To study about the various optical fiber modes, configuration and transmission characteristics of optical fibers
To learn about the various optical sources, detectors and transmission techniques
To explore various idea about optical fiber measurements and various coupling techniques
To enrich the knowledge about optical communication systems and networks
UNIT I INTRODUCTION TO OPTICAL FIBERS 9
Introduction-general optical fiber communication system- basic optical laws and definitions-optical modes and configurations -mode analysis for optical propagation through fibers-modes in planar wave guide-modes in cylindrical optical fiber-transverse electric and transverse magnetic modes- fiber materials-fiber fabrication techniques-fiber optic cables-classification of optical fiber-single mode fiber-graded index fiber.
UNIT II TRANSMISSION CHARACTERISTIC OF OPTICAL FIBER 9
Attenuation-absorption –scattering losses-bending losses-core and cladding losses-signal dispersion –inter symbol interference and bandwidth-intra model dispersion-material dispersion- waveguide dispersion-polarization mode dispersion-intermodal dispersion-dispersion optimization of single mode fiber-characteristics of single mode fiber-R-I Profile- cutoff wave length-dispersion calculation-mode field diameter.
UNIT III OPTICAL SOURCES AND DETECTORS 9
Sources: Intrinsic and extrinsic material-direct and indirect band gaps-LED-LED structures-surface emitting LED-Edge emitting LED-quantum efficiency and LED power-light source materials-modulation of LED-LASER diodes-modes and threshold conditions-Rate equations-external quantum efficiency-resonant frequencies-structures and radiation patterns-single mode laser-external modulation-temperature effort. Detectors: PIN photo detector-Avalanche photo diodes-Photo detector noise-noise sources-SNR-detector response time-Avalanche multiplication noise-temperature effects-comparisons of photo detectors.
UNIT IV OPTICAL RECEIVER, MEASUREMENTS AND COUPLING 9
Fundamental receiver operation-preamplifiers-digital signal transmission-error sources-Front end amplifiers-digital receiver performance-probability of error-receiver sensitivity-quantum limit. Optical power measurement-attenuation measurement-dispersion measurement- Fiber Numerical Aperture Measurements- Fiber cut- off Wave length Measurements- Fiber diameter measurements-Source to Fiber Power Launching-Lensing Schemes for Coupling Management-Fiber to Fiber Joints-LED Coupling to Single Mode Fibers-Fiber Splicing-Optical Fiber connectors.
UNIT V OPTICAL COMMUNICATION SYSTEMS AND NETWORKS 9
System design consideration Point – to –Point link design –Link power budget –rise time budget, WDM –Passive DWDM Components-Elements of optical networks-SONET/SDH-Optical Interfaces-SONET/SDH Rings and Networks-High speed light wave Links-OADM configuration-Optical ETHERNET-Soliton.
At the end of the course, the student should be able to:
Realize basic elements in optical fibers, different modes and configurations.
Analyze the transmission characteristics associated with dispersion and polarization techniques.
Design optical sources and detectors with their use in optical communication system.
Construct fiber optic receiver systems, measurements and coupling techniques.
Design optical communication systems and its networks.
- P Chakrabarti, “Optical Fiber Communication‖, McGraw Hill Education (India)Private Limited, 2016 (UNIT I, II, III)
- Gred Keiser,”Optical Fiber Communication‖, McGraw Hill Education (India) Private Limited. Fifth Edition, Reprint 2013. (UNIT I, IV, V)
- John M.Senior, ―Optical fiber communication‖, Pearson Education, second edition.2007.
- Rajiv Ramaswami, ―Optical Networks ― , Second Edition, Elsevier , 2004.
- J.Gower, ―Optical Communication System‖, Prentice Hall of India, 2001.
- Govind P. Agrawal, ―Fiber-optic communication systems‖, third edition, John Wiley & sons, 2004.