def setUp(self):
self.sech = SechPulse(power=self.power,
T0_ps=0.0100,
center_wavelength_nm=1064,
NPTS=self.TEST_PTS,
time_window_ps=12.345,
frep_MHz=self.fr,
power_is_avg=True)
class SechPowerTest(unittest.TestCase):
TEST_PTS = 2**8
power = 3.2
fr = 2720.
EPP = power / (fr * 1e6)
def setUp(self):
self.sech = SechPulse(power=self.power,
T0_ps=0.0100,
center_wavelength_nm=1064,
NPTS=self.TEST_PTS,
time_window_ps=12.345,
frep_MHz=self.fr,
power_is_avg=True)
def tearDown(self):
pass
def test_wavelength_meters(self):
self.assertAlmostEqual(self.sech.calc_epp(), self.EPP)
def run_simulation(caller=None, prop=False):
bRun.label.set_text('Setting up...')
drawnow()
# Grab the parameters from the text boxes:
pump_pulse_length = float(bPulse.text)
centerwl = float(bWave.text) # in nm
pump_power = float(bPower.text) * 1e3
GDD = float(bGDD.text)
TOD = float(bTOD.text)
window = float(bWindow.text)
steps = int(bSteps.text)
npoints = int(eval(bPoints.text))
fiber_length = float(bLength.text) * 1e-3
gamma = float(bGamma.text)
beta2 = float(bBeta2.text)
beta3 = float(bBeta3.text)
beta4 = float(bBeta4.text)
fibWL = float(bFibWL.text)
isNotRaman = np.logical_not(bCheck.lines[0][0].get_visible())
isNotSteep = np.logical_not(bCheck.lines[1][0].get_visible())
# set up the pulse parameters
pulse = SechPulse(pump_power,
pump_pulse_length,
centerwl,
time_window=window,
GDD=GDD,
TOD=TOD,
NPTS=npoints,
frep_MHz=100,
power_is_avg=False)
fiber1 = fiber.FiberInstance()
fiber1.generate_fiber(fiber_length,
center_wl_nm=fibWL,
betas=(beta2, beta3, beta4),
gamma_W_m=gamma * 1e-3,
gvd_units='ps^n/km')
# fiber1.load_from_db(fiber_length, 'dudley')
print 'Parameters\n------------------'
print '--Pulse--'
print 'Duration (ps) %f' % pump_pulse_length
print 'Center wl (nm) %g' % centerwl
print 'Pump power (W) %g' % pump_power
print ' Energy (nJ) %f' % (pulse.calc_epp() * 1e9)
print 'GDD (ps^2) %f' % (GDD)
print 'TOD (ps^3) %f' % (TOD)
print '--Simulation--'
print 'Window (ps) %f' % window
print 'Steps %i' % steps
print 'Time points %i' % npoints
print '--Fiber--'
print 'Length (mm) %f' % (fiber_length * 1e3)
print 'Gamma (W-1km-1) %f' % (gamma)
print 'Beta2 (ps^2/km) %f' % (beta2)
print 'Beta3 (ps^3/km) %f' % (beta3)
print 'Beta4 (ps^4/km) %f' % (beta4)
print 'FiberWL (nm) %f' % (fibWL)
W = pulse.W_mks
F = W / (2 * np.pi)
T = pulse.T_ps
xW = W[W > 0]
D = fiber1.Beta2_to_D(pulse)
beta = fiber1.Beta2(pulse) * 1e3
# Plot the dispersion in the left plots
lineL1.set_data(F[W > 0][::10], D[W > 0][::10])
lineL2.set_data(F[W > 0][::10], beta[W > 0][::10])
# plot the pulse in the top plots
line1a.set_data(F[W > 0], dB(pulse.AW[W > 0]))
line2a.set_data(T, dB(pulse.AT))
laser_freq = 3e8 / (centerwl * 1e-9)
fiber_freq = 3e8 / (fibWL * 1e-9)
vline1a.set_xdata((laser_freq, laser_freq))
vline1b.set_xdata((fiber_freq, fiber_freq))
vline2a.set_xdata((laser_freq, laser_freq))
vline2b.set_xdata((fiber_freq, fiber_freq))
if prop == False:
bRun.label.set_text('Run simulation')
drawnow()
return # stop here unless we've actually pressed the "Run" button
######################## Propagation
t = time.time()
bRun.label.set_text('Running...')
