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High Speed Data Transmission Through Optical Fiber Using
Semiconductor Device
Group Members
Amin , Md. Sadeq-Ul : 09-14526-3 Mahfuz , Muhammad : 09-14839-3 Zihad , Fakir Sheik : 09-14949-3 Bhowmik , Bijoy Kumar : 09-14832-3
INTRODUCTIONTwo types of light sources are commonly used for optical fiber in communications applications. These sources are the light emitting diode(LED) and the semiconductor laser(or laser diode).
Objectives/Goals The objectives of this works are To Introduce optical fiber communication system. To study high speed data transmission though optical
fiber using semiconductor laser To obtain the performance characteristics of a
designed laser
MATERIALS Fibers of Glass Usually 120 micrometers in diameter Used to carry signals in the form of light over distances upto 50Km without any repeater Core-thin glass center of the fiber where light travels Cladding-outer optical material surrounding the core Buffer Coating-plastic coating that protects the fiber
Types of Optical Fiber Multimode Fiber Single Mode Fiber
Types of Semiconductor Lasers
i. Emission dependent : 1) Edge Emitting Laser 2)Surface Emitting Laser
ii. Wavelength dependent : 1) Short wavelength Laser 2) long wavelength Laser
STRUCTURE OF A LASER
The Structure of a laser is combined with Homo-junction, Hetero-junction, P-type & N-type materials with also energy
band as a recombination mechanisms
Rate Equations
• The rate of carrier density of a Laser is
•The rate of change of photon density of a Laser is
Rate Equations
• The threshold current of a Laser is
•The Modulation response with frequency can be expressed as
Rate Equations
• The K-factor is define as
•The d-factor of Laser is related to the differential gain and can be written as
Rate Equations
• The Resonant Frequency of a laser is define as
•The output of Laser is written as
Methodology For the codes & simulation work we
will use two softwares.Theyare
Matlab Optisym simulator
TransmitterEDFA & SOA will use as a optical amplifier
Application
Application
LONG DISTANCE COMMUNICATION LOCAL AREA NETWORK XRAY IMAGING NIGHT VISION ENDOSCOPE CCTV CABLE TV CORROSION SENSING OUTSIDE PLANT Vs PREMISES INSTALLATION
References
Semiconductor-Laser Fundamentals by Weng W.Chow Stephen W.Koch
Diode Lasers and Photonic Integrated Circuits by L.A.COLDREN & S.W.CORZINE
FUNDAMENTALS OF LIGHT SOURCES AND LASERS by Mark Csele
References
LIBRARY BOOKSBOOK : THE LASERBOOK : INTRO TO FIBER OPTICS BOOK : OPTICAL COMMUNICATION SYSTEMShttp://
books.google.com/books/about/Optical_fibre_communication.html (FROM INTERNET)
http://books.google.com/books/about/Fiber_Optic_Reference_Guide.html (FROM INTERNET)
References
THE END