# A SIMULATION TOOLS TO AID THE DESIGN OF by pptfiles

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```									A SIMULATION TOOLS TO AID THE
DESIGN OF DWDM NETWORK

NAME    : Tirza Hardita
NPM     : 11407052
Background
 DWDM is multiplexing technology in fiber optic used
occasionally for long distance data transmission.
 Needed simulation to find total losses that got in DWDM
transmission.
 Needed simulation to make easy calculation amplifier in
DWDM.
Scope of The Research
 The problems that be discussed is limited to design
simulation power budget to calculate the total losses and
number of amplifiers required by DWDM transmission using
GUI MATLAB program.
Research Objectives
 To facilitate calculate total losses in transmission lines.
 To facilitate calculate number of amplifiers needed in
transmission line.
 To prove the best parameter in DWDM transmission.
Methodology of The Research
 Study literature.
 Design simulation with program MATLAB based on GUI.
 Coding process to produce appropriate simulation with
purpose.
 Final step is testing simulation that has made.
Flowchart
Display of Simulation
• Simulation Power Budget   • Simulation Fiber with Amplifier
• Simulation Power Budget   • Specification Details
Minimum
Result and Analysis
• Simulation Power Budget

Total Losses = (distance *attenuation)
+connector loss +
splice loss
= (250 * 0.3) + 1.5 + 0.1
= 76.6 dB

PRx         = PTX - Total Losses +
Safety Margin
= 8 dBm - 76.6 dB + 3 dB
= -65.6 dBm

LMax        = FL + (PRx - Pmin / α)
= 250 + (-135.33)
= 114.67 km
• Simulation Fiber Optic With Amplifier
   PRx    = PTX + (Gain Amp – Gain ASE) -
Total Losses + Safety Margin
= 8 dBm + (25-3) dB - 76.6 dB+3dB   Type of Amplifier : EDFA   Length of Fiber : 250 Km
Gain Amplifier : 25 dB     Power Transmitter : 8 dBm
= -43.6 dBm                         Gain ASE : 3 dB            Power Minimum : -25 dBm
Safety Margin : 3 dB
Attenuation : 0.3 dB/Km
   ΔP     = PRx - Pmin                                                   Total Losses : 76.6 dB

= -65.6 - (-25)
= -40.6 dBm

   N      = ΔP / (GAmp-GASE)
= -40.6/22
= | -1.84 | = 2 amplifiers

   LMax   = FL + (PRx - Pmin / α)
= 250 + 11:33
= 261.33 km
• Simulation Power Budget Minimum
   Total Losses
TL1        = (jarak1 * 0.4) + conlos + splicelossA
= (300 * 0.4) + (2* 0.5) + (1 * 0.1)
= 121.1 dB
TL2        = (jarak1 * 0.4) + conlos + splicelossB
= (300 * 0.4) + (2 * 0.5) + (1 * 0.5)
= 121.5 dB
TL3        = (jarak1 * 0.3) + conlos + splicelossA
= (300 * 0.3) + (2 * 0.5) + (1 * 0.1)
= 91.1 dB
TL4        = (jarak1 * 0.3) + conlos + splicelossB
= (300 * 0.3) + (2 * 0.5) + (1 * 0.5)
= 91.5 dB

PRa        = Ptrans - (TLA +30) + (sm +30)
= 8 dBm - (91.1 + 30) dBm + 33 dBm
= -80.1 DBm

   Maximum Length
LM1        = flA + (PRa-30) - (PIN-30) / attA
= 300 + (-80.1-30) - (-25-30) / 0.3
= 116.33 km
LM2        = flA + (PRa-30) - (APD-30) / attA
= 300 + (-80.1-30) - (-34-30) / 0.3
= 146.33 km
• Simulation Specification Details
CONCLUSIONS
 This program simulation can be used to facilitate calculating
the value of power budget that will be generated.
 Results of the simulation are same to the mathematics
calculation.
 DWDM better use wavelength 1550nm and amplifier EDFA
because has a small attenuation and gain of EDFA bigger than
gain Raman amplifier.
 According to existing theory, transmission long haul APD
better than PIN because has a great sensitivities and can
accommodate the wider bandwidth.
Suggestion

 To generate a simulation that much more complete and
accurate to the real condition, it would require a more
comprehensive type of parameters and has a predetermined
value by the IEEE or ITU-T.

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