drawnow()
# set up the propagation parameters
evol = SSFM.SSFM(local_error=0.001,
USE_SIMPLE_RAMAN=True,
disable_Raman=isNotRaman,
disable_self_steepening=isNotSteep)
# propagate the pulse!
y, AW, AT, pulse1 = evol.propagate(pulse_in=pulse,
fiber=fiber1,
n_steps=steps)
zW_in = np.transpose(AW)[:, (W > 0)]
zT_in = np.transpose(AT)
zW = dB(zW_in)
zT = dB(zT_in)
bRun.label.set_text('Drawing plots...')
drawnow()
line1b.set_data(F[F > 0], zW[-1])
line2b.set_data(T, zT[-1])
for ax in (ax3, ax4):
ax.clear()
extent = (np.min(F[F > 0]), np.max(F[F > 0]), np.min(y), np.max(y[:-1]))
ax3.imshow(zW,
extent=extent,
vmin=np.max(zW) - 60.0,
vmax=np.max(zW),
aspect='auto',
origin='lower')
ax3.set_xlabel('Frequency (Hz)')
ax3.set_ylabel('Distance (m)')
extent = (np.min(T), np.max(T), np.min(y), np.max(y[:-1]))
ax4.imshow(zT,
extent=extent,
vmin=np.max(zT) - 60.0,
vmax=np.max(zT),
aspect='auto',
origin='lower')
ax4.set_xlabel('Delay (ps)')
print 'Total time: %.2f sec' % (time.time() - t)
reset_plots()
bRun.label.set_text('Run simulation')
drawnow()
from pynlo.media.fibers import fiber
from pynlo.light.DerivedPulses import SechPulse
plt.close('all')
steps = 100
centerwl = 1550.0
gamma = 2e-3
fiber_length = 2500.0
P0 = 10.0
T0 = 0.1
nPoints = 2**13
pulse = SechPulse(P0, T0, centerwl, NPTS=nPoints)
fiber1 = fiber.FiberInstance()
fiber1.generate_fiber(fiber_length, centerwl, [0, 0], gamma, 0)
evol = FourWaveMixing.SSFM.SSFM(disable_Raman=True,
disable_self_steepening=True,
local_error=0.1,
suppress_iteration=True)
y = np.zeros(steps)
AW = np.complex64(np.zeros((pulse.NPTS, steps)))
AT = np.complex64(np.copy(AW))
y, AW, AT, pulse1, = evol.propagate(pulse_in=pulse,
fiber=fiber1,
from pynlo.light.DerivedPulses import SechPulse
plt.close('all')
steps = 200
centerwl = 850.0
gamma = 1e-3
fiber_length = 1600.0
T0 = 1
beta = [-1, 0]
P0 = (abs(beta[0] * 1e-3) / gamma / T0**2) * 16
init = SechPulse(power=P0,
T0_ps=T0,
center_wavelength_nm=centerwl,
time_window_ps=10.0,
NPTS=2**13)
fiber1 = fiber.FiberInstance()
fiber1.generate_fiber(fiber_length, centerwl, beta, gamma, 0, "ps^n/km")
evol = FourWaveMixing.SSFM.SSFM(disable_Raman=True,
disable_self_steepening=True,
local_error=0.001,
suppress_iteration=True)
y = np.zeros(steps)
AW = np.complex64(np.zeros((init.NPTS, steps)))
AT = np.complex64(np.copy(AW))
def setUp(self):
self.sech = SechPulse(power=2.727,
T0_ps=0.0100,
center_wavelength_nm=1064,
NPTS=self.TEST_PTS,
time_window_ps=12.345)
def run_simulation(caller=None):
pump_pulse_length = float(bPulse.text)
centerwl = float(bWave.text) # in nm
pump_power = float(bPower.text) * 1e3
fiber_length = float(bLength.text) * 1e-3
dz = float(bDz.text)
steps = int(bSteps.text)
npoints = int(eval(bPoints.text))
print 'Running simulation with'
print 'Pulse duration (fs): %f' % pump_pulse_length
print 'Center wavelength (nm): %f' % centerwl
print 'Pump power (W): %f' % pump_power
print 'Fiber length (m): %f' % fiber_length
print 'dz: %f' % dz
print 'Steps: %i' % steps
print 'Number of points: %i' % npoints
init = SechPulse(pump_power,
pump_pulse_length,
centerwl,
time_window=5.0,
GDD=0,
TOD=0.0,
NPTS=npoints,
frep_MHz=100,
power_is_avg=False)
fiber1 = fiber.FiberInstance()
