EC2402 OPTICAL COMMUNICATION AND NETWORKING Lecture Notes for ECE - Seventh (7th) semester
EC2402 Lecture Notes
UNIT I INTRODUCTION
Introduction, Ray theory transmission- Total internal reflection-Acceptance angle –
Numerical aperture – Skew rays – Electromagnetic mode theory of optical propagation –
EM waves – modes in Planar guide – phase and group velocity – cylindrical fibers –
UNIT II TRANSMISSION CHARACTERISTICS OF OPTICAL FIBERS
Attenuation – Material absorption losses in silica glass fibers – Linear and Non linear
Scattering losses - Fiber Bend losses – Midband and farband infra red transmission –
Intra and inter Modal Dispersion – Over all Fiber Dispersion – Polarization- non linear
Phenomena. Optical fiber connectors, Fiber alignment and Joint Losses – Fiber Splices
– Fiber connectors – Expanded Beam Connectors – Fiber Couplers.
UNIT III SOURCES AND DETECTORS
Optical sources: Light Emitting Diodes - LED structures - surface and edge emitters,
mono and hetero structures - internal - quantum efficiency, injection laser diode
structures - comparison of LED and ILD
Optical Detectors: PIN Photo detectors, Avalanche photo diodes, construction,
characteristics and properties, Comparison of performance, Photo detector noise -Noise
sources , Signal to Noise ratio , Detector response time.
UNIT IV FIBER OPTIC RECEIVER AND MEASUREMENTS
Fundamental receiver operation, Pre amplifiers, Error sources – Receiver Configuration
– Probability of Error – Quantum limit.
Fiber Attenuation measurements- Dispersion measurements – Fiber Refractive index
profile measurements – Fiber cut- off Wave length Measurements – Fiber Numerical
Aperture Measurements – Fiber diameter measurements.
UNIT V OPTICAL NETWORKS
Basic Networks – SONET / SDH – Broadcast – and –select WDM Networks –
Wavelength Routed Networks – Non linear effects on Network performance –
Performance of WDM + EDFA system – Solitons – Optical CDMA – Ultra High Capacity