introduction to optical communication
TRANSCRIPT
Introduction to Optical Fiber Communication
Lokendra Pankaj
Assistant Professor
Dept. of Electronics & Comm. Engg.
Content
• Frequency band and wavelength for OFC
• Principal of optical fiber communication
• Communication types
• General communication system
• Optical fiber communication system
• Transmitter section
• Splices and coupler
• Receiver section
Communication System
Wireless Wired
(Free Space) 1. Copper Cable (KHz)
(KHz, MHz GHz) 2. Wave Guide (GHz)
3. Optical Fiber Comm. ( THz)
General Communication systems
Transmitter section
Wireless channel
Receiver section
Information source
Destination
Transmitter antenna
Receiver antenna
Optical Communication systems
Amplifier
Splice
Coupler
Photo detector
Light SourceDrive Circuit
(V-I convertor)
Optical RxOptical Rx
Eletrical Signal
Transmitter Section
To other circuit
Optical s/g
Optical s/g
Optical s/g
Optical TxOptical Tx
Electronic CircuitElectronic Circuit
Electrical s/g
Optical s/g
To the
destination
Repeater
Connector
Electrical s/g
Receiver section
Optical Fiber Cable
Transmitter Section
1. Drive Circuit (V-I convertor) :-it provide the electrical interface b/w input circuitry and light source.
2. Light source :- It convert the electrical input current into the optical
signal.
we can use LED and laser.
3. Connector :- It is a temporary connection b/w light source and ofc cable.
Splices
• Splices:-– A permanent connection b/w fiber to fiber is called
splice.– It is also two type
1. Fusion 2. Mechanical
• Glass electrode before
installation• Optical mechanical gel after
installation
• Ferrule
• V-Grove
• 3 Tube
Photo Detector :-
•We can use PIN diode or Avalanche photo diode as a photo detector.•Photo detector convert the optical signal into the electrical output.
Receiver Section