fiber1.load_from_db(fiber_length, 'dudley')
evol = SSFM.SSFM(dz=dz, local_error=0.001, USE_SIMPLE_RAMAN=True)
y = np.zeros(steps)
AW = np.zeros((init.NPTS, steps))
AT = np.copy(AW)
y, AW, AT, pulse1 = evol.propagate(pulse_in=init,
fiber=fiber1,
n_steps=steps)
wl = init.wl_nm
loWL = 400
hiWL = 1400
iis = np.logical_and(wl > loWL, wl < hiWL)
iisT = np.logical_and(init.T_ps > -1, init.T_ps < 5)
xW = wl[iis]
xT = init.T_ps[iisT]
zW_in = np.transpose(AW)[:, iis]
zT_in = np.transpose(AT)[:, iisT]
zW = 10 * np.log10(np.abs(zW_in)**2)
zT = 10 * np.log10(np.abs(zT_in)**2)
mlIW = np.max(zW)
mlIT = np.max(zT)
D = fiber1.Beta2_to_D(init)
beta = fiber1.Beta2(init)
for ax in (ax1, ax2, ax3, ax4):
ax.clear()
axL1.plot(wl, D)
axL1.set_xlim(400, 1600)
axL1.set_ylim(-400, 300)
axL1.set_xlabel('Wavelength (nm)')
axL1.set_ylabel('D (ps/nm/km)')
axL2.plot(wl, beta * 1000)
axL2.set_xlim(400, 1600)
axL2.set_ylim(-350, 200)
axL2.set_xlabel('Wavelength (nm)')
axL2.set_ylabel(r'$\beta_2$ (ps$^2$/km)')
zW_grid = reinterpolate(xW, y[:-1], zW)
extent = (np.min(xW), np.max(xW), np.min(y), np.max(y[:-1]))
ax3.imshow(zW_grid,
extent=extent,
vmin=mlIW - 40.0,
vmax=mlIW,
aspect='auto',
origin='lower')
ax3.autoscale(tight=True)
ax3.set_xlim([loWL, hiWL])
ax3.set_xlabel('Wavelength (nm)')
ax3.set_ylabel('Distance (m)')
# plt.pcolormesh(xT, y, zT, vmin = mlIT - 40.0, vmax = mlIT)
zT_grid = reinterpolate(xT, y[:-1], zT)
extent = (np.min(xT), np.max(xT), np.min(y), np.max(y[:-1]))
ax4.imshow(zT_grid,
extent=extent,
vmin=mlIT - 40.0,
vmax=mlIT,
aspect='auto',
origin='lower')
ax4.autoscale(tight=True)
ax4.set_xlabel('Delay (ps)')
# ax4.set_ylabel('Distance (m)')
for label in ax4.get_yticklabels():
label.set_visible(False)
ax1.plot(xW, zW[0], color='b', label='Before')
ax1.plot(xW, zW[-1], color='r', label='After')
ax1.set_ylim(-40, 0)
ax2.plot(xT, zT[0], color='b', label='Before')
ax2.plot(xT, zT[-1], color='r', label='After')
ax2.set_ylim(-10, 40)
steps = 100
range1 = np.arange(steps)
centerwl = 835.0
fiber_length = 0.15
pump_power = 1.0e4 # Peak power
pump_pulse_length = 28.4e-3
npoints = 2**13
init = SechPulse(power=pump_power,
T0_ps=pump_pulse_length,
center_wavelength_nm=centerwl,
time_window_ps=10.0,
GDD=0,
TOD=0.0,
NPTS=npoints,
frep_MHz=100.0,
power_is_avg=False)
fiber1 = fiber.FiberInstance()
fiber1.load_from_db(fiber_length, 'dudley')
evol = SSFM.SSFM(dz=dz, local_error=0.001, USE_SIMPLE_RAMAN=True)
y = np.zeros(steps)
AW = np.zeros((init.NPTS, steps))
AT = np.copy(AW)
y, AW, AT, pulse1 = evol.propagate(pulse_in=init, fiber=fiber1, n_steps=steps)
dz = 1e-3
steps = 100
range1 = np.arange(steps)
centerwl = 835.0
fiber_length = 0.04
pump_power = 1.0e4
pump_pulse_length = 28.4e-3
npoints = 2**13
init = SechPulse(pump_power,
pump_pulse_length,
centerwl,
time_window=10.0,
GDD=0,
TOD=0.0,
NPTS=npoints,
frep_MHz=100,
power_is_avg=False)
fiber1 = fiber.FiberInstance()
fiber1.load_from_db(fiber_length, 'dudley')
evol = SSFM.SSFM(dz=1e-6, local_error=0.001, USE_SIMPLE_RAMAN=True)
y = np.zeros(steps)
AW = np.zeros((init.NPTS, steps))
AT = np.copy(AW)
y, AW, AT, pulse1 = evol.propagate(pulse_in=init, fiber=fiber1, n_steps=steps)
def run_simulation(caller=None, prop=False):
bRun.label.set_text('Setting up...')
