smap.x[smap.x < 0]
xp = smap.x[smap.x > 0]
ym = smap.y[smap.y < 0]
yp = smap.y[smap.y > 0]
Q1xy = np.ix_(smap.x < 0, smap.y > 0)
Q2xy = np.ix_(smap.x > 0, smap.y > 0)
Q3xy = np.ix_(smap.x > 0, smap.y < 0)
Q4xy = np.ix_(smap.x < 0, smap.y < 0)
# get A_xy in the four quadrants of the x-y plane
A_xy_Q1 = A_xy[Q1xy]
A_xy_Q2 = A_xy[Q2xy]
A_xy_Q3 = A_xy[Q3xy]
A_xy_Q4 = A_xy[Q4xy]
# Not sure if there is a neater way to select the x=0,y=0 cross elements
A_xy_0 = np.hstack([A_xy[:,smap.x==0].flatten(), A_xy[smap.y==0,:].flatten()])
full_x = smap.x
full_y = smap.y
dx = full_x[1] - full_x[0]
dy = full_y[1] - full_y[0]
if verbose:
count = 4*len(EI["x"].B) * len(EI["y"].B)
p = ProgressBar(maxval=count, widgets=["Computing weights: ", Percentage(), Bar(), ETA()])
n = 0
# make integration weights
Bx = EI["x"].B
By = EI["y"].B[:,::-1]
w_ij_Q1 = np.zeros((len(Bx),len(By)), dtype = complex)
from pykat.optics.knm import newton_weights
wx = newton_weights(xm, newtonCotesOrder)
wy = newton_weights(ym, newtonCotesOrder)
for i in range(len(Bx)):
for j in range(len(By)):
B_ij_Q1 = np.outer(wx*Bx[i], wy*By[j])
w_ij_Q1[i][j] = dx*dy*np.einsum('ij,ij', B_ij_Q1, A_xy_Q1)
if verbose:
p.update(n)
n+=1
Bx = EI["x"].B[:,::-1]
By = EI["y"].B[:,::-1]
w_ij_Q2 = np.zeros((len(Bx),len(By)), dtype = complex)
for i in range(len(Bx)):
for j in range(len(By)):
B_ij_Q2 = np.outer(wx*Bx[i], wy*By[j])
w_ij_Q2[i][j] = dx*dy*np.einsum('ij,ij', B_ij_Q2, A_xy_Q2)
if verbose:
p.update(n)
n+=1
Bx = EI["x"].B[:,::-1]
By = EI["y"].B
w_ij_Q3 = np.zeros((len(Bx),len(By)), dtype = complex)
for i in range(len(Bx)):
for j in range(len(By)):
B_ij_Q3 = np.outer(wx*Bx[i], wy*By[j])
w_ij_Q3[i][j] = dx*dy*np.einsum('ij,ij', B_ij_Q3, A_xy_Q3)