New example 6 and 7

examples/example_crossphasemodulation_6.py

@@ -48,7 +48,7 @@ E_Tx = copy.deepcopy(E)
 plt.figure(1)
 plt.subplot(2, 1, 1)
 plt.plot((gp.freqax-gp.f0)*1e-9, np.log10(abs(fftshift(fft(E[0]['E'][0]   )**2))), 'r', label='X-Pol')
-plt.plot((gp.freqax-gp.f0)*1e-9, np.log10(abs(fftshift(fft(E[0]['E'][1]   )**2))), 'g:', label='Y-Pol')
+plt.plot((gp.freqax-gp.f0)*1e-9, np.log10(abs(fftshift(fft(E[0]['E'][1]   )**2))), 'g', label='Y-Pol')
 plt.title("Input spectrum", loc='left')
 plt.ylabel('Spec. density');
 plt.grid(True)
@@ -60,7 +60,7 @@ E = SSMF(E = E)
 # Plot Spectrum Output signals
 plt.subplot(2, 1, 2)
 plt.plot((gp.freqax-gp.f0)*1e-9, np.log10(abs(fftshift(fft(E[0]['E'][0]   )**2))), 'r', label='X-Pol')
-plt.plot((gp.freqax-gp.f0)*1e-9, np.log10(abs(fftshift(fft(E[0]['E'][1]   )**2))), 'g:', label='Y-Pol')
+plt.plot((gp.freqax-gp.f0)*1e-9, np.log10(abs(fftshift(fft(E[0]['E'][1]   )**2))), 'g', label='Y-Pol')
 plt.title("Output spectrum", loc='left')
 plt.ylabel('Spec. density'); plt.xlabel('Frequency deviation [GHz]');
 plt.grid(True)
@@ -90,17 +90,17 @@ plt.figure(2)
 
 plt.subplot(2, 1, 1)
 plt.ylabel('$|E|^2$'); plt.xlabel('Transmission distance [m]');
-plt.plot(gp.timeax*1.0e12, np.abs(E_f1[0]['E'][0])**2, 'r', label='$E_x Pulse$')
-plt.plot(gp.timeax*1.0e12, np.abs(E_f1[0]['E'][1])**2, 'g', label='$E_y Pulse$')
-plt.plot(gp.timeax*1.0e12, np.abs(E_f0[0]['E'][0])**2, 'r:', label='$E_x cw@1550nm$')
-plt.plot(gp.timeax*1.0e12, np.abs(E_f0[0]['E'][1])**2, 'g:', label='$E_y cw@1550nm$')
-
+plt.plot(gp.timeax*1.0e12, np.abs(E_f1[0]['E'][0])**2, 'r', label='$Pulse: E_x $')
+plt.plot(gp.timeax*1.0e12, np.abs(E_f1[0]['E'][1])**2, 'g', label='$Pulse: E_y Pulse$')
+plt.plot(gp.timeax*1.0e12, np.abs(E_f0[0]['E'][0])**2, 'r:', label='$cw@1550nm: E_x $')
+plt.plot(gp.timeax*1.0e12, np.abs(E_f0[0]['E'][1])**2, 'g:', label='$cw@1550nm: E_y$')
+legend = plt.legend(loc='upper right')
 
 plt.grid(True)
 plt.subplot(2, 1, 2)
-plt.plot(gp.timeax*1.0e12, np.angle(E[0]['E'][0]), 'r', label='$E_x$')
-plt.plot(gp.timeax*1.0e12, np.angle(E[0]['E'][1]), 'g', label='$E_y$')
+plt.plot(gp.timeax*1.0e12, np.angle(E[0]['E'][0]), 'r', label='$cw@1550nm: E_x$')
+plt.plot(gp.timeax*1.0e12, np.angle(E[0]['E'][1]), 'g', label='$cw@1550nm: E_y$')
 plt.ylabel('$phase(E_x)$');
 plt.grid(True)
-
+legend = plt.legend(loc='upper right')
 plt.show()
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examples/example_dispersion_1.py

@@ -30,9 +30,9 @@ E_Tx = sig_1550(esig = esig)
 
 # Define your parameters here
 T_0 = 25.0e-12
-z = SSMF.l
-D = SSMF.D
-beta_2, beta_3 = DS2beta(D, 0, gp.lambda0)
+z = 100.0e3
+D = 17.0
+beta_2, beta_3 = DS2beta(17.0, 0, gp.lambda0)
 
 
 # Create a single pulse with gaussian shape (not power!)
@@ -45,7 +45,7 @@ E = SSMF(E = E, D = D, l = z)
 # Plot Input and Output signal 
 plt.figure(1)
 plt.plot(gp.timeax*1.0e12, np.abs(E_Tx[0]['E'][0]), 'r', label='$E(0, t)$')
-plt.plot(gp.timeax*1.0e12, np.abs(E[0]['E'][0]), 'g', label='$E(z='+ str(SSMF.l/1e3)+' $km$, t)$')
+plt.plot(gp.timeax*1.0e12, np.abs(E[0]['E'][0]), 'g', label='$E(z=100$km$, t)$')
 
 
 # Get FWHM of the input signal E_Tx
@@ -64,7 +64,6 @@ plt.annotate(s='', xy=(r1,np.max(np.abs(E[0]['E'][0]))/2), xytext=(r2,np.max(np.
 plt.text(r1+(r2-r1)/2.0, 0.01 + np.max(np.abs(E[0]['E'][0]))/2, '$T_{FWHM,1}$ = ' + str(np.round(r2-r1,2)) + ' ps', fontsize=12, horizontalalignment='center')
 T_FWHM_1 = (r2-r1) * 1e-12
 plt.ylabel('$|E|$ a.u.'); plt.xlabel('Time $t$ [ps]'); legend = plt.legend(loc='upper right')
-plt.show()
 