drawnow()
# Grab the parameters from the text boxes:
pump_pulse_length = float(bPulse.text)
centerwl = float(bWave.text) # in nm
pump_power = float(bPower.text) * 1e3
fiber_length = float(bLength.text) * 1e-3
dz = float(bDz.text)
steps = int(bSteps.text)
npoints = int(eval(bPoints.text))
# set up the pulse parameters
pulse = SechPulse(pump_power,
pump_pulse_length,
centerwl,
time_window=10.0,
GDD=0,
TOD=0.0,
NPTS=npoints,
frep_MHz=100,
power_is_avg=False)
fiber1 = fiber.FiberInstance()
fiber1.load_from_db(fiber_length, 'dudley')
print 'Parameters\n------------------'
print '--Pulse--'
print 'Duration (ps) %f' % pump_pulse_length
print 'Center wl (nm) %g' % centerwl
print 'Pump power (W) %g' % pump_power
print ' Energy (nJ) %f' % (pulse.calc_epp() * 1e9)
print '--Fiber--'
print 'Length (mm) %f' % (fiber_length * 1e3)
print '--Simulation--'
print 'dz %f' % dz
print 'Steps %i' % steps
print 'Time points %i' % npoints
W = pulse.W_mks
T = pulse.T_ps
xW = W[W > 0]
D = fiber1.Beta2_to_D(pulse)
beta = fiber1.Beta2(pulse)
# Plot the dispersion in the left plots
lineL1.set_data(W[W > 0], D[W > 0])
lineL2.set_data(W[W > 0], beta[W > 0])
# plot the pulse in the top plots
line1a.set_data(W[W > 0], dB(pulse.AW[W > 0]))
line2a.set_data(T, dB(pulse.AT))
if prop == False:
bRun.label.set_text('Run simulation')
drawnow()
return # stop here unless we've actually pressed the "Run" button
######################## Propagation
t = time.time()
bRun.label.set_text('Running...')
drawnow()
# set up the propagation parameters
evol = SSFM.SSFM(dz=1e100, local_error=0.001, USE_SIMPLE_RAMAN=True)
# propagate the pulse!
y, AW, AT, pulse1 = evol.propagate(pulse_in=pulse,
fiber=fiber1,
n_steps=steps)
zW_in = np.transpose(AW)[:, (W > 0)]
zT_in = np.transpose(AT)
zW = dB(zW_in)
zT = dB(zT_in)
bRun.label.set_text('Drawing plots...')
drawnow()
line1b.set_data(xW, zW[-1])
line2b.set_data(T, zT[-1])
for ax in (ax3, ax4):
ax.clear()
extent = (np.min(xW), np.max(xW), np.min(y), np.max(y[:-1]))
ax3.imshow(zW,
extent=extent,
vmin=np.max(zW) - 40.0,
vmax=np.max(zW),
aspect='auto',
origin='lower')
ax3.set_xlabel('Wavelength (nm)')
ax3.set_ylabel('Distance (m)')
extent = (np.min(T), np.max(T), np.min(y), np.max(y[:-1]))
ax4.imshow(zT,
extent=extent,
vmin=np.max(zT) - 40.0,
vmax=np.max(zT),
aspect='auto',
origin='lower')
ax4.set_xlabel('Delay (ps)')
print 'Total time: %.2f sec' % (time.time() - t)
bRun.label.set_text('Run simulation')
drawnow()