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Bilal Mohammed Ziyadah
INTRODUCTION 
WHY OPTICAL SENSORS ? 
PRINCIPLE OF OPTICAL SENSORS 
CLASSIFICATION AND COMPARISON 
SOME INTERESTING APPLICATIONS 
WHERE DO WE GO FROM HERE ?
• NEW REVOLUTION OF OPTICAL FIBER 
SENSORS 
• IT IS A “SPIN-OFF” FROM OTHER 
OPTICAL TECHNOLOGIES 
• SEEING THE POTENTIAL IN SENSING 
APPLICATIONS – DEVELOPED AS ITS 
OWN FIELD
• ELECTROMAGNETIC IMMUNITY 
• ELECTRICAL ISOLATION 
• COMPACT AND LIGHT 
• BOTH POINT AND DISTRIBUTED 
CONFIGURATION 
• WIDE DYNAMIC RANGE 
• AMENABLE TO MULTIPLEXING
•LIGHT BEAM CHANGES BY THE 
PHENOMENA THAT IS BEING MEASURED 
•LIGHT MAY CHANGE IN ITS FIVE OPTICAL 
PROPERTIES i.e INTENSITY, PHASE, 
POLARIZATION,WAVELENGTH AND 
SPECTRAL DISTRIBUTION
EP(t)cos[ωt+θ(t)] 
• INTENSITY BASED SENSORS – EP (t) 
• FREQUENCY VARYING SENSORS - ωP(t) 
• PHASE MODULATING SENSING- θ(t) 
• POLARIZATION MODULATING FIBER SENSING
• EXTRINSIC SENSORS 
WHERE THE LIGHT LEAVES THE FEED OR 
TRANSMITTING FIBER TO BE CHANGED 
BEFORE 
IT CONTINUES TO THE DETECTOR BY MEANS 
OF THE RETURN OR RECEIVING FIBER
• INTRINSIC SENSORS 
INTRINSIC SENSORS ARE DIFFERENT IN THAT THE 
LIGHT BEAM DOES NOT LEAVE THE OPTICAL FIBER 
BUT IS CHANGED WHILST STILL CONTAINED WITHIN IT.
EXTRINSIC INTRINSIC 
APPLICATIONS- ROTATION, 
ACCELERATION, STRAIN, 
ACOUSTIC PRESSURE AND 
VIBRATION. 
MORE SENSITIVE 
TOUGHER TO MULTIPLEX 
REDUCES CONNECTION 
PROBLEMS 
MORE ELABORATE SIGNAL 
DEMODULATION 
MORE EXPENSIVE 
APPLICATIONS-TEMPERATURE, 
PRESSURE,LIQUID LEVEL AND 
FLOW. 
LESS SENSITIVE 
EASILY MULTIPLEXED 
 INGRESS/ EGRESS 
CONNECTION PROBLEMS 
EASIER TO USE 
LESS EXPENSIVE
CHEMICAL SENSORS 
• REMOTE SPECTROSCOPY 
• GROUNDWATER AND SOIL CONTAMINATION 
• MAJOR PLAYERS IN CHEMICAL SENSORS 
1) PHARMACIA BIOTECH (SWEDEN) 
2) FIBERCHEM 
3) THE QUANTUM GROUP 
TEMPERATURE SENSORS 
• LARGEST COMMERCIALLY AVAILABLE SENSORS 
• RANGE -40 deg C TO 1000 deg C 
• US-SMALL COMPANIES, JAPAN- HITACHI n SUMITOMO
MILITARY AND LAW ENFORCEMENT • 
THIS SENSOR ENABLES LOW LIGHT IMAGING AT TV FRAME 
RATES AND ABOVE WITHOUT THE LIMITATIONS OF VACUM TUBE 
BASED SYSTEMS.

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Optical sensors مجسات ضوئية

  • 2. INTRODUCTION WHY OPTICAL SENSORS ? PRINCIPLE OF OPTICAL SENSORS CLASSIFICATION AND COMPARISON SOME INTERESTING APPLICATIONS WHERE DO WE GO FROM HERE ?
  • 3. • NEW REVOLUTION OF OPTICAL FIBER SENSORS • IT IS A “SPIN-OFF” FROM OTHER OPTICAL TECHNOLOGIES • SEEING THE POTENTIAL IN SENSING APPLICATIONS – DEVELOPED AS ITS OWN FIELD
  • 4. • ELECTROMAGNETIC IMMUNITY • ELECTRICAL ISOLATION • COMPACT AND LIGHT • BOTH POINT AND DISTRIBUTED CONFIGURATION • WIDE DYNAMIC RANGE • AMENABLE TO MULTIPLEXING
  • 5. •LIGHT BEAM CHANGES BY THE PHENOMENA THAT IS BEING MEASURED •LIGHT MAY CHANGE IN ITS FIVE OPTICAL PROPERTIES i.e INTENSITY, PHASE, POLARIZATION,WAVELENGTH AND SPECTRAL DISTRIBUTION
  • 6. EP(t)cos[ωt+θ(t)] • INTENSITY BASED SENSORS – EP (t) • FREQUENCY VARYING SENSORS - ωP(t) • PHASE MODULATING SENSING- θ(t) • POLARIZATION MODULATING FIBER SENSING
  • 7. • EXTRINSIC SENSORS WHERE THE LIGHT LEAVES THE FEED OR TRANSMITTING FIBER TO BE CHANGED BEFORE IT CONTINUES TO THE DETECTOR BY MEANS OF THE RETURN OR RECEIVING FIBER
  • 8. • INTRINSIC SENSORS INTRINSIC SENSORS ARE DIFFERENT IN THAT THE LIGHT BEAM DOES NOT LEAVE THE OPTICAL FIBER BUT IS CHANGED WHILST STILL CONTAINED WITHIN IT.
  • 9. EXTRINSIC INTRINSIC APPLICATIONS- ROTATION, ACCELERATION, STRAIN, ACOUSTIC PRESSURE AND VIBRATION. MORE SENSITIVE TOUGHER TO MULTIPLEX REDUCES CONNECTION PROBLEMS MORE ELABORATE SIGNAL DEMODULATION MORE EXPENSIVE APPLICATIONS-TEMPERATURE, PRESSURE,LIQUID LEVEL AND FLOW. LESS SENSITIVE EASILY MULTIPLEXED  INGRESS/ EGRESS CONNECTION PROBLEMS EASIER TO USE LESS EXPENSIVE
  • 10. CHEMICAL SENSORS • REMOTE SPECTROSCOPY • GROUNDWATER AND SOIL CONTAMINATION • MAJOR PLAYERS IN CHEMICAL SENSORS 1) PHARMACIA BIOTECH (SWEDEN) 2) FIBERCHEM 3) THE QUANTUM GROUP TEMPERATURE SENSORS • LARGEST COMMERCIALLY AVAILABLE SENSORS • RANGE -40 deg C TO 1000 deg C • US-SMALL COMPANIES, JAPAN- HITACHI n SUMITOMO
  • 11. MILITARY AND LAW ENFORCEMENT • THIS SENSOR ENABLES LOW LIGHT IMAGING AT TV FRAME RATES AND ABOVE WITHOUT THE LIMITATIONS OF VACUM TUBE BASED SYSTEMS.