Certified Fibre Characterisation Engineer (CFCE) – Butler Technologies
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A unique training course from Optical Technology Training, delivered by licensed partners around the world. Available in Ireland via Butler Technologies.

Overview

As data rates increase and systems become more complex, there are more factors that can impair system performance. This advanced course helps you master the fibre optic tests required to prove that modern fibre infrastructures are of high quality and support direct detection and coherent systems for high data rate applications from 10 Gb/s to 400 Gb/s and beyond. You will also be able to assess support for Raman amplification as well as extended wavelength operation for DWDM and CWDM systems. Typically it is necessary to characterise fibres when dark fibre contracts are signed, to prove that the fibres will operate satisfactorily for the duration of the contract period.

You’ll learn to apply the full power of multi-purpose test platforms and their measurement capabilities including insertion and return loss, bi-directional OTDR testing, chromatic dispersion, Polarisation Mode Dispersion (PMD) and spectral attenuation. You’ll also learn how to check the validity of measurements, avoid costly mistakes, and process results using test report software for full system documentation.

Features

Hands-on experience using specially constructed fibre test systems
Comprehensive course manual
Supporting online resources
Pass the assessment to gain Certified Fibre Characterisation Engineer (CFCE) status

Key Outcomes

  • Explain the significance of fibre specifications and performance grades, including all G.65n.x fibre types
  • Identify infrastructure characteristics that can impair system performance
  • Design and plan test programmes to meet customer and operational requirements
  • Interpret test specifications
  • Inspect connector end faces and assess against IEC 61300.3.35 criteria
  • Perform accurate and reliable insertion loss and return loss measurements
  • Describe the purpose of OTDR testing and analyse traces, event tables and link maps
  • Measure chromatic dispersion accurately and describe PMD and its measurement
  • Perform full fibre characterisation on installed fibre systems
  • Interpret results to report on infrastructure quality and map against application support criteria

Prerequisites: This is an advanced course and assumes previous experience of ILM and OTDR testing.

Course Syllabus

Becoming a CFCE
  • What are optical networks?
  • What is fibre characterisation?
  • Why & when is it necessary?
  • How is it done?
  • Standards
  • Characteristics of Light
  • Wavelengths & frequencies used in fibre optics
  • Singlemode fibre as a waveguide
  • Speed of light & dispersion
Light in Optical Fibres & Optical Fibres
  • How fibres work; singlemode fibre
  • Launch conditions; attenuation; dispersion
  • Bend loss performance
  • Optical fibres for telecoms
  • Fibre standards
Preparation & Inspect + Clean Connectors
  • Specification of parameters
  • Characterisation systems & resources checklists
  • Management of test results
  • Reference & measurement procedures
  • Why do we inspect & clean?
  • Inspection standards & equipment
  • Cleaning equipment; connector care
ILM, Spectral Attenuation & Return Loss
  • Continuity checking; power & loss budgets
  • Insertion loss measurements
  • Spectral attenuation; live fibre identifiers
  • Return loss definitions
  • Performance requirements
  • How return loss is measured
OTDR Testing
  • What is OTDR testing? Capabilities & limitations
  • Distance, fibre loss, bending losses, splice/connector loss
  • Link return loss (ORL)
  • Dead zone & resolution
  • Test configurations (drum, pretermination, connectorised)
  • Bidirectional testing
  • Using the OTDR: stepbystep, manipulating traces, parameters
  • Common issues: launch, bare fibre interfacing, ghosts, mismatches
  • Trace analysis: event tables, link maps, multiwavelength & multifibre analysis, bidirectional analysis & comparison
  • OTDR software: viewers, automatic event detection, comparing traces
Dispersion (Chromatic & PMD)
  • When do we need dispersion measurements?
  • Chromatic dispersion: what & why
  • CD characteristics of common fibre types
  • Measurement methods: standards; group delay; timeofflight; phase shift
  • PMD & system performance (incl. 2nd order PMD; dynamics)
  • Measurement techniques: interferometric, polarimetric, fixed analyser, wavelength scanning
  • Interpreting PMD test results
  • Choosing techniques for different contexts

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