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OFDM for Optical Communications by Ivan Djordjevic, William Shieh

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Chapter 5 Polarization Effects in Optical Fiber

5.1 Introduction

It is well known that single-mode fiber (SMF) supports two polarization modes. The asymmetry of optical fiber leads to polarization mode coupling or random polarization rotation along a sufficiently long fiber, which is called polarization mode dispersion (PMD).1,2 This polarization effect has long been considered a nuisance rather than a benefit to take advantage of in the mainstream of optical communications. Random polarization rotation can be overcome by using a polarization maintain fiber (PMF). However, it is cