Didactic panel optic fibers and optic instruments

Introduction to optical fiber systems:

• Optical fibers
  • Constructional structure
  • Light propagation in optical fibers
  • Modal dispersion
  • Chromatic dispersion
  • Attenuation
  • Bandwidth
• Sources and detectors
  • Sources: Led and Laser
  • Optical detectors: PIN and avalanche photodiodes
• Connections and headings
• • Connections
  • Headings Optical fiber communication systems:
• Digital transmission system
• Analog transmission system
• Video transmission system
• Transmission system between PCs
• Data Multiplexer transmission system
• Bidirectional transmission system with one fiber
• Bidirectional transmission system with two fibers
• Synchronous data transmission
• Asynchronous data transmission
• Used components
  • digital transmitter
  • analog transmitter
  • digital receiver
  • analog receiver
  • FM modulator
  • FM demodulator
  • audio modulator and Audio+Video combiner
  • Video/Audio separator and Audio demodulator
  • data multiplexer
  • data demultiplexer
  • WDM (Wavelength Division Multiplexer)
  • data coding / decoding: NRZ, Manchester, bi-phase Mark / Space
  • V24/RS232C interface
• Characteristics of components:
  • Digital and linear driving
  • characteristic curves of the optical source
  • bias current
  • emitted power adjustment
  • “Optical power/current” curve of the source
  • operating point of the LED
  • characteristics and driving of Laser diode
  • automatic control of the power emitted by Laser diode
  • waveform of the transmitted signal
  • detector responsivity
  • characteristics and biasing of avalanche photodiode
  • receiver saturation
  • modal dispersion
  • linearity of the connection
  • frequency response of the connection
  • dimensioning of the connection
  • power margin Measurements on optical fibers:
• Identification of components
• Structure of optical cables
• Numerical opening
• Attenuation
• Connectors Troubleshooting