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Introduction to Optical Fiber Communication – EE 046342

Introduction to Optical Fiber Communication – EE 046342. נכתב על יד גדי איזנשטיין ודוד דהן כל הזכויות שמורות. אין להשתמש בחומר זה שלא במסגרת הקורס. מבוא לתקשורת בסיבים אופטיים. חלקים מהחומר המופיע בחומר ההרצאות נלקח מהמקורות הבאים: G.P Agrawal Fiber Optics Communication Systems

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Introduction to Optical Fiber Communication – EE 046342

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  1. Introduction to Optical Fiber Communication – EE 046342 נכתב על יד גדי איזנשטיין ודוד דהן כל הזכויות שמורות. אין להשתמש בחומר זה שלא במסגרת הקורס מבוא לתקשורת בסיבים אופטיים חלקים מהחומר המופיע בחומר ההרצאות נלקח מהמקורות הבאים: G.P Agrawal Fiber Optics Communication Systems G.P Agrawal Nonlinear Fiber Optics E. Desurvire Erbium Doped Fiber Amplifiers L. Kazovsky, S. Benedetto, A. Willner Optical Fiber Communication Systems אתרי אינטרנט שונים

  2. In the 19th century …. In 1870, John Tyndall, using a jet of water that flowed from one container to another and a beam of light, demonstrated that light used internal reflection to follow a specific path. As water poured out through the spout of the first container, Tyndall directed a beam of sunlight at the path of the water. The light, as seen by the audience, followed a zigzag path inside the curved path of the water. This simple experiment, illustrated in the figure below, marked the first research into the guided transmission of light. Invented in the early 1970th and perfected in the next ten to twenty years, glass fibers have become the medium of choice for ALL broad band data transmission And about one century later Guiding light

  3. Trans oceanic fiber cables

  4. Data - modulation format Most common, usually NRZ, simple direct detection receiver

  5. Data - modulation format Recent years DPSK QPSK Multi level ASK

  6. Fiber loss spectrum

  7. Fiber dispersion spectrum

  8. <

  9. The Growth of Optical Fiber Transmission Capacity

  10. MULTIPLEXING In order to increase the capacity beyond the single channel limit use Multiplexing in either time domain (OTDM) or wavelength domain (WDM) WDM became the most important development of the 1990th without which no internet could be implemented

  11. מגברים אופטיים פתרו כמעט לחלוטין את בעיית ההפסדים הן לערוץ בודד והן לאותות רבי ערוצים גם הדיספרסיה ניתנת לתקון פשוט יחסי מכיוון שהיא תופעה ליניארית לחלוטין -DL DL מפצה דיספרסיה סיבים מיוחדים (DCF) סריגי סיבים, מוליכי גלים המבוססים על גבישים פוטוניים

  12. Polarization mode dispersion • All fibers are somewhat birefringent • The birefringence is random • Leads to a fundamental limitation on pulse fidelity • Linear and nonlinear PMD • Hard to compensate

  13. Course plan • Introduction • Linear propagation in fibers • Fiber nonlinearities • WDM systems • Optical amplifiers • Detection issues

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