fiber optic communications te-504 department of te&ce iiu islamabd
DESCRIPTION
Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd. Instructor :Engr. Muhammad Ashraf Bhutta. Lecture 1 - outline. Course info Fiber optic introduction fiber basics history modulation formats digital/analog modulation ray optics description of fibers - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/1.jpg)
Fiber Optic Communications
TE-504Department of TE&CE IIU
IslamabdInstructor :Engr. Muhammad Ashraf
Bhutta
![Page 2: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/2.jpg)
Lecture 1 - outline
• Course info• Fiber optic introduction• fiber basics• history• modulation formats• digital/analog modulation• ray optics description of fibers• Relevant chapters in the book:1-2.1
![Page 3: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/3.jpg)
Course outline
• week.1 Introduction, Optical fibers - geometrical description
• week.2Optical fibers - waveguiding, Maxwells equations
• week 3 Optical fibers - dispersion, pulse broadening, attenuation
• week 4 Optical fibers - nonlinearities • Week 5 Solitons, nonlinear phenomena • week 6 Light emitting diodes, semiconductor
lasers
![Page 4: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/4.jpg)
Course outline…
• week 7 Photodetectors, receivers • Week 8 Optical amplifiers • Week 9 Optical amplifiers • Week 10 Receiver performance • Week 11 System design • Week 12 Dispersion compensation • Week 13 Multi-channel systems, WDM / OTDM • Week 14 Coherent systems, Microwave
Photonics• NOTE: Each week we,ll have two
lectures(02hrs+01hrs)
![Page 5: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/5.jpg)
Home assignment, Research
papers• 4 Assignments• Three quizez• Two research Papers on the topics covered in the course• Text books• Fiber Optic Communications Technology 3rd edition By
Djafar K. • Optical fiber communications Third edition by Gerd
Keiser• Fiber Optic Communication systems Third Edition by
Govind p. Agrawal
![Page 6: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/6.jpg)
A definition of Fiber Optics
• Utilization of electromagnetic waves in dielectric, circular waveguides combined with optoelectronic devices (LEDs, lasers, photodiodes, amplifiers, etc.)
• Applications of fiber optics:• communication• medical applications• optical sensing• power distribution• welding, drilling...
![Page 7: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/7.jpg)
Some definitions
• Visible spectrum 0.4 to 0.7 micrometer
• Optical (guided light) communication field 700-1600 nm
• Reflection and refraction
• refractive index n=c/v
• Dispersion: process of separating light into each of its component frequencies.
![Page 8: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/8.jpg)
• Diffraction:bending of light as it passes through an openong in an obstacle
• Absorption:conversion of light into heat• Amount of energy contained in light is
determined by wavelength or frequency• E=hf(joules per photon)• Light passing from a lower refractive index
to a higher one is bent toward the normal
![Page 9: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/9.jpg)
Fresnel reflection
• Independentof the index of the two media , a small portion of light will always be reflected when light passes from one index to another ,this is called fresnel reflecton(p)
• P=(n-1/n+1)2
• dB=10log10(1-p)
![Page 10: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/10.jpg)
The electromagnetic spectrum
![Page 11: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/11.jpg)
Fiber Optic Commnication Link
![Page 12: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/12.jpg)
Optical Fibers
![Page 13: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/13.jpg)
A multi-disciplinary technology
![Page 14: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/14.jpg)
Undersea systems
![Page 15: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/15.jpg)
Fiber basics
![Page 16: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/16.jpg)
Optical Fibers
![Page 17: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/17.jpg)
Fiber advantages
• Low attenuation (0.2 dB/km)• Large bandwidth (35 THz)• Wavelength independent attenuation in
the transmission window• The enormous capacity of an installed
fiber can be utilized in future as the demand increases
• Small geometry and low weight• Flexible• Easy to install•
![Page 18: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/18.jpg)
Fiber advantages……
• Low sensitivity to moisture• The fiber endpoints handle large
differences in voltage• Immune to electromagnetic interference• No crosstalk between fibers• Damage can not cause sparking• Potentially low cost• Well suited for future broadband
services
![Page 19: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/19.jpg)
WDM-OTDM
![Page 20: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/20.jpg)
Progress in Lightwave communication (2)
![Page 21: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/21.jpg)
Direct detection digital and analog systems
![Page 22: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/22.jpg)
Analog and digital signals
![Page 23: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/23.jpg)
The dB units
![Page 24: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/24.jpg)
Fiber types
![Page 25: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/25.jpg)
Ray-optics description of step-index fiber (1)
![Page 26: Fiber Optic Communications TE-504 Department of TE&CE IIU Islamabd](https://reader036.vdocuments.net/reader036/viewer/2022062500/5681516e550346895dbf9f71/html5/thumbnails/26.jpg)
Numerical apereture