Long-Haul-DWDM-Fiber-Network-Design-Using-Cisco-Optical-Network-Planner

Designed a scalable, high-capacity Dense Wavelength Division Multiplexing (DWDM) transport system for a simulated 1,000 km fiber route using Cisco's Optical Network Planner. The project focused on optimizing spectral efficiency, minimizing signal degradation, and ensuring resiliency and reach across the optical backbone.

🎯 Project Objectives: Long-Haul DWDM Backbone Design

• 🚀 Design a scalable DWDM backbone capable of supporting both 100 Gbps and 400 Gbps wavelength services across long-haul fiber routes.

• 📊 Evaluate optical performance metrics, including:

  • Optical Power Budget
  • OSNR (Optical Signal-to-Noise Ratio)
  • Chromatic Dispersion

• 🔧 Simulate amplifier placement and span loss compensation for each fiber segment to ensure signal integrity across the entire route.

• 📦 Translate the design into vendor-aligned configurations suitable for real-world deployment (e.g., TL1 commands, ROADM planning, and interface parameters).

🛠️ Tools & Technologies

• 🧠 Cisco Optical Network Planner (ONP)
  Used for professional-grade DWDM topology design and simulation.

• 🐍 GNPy (Gaussian Noise Python)
  Open-source optical planner used to cross-verify span loss, OSNR, and reach.

• 📦 DWDM Line Cards & ROADMs (Simulated)
  Emulated hardware configurations for realistic network modeling.

• 📊 Excel + Python
  Utilized for optical power budgeting, loss calculations, and data validation.

• 🌐 ITU Grid Wavelength Planning
  Applied ITU-T G.694.1 standards to allocate and manage channel spacing.

• 📄 TL1 Command Templates
  Created for provisioning and simulating circuit turn-up in a vendor-aligned format.

  🐍 🧪 GNPy (Gaussian Noise Python)

Successfully installed and launched GNPy using Docker:

$ docker run -it --rm --volume $(pwd):/shared telecominfraproject/oopt-gnpy
root@bea050f186f7:/shared/example-data#

🧪 What You Can Simulate with GNPy

GNPy empowers you to model and validate complex optical transport networks with features like:

• 🔀 Optical Channel Planning
  Design wavelength routes across a DWDM network using standard ITU grid spacing.

• 📉 Span Loss Calculation
  Accurately compute fiber attenuation over long-haul spans with customizable parameters.

• 📊 OSNR Degradation Analysis
  Simulate the signal-to-noise ratio across spans to validate quality thresholds for 100G/400G.

• ⚡ Amplifier Placement Optimization
  Determine the optimal positioning and gain settings of EDFAs or Raman amplifiers.