 L_D = (T_0_plot)**2  / np.abs(beta_2)
 # Print the results

examples/example_dispersion_2.py

@@ -54,8 +54,8 @@ eye(E = E[0]['E'], polarisation = 'x', style="g")
 
 red_patch = mpatches.Patch(color='red', label='Input signal')
 green_patch = mpatches.Patch(color='green', label='Output signal')
-plt.legend(handles=[red_patch, green_patch], loc=1)
-print 'Calculated output FWHM-pulse width : T_FWHM,1 = ' , T_FWHM * np.sqrt(1 + (z/L_D)**2)*1e12, ' ps'
+plt.legend(handles=[red_patch, green_patch], loc=1); plt.show()
 
+print 'Calculated output FWHM-pulse width : T_FWHM,1 = ' , T_FWHM * np.sqrt(1 + (z/L_D)**2)*1e12, ' ps'
 T_FWHM_norm_0 = T_FWHM*1e12 / 100.0
 print (  'Calculated max reach : ' , 100e-12**2 *(1/1.665095)**2 * 2.0*np.pi * 299792458 *  T_FWHM_norm_0*np.sqrt(  T_FWHM_norm_max**2 - T_FWHM_norm_0**2) / (16.8e-6 * 1550e-9**2 )  *1e-3 )
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examples/example_dispersion_3.py

@@ -60,7 +60,7 @@ E = copy.deepcopy(E_Tx)
 
 # Fiber trannsmission
 E = SSMF(E = E,l = 100e3,  D = 16.8, S = 0.058) 
-E =  DCF(E = E,l = 16.8e3, D = -100, S = -0.058/16.8 * 100) # For full dispersion compenstion set S = -0.058/16.8 * 100
+E =  DCF(E = E,l = 16.8e3, D = -100, S = -0.058/16.8 * 100 # For full dispersion compenstion set S = -0.058/16.8 * 100
 
 
 # Filter out the channels
@@ -80,4 +80,4 @@ plt.subplot(3, 1, 2)
 eye(E = E_1550[0]['E'], polarisation = 'x', style="r")
 plt.subplot(3, 1, 3)
 eye(E = E_1554[0]['E'], polarisation = 'x', style="r")
-
+plt.show()
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examples/example_fourwavemixing_4.py

@@ -56,7 +56,7 @@ plt.plot((gp.freqax-gp.f0)*1e-9, np.log10(abs(fftshift(fft(E[0]['E'][1]   )**2))
 plt.title("Input spectrum", loc='left')
 plt.ylabel('Spec. density');
 plt.grid(True)
-
+plt.show()
 # Fiber transmission
 c1 = 0
 for z in np.arange(0,L,l):

examples/example_polarisationmodedispersion_7.py

+##!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+#Import functions and libraries
+import sys
+sys.path.append('../')
+from pypho_setup import pypho_setup
+from pypho_bits import pypho_bits
+from pypho_signalsrc import pypho_signalsrc
+from pypho_lasmod import pypho_lasmod
+from pypho_fiber import pypho_fiber
+from pypho_fiber_birefringence import pypho_fiber_birefringence
+from pypho_cwlaser import pypho_cwlaser
+from pypho_optfi import pypho_optfi
+from pypho_functions import *
+import numpy as np
+import copy
+import matplotlib.patches as mpatches
+import matplotlib.pyplot as plt
+
+# Define network elements
+gp       = pypho_setup(nos = 16, sps = 1*128, symbolrate = 10e9)
+bitsrc   = pypho_bits(glova = gp, nob = gp.nos, pattern = 'singlepulse') # Set pattern = "singlepulse"
+esigsrc  = pypho_signalsrc(glova = gp, pulseshape = 'gauss_rz' , fwhm = 0.33)
+sig      = pypho_lasmod(glova = gp, power = 0, Df = 0, teta = 1*np.pi/8.0)
+SSMF     = pypho_fiber(glova = gp, l = 80e3,  D = 0.0,   S = 0.0, alpha = 1.0e-12, gamma = 1.4, phi_max = 0.9)
+
+# Simulation
+
+# Define wavelength channels
+bits    = bitsrc()
+esig    = esigsrc(bitsequence = bits)
+E       = sig(esig = esig)  
+
+E_Tx = copy.deepcopy(E)
+
+# Create birefarray
+fibres = []
+fibres.append(pypho_fiber_birefringence(0, 0, 0.001))
+#fibres.append(pypho_fiber_birefringence(40e3, np.pi/2, 0.001))
+
+# Fiber transmission
+E = SSMF(E = E, birefarray = fibres)    
+
+# Plot power of both pol axis as function of transmission distance
+plt.figure(2)
+plt.ylabel('$|E|^2$'); plt.xlabel('Time [ps]');
+plt.plot(gp.timeax*1.0e12, np.abs(E_Tx[0]['E'][0])**2, 'r', alpha=0.4, label='$E_x$ input')
+plt.plot(gp.timeax*1.0e12, np.abs(E_Tx[0]['E'][1])**2, 'g', alpha=0.4, label='$E_y$ input')
+plt.plot(gp.timeax*1.0e12, np.abs(E[0]['E'][0])**2, 'r', label='$E_x$ output')
+plt.plot(gp.timeax*1.0e12, np.abs(E[0]['E'][1])**2, 'g', label='$E_y$ output')
+plt.grid(True); legend = plt.legend(loc='upper right'); plt.show()
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