05-04-2011, 10:15 AM
PRESENTED BY-
VAIBHAV DESHWAL
PHOTONICS (1).ppt (Size: 427.5 KB / Downloads: 86)
“PHOTONICS”
INTRODUCTION
The science of photonics includes –
Generation
Emission
Transmission
Modulation
Signal processing
Switching
Amplification
Detection
Sensing
• Its goal was to use light to perform functions that traditionally fell within the typical domain of electronics, such as telecommunications, information processing, etc.
• Photonics is related to quantum optics, optomechanics, electrooptics, optoelectronics and quantum electronics
History
• Photonics as a field began with the invention of the laser in 1960.
• Photonics goal waswas to use light to perform functions that traditionally fell within the typical domain of electronics, such as telecommunications, information processing, etc.
• Developments followed optical fiber and erbium -doped fiber ampifier, which formed the basis of telecom. revolution and gave the infrastucture of internet.
Principle
Components
• Generator-. Photonics commonly uses semiconductor light sources like LEDs, superluminescent diodes, and lasers
• Other light sources include fluorescent lamps,CRTs, and plasma screens .
2.Transmission media-
Light can be transmitted throug any transparent medium. Glass fiber or plastic optical fiber can be used to guide the light along a desired path. In optical communications optical fibers allow fortransmission distances of more than 100 km.
3. Amplifier-
• Optical amplifiers are used to amplify an optical signal. Optical amplifiers used in optical communications are erbium-doped fiber amplifiers, semiconductor optical amplifiers, Raman amplifiers andoptical parametric amplifiers
4.Detector-
• Photodetectors detect light. Photodetectors range from very fast photodiodes for communications applications over medium speed charge coupled devices (CCDs) for digital cameras to very slow solar cells that are used for energy harvesting from sunlight.
5. Modulation-
• Modulation of a light source is used to encode information on a light source. Modulation can be achieved by the light source directly. One of the easiest examples is to use a flashlight to send Morse code. Another method is to take the light from a light source and modulate it in an external optical modulator.
VAIBHAV DESHWAL
PHOTONICS (1).ppt (Size: 427.5 KB / Downloads: 86)
“PHOTONICS”
INTRODUCTION
The science of photonics includes –
Generation
Emission
Transmission
Modulation
Signal processing
Switching
Amplification
Detection
Sensing
• Its goal was to use light to perform functions that traditionally fell within the typical domain of electronics, such as telecommunications, information processing, etc.
• Photonics is related to quantum optics, optomechanics, electrooptics, optoelectronics and quantum electronics
History
• Photonics as a field began with the invention of the laser in 1960.
• Photonics goal waswas to use light to perform functions that traditionally fell within the typical domain of electronics, such as telecommunications, information processing, etc.
• Developments followed optical fiber and erbium -doped fiber ampifier, which formed the basis of telecom. revolution and gave the infrastucture of internet.
Principle
Components
• Generator-. Photonics commonly uses semiconductor light sources like LEDs, superluminescent diodes, and lasers
• Other light sources include fluorescent lamps,CRTs, and plasma screens .
2.Transmission media-
Light can be transmitted throug any transparent medium. Glass fiber or plastic optical fiber can be used to guide the light along a desired path. In optical communications optical fibers allow fortransmission distances of more than 100 km.
3. Amplifier-
• Optical amplifiers are used to amplify an optical signal. Optical amplifiers used in optical communications are erbium-doped fiber amplifiers, semiconductor optical amplifiers, Raman amplifiers andoptical parametric amplifiers
4.Detector-
• Photodetectors detect light. Photodetectors range from very fast photodiodes for communications applications over medium speed charge coupled devices (CCDs) for digital cameras to very slow solar cells that are used for energy harvesting from sunlight.
5. Modulation-
• Modulation of a light source is used to encode information on a light source. Modulation can be achieved by the light source directly. One of the easiest examples is to use a flashlight to send Morse code. Another method is to take the light from a light source and modulate it in an external optical modulator.