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On the other hand it is clearly seen that the combined Raman amplification almost perfectly compensates for the fiber losses along the full length of the amplifier. Figure 94 - The longitudinal evolution of the forward gain spectrum in the broadband gainflattened Raman amplifier 72
Lesson 10: Optimization of the gain flatness of broadband Raman amplifiers The flatness of the gain of inline fiber amplifiers is a matter of primary importance for WDM systems. This lesson will demonstrate how to optimize further the gain uniformity of the Raman amplifier described in “Lesson 9: Design of a broadband Raman amplifier using subsystems”. There are numerous parameters that influence considerably the performance of Raman amplifiers, but the most easily controlled one is probably the fiber length. Optimizing the length of the fiber First we set the mode of the parameter “Fiber Length” to “Sweep”. Next we adjust the number of iterations to 13 by using the sequence of steps described in Changing the number of sweep iterations. Next we define range of values for the fiber length from 10 to 40 km, as shown in Changing the values of sweep iterations. Figure 95 - “Sweeping” the length of the broadband gain-flattened Raman amplifier Next we have to add the “Results” “Maximal Forward Gain [dB]” and “Forward Gain Flatness [dB]” to the results display table as shown in the following figure: 73
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Tutorials OptiSys_Design Optical Co
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TABLE OF CONTENTS INTRODUCTION.....
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Introduction The most efficient way
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• Select CW Laser 1.0 and place i
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• The CW laser output to the Mach
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Visualizers and Data Monitors Figur
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For each category tab, there is a l
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Visualizers parameters In order to
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Optical Spectrum Analyzer Optical s
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You can also trace the to obtain th
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Lesson 2: Subsystems - Hierarchical
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Closing the subsystem Main layout S
Page 27 and 28: Subsystem properties: name and icon
Page 29 and 30: • In the Add parameter dialog box
Page 31 and 32: Global parameter frequency Global p
Page 33 and 34: Figure 39 -Adding components to the
Page 35 and 36: Running the simulation You can conn
Page 37 and 38: • Resize the layout by pressing C
Page 39 and 40: Parameter groups table gives you ac
Page 41 and 42: Figure 49 -Simulation results from
Page 43 and 44: Figure 52 -Loop control parameters
Page 45 and 46: • Select Electrical Amplifier 1.0
Page 47 and 48: Figure 57 -BER Analyzer graphs You
Page 49 and 50: The 3D graph is available in the gr
Page 51 and 52: Selecting the parameter to be itera
Page 53 and 54: Changing the values of sweep iterat
Page 55 and 56: Getting results using the Graph bui
Page 57 and 58: Browsing parameter sweep iterations
Page 59 and 60: Lesson 5: Design Versions - EDFA Ch
Page 61 and 62: Lesson 6: Optimizations - System ma
Page 63 and 64: Figure 77 -Getting results 57
Page 65 and 66: Figure 79 -Parameters for fiber len
Page 67 and 68: Input After SMF Output Figure 82 -S
Page 69 and 70: Figure 84 -The dispersion compensat
Page 71 and 72: Lesson 9: Design of a broadband Ram
Page 73 and 74: After creating the subsystem as sho
Page 75 and 76: Figure 91 - Raman Amplifier subsyst
Page 77: Figure 93 - Forward output spectrum
Page 81 and 82: It is immediately seen that optimal
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