JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

Optical Fibers: Structures, waveguiding and Fabrication: Nature of Light, Basic optical laws and definitions, Single mode fibers, Graded index fiber structure, Attenuation, Signal Dispersion in fibers. Optical Sources- LEDs, Laser Diodes, Line Coding.

UNIT - II

Photo detectors: Photo detector Noise, Detector Response Time, Avalanche Multiplication Noise. Optical Receiver Operation: Fundamental receiver operation, Digital receiver performance, Eye diagrams. WDM Concepts and Components: Passive optical Couplers, Isolators and Circulators

UNIT - III

Digital Links: Point to point links, power penalties, error control, Coherent detection, Differential Quadrature Phase Shift Keying. Analog Links: Carrier to noise ration, Multichannel Transmission Techniques, RF over Fiber, Radio over fiber links, Microwave Photonics.

UNIT - IV

Optical Networks: Network Concepts, Network Topologies, SONET/SDH, High speed lightwave links, Optical add/ Drop Multiplexing, Optical Switching, WDM Network, Passive Optical Networks, IP Over DWDM, Optical Ethernet, Mitigation of Transmission Impairments

UNIT - V

Performance Measurement and Monitoring: Measurement standards, Basic Test Equipment, Optical power measurement, Optical fiber characterization, Eye diagram tests, optical time domain reflectometer, optical performance monitoring, optical fiber system performance measurements.

TEXTBOOKS:

• 1. Gerd Keiser, “Optical Fiber Communications”, 5th Edition, Mc Graw Hill.
• 2. Rajeev Ramaswamy and Kumar N Sivarajan, “Optical Networks: A Practical Perspective”, 2nd Ed., 2004, Elsevier Morgan Kaufmann Publishers (An imprint of Elsevier).

REFERENCE BOOKS:

nd

• 1. John. M. Senior, “Optical Fiber Communications: Principles and Practice”, 2 Ed, 2000, PE. nd
• 2. Harold Kolimbris, “Fiber Optic Communication”, 2 Ed, 2004, PEI
• 3. Uyless Black, “Optical Networks: Third Generation Transport Systems”, 2nd Ed, 2009, PEI nd
• 4. Govind Agarwal, “Optical Fiber Communications”, 2 Ed, 2004, TMH.
• 5. S. C. Gupta, “Optical Fiber Communications and its Applications”, 2004, PHI M. TECH. I YEAR I SEMESTER DIGITAL ELECTRONICS AND COMMUNICATION ENGINEERING/ DIGITAL ELECTRONICS AND COMMUNICATION SYSTEMS DIGITAL SYSTEM DESIGN LAB Part –I Programming can be done using any complier. Down load the programs on FPGA/CPLD boards and performance testing may be done using pattern generator (32 channels) and logic analyzer apart from verification by simulation with any of the front end tools.
• 1. HDL code to realize all the logic gates
• 2. Design and Simulation of adder, Serial Binary Adder, Multi Precession Adder, Carry
• 3. Look Ahead Adder.
• 4. Design of 2-to-4 decoder
• 5. Design of 8-to-3 encoder (without and with parity)
• 6. Design of 8-to-1 multiplexer
• 7. Design of 4 bit binary to gray converter
• 8. Design of Multiplexer/ Demultiplexer, comparator
• 9. Design of Full adder using 3 modeling styles
• 10. Design of flip flops: SR, D, JK, T
• 11. Design of 4-bit binary, BCD counters ( synchronous/ asynchronous reset) or any sequence counter
• 12. Design of a N- bit Register of Serial- in Serial –out, Serial in parallel out, Parallel in
• 13. Serial out and Parallel in Parallel Out.
• 14. Design of Sequence Detector (Finite State Machine- Mealy and Moore Machines).
• 15. Design of 4- Bit Multiplier, Divider.
• 16. Design of ALU to Perform – ADD, SUB, AND-OR, 1’s and 2’s Compliment,
• 17. Multiplication, and Division.
• 18. Design of Finite State Machine.
• 19. Implementing the above designs on Xilinx/Altera/Cypress/equivalent based FPGA/CPLD kits . Part –II
• 1. Static and Dynamic Characteristics of CMOS Inverter
• 2. Implementation of EX-OR gate using complementary CMOS, Psedo-NMOS, Dynamic and domino logic style
• 3. Implementation of Full Adder using Transmission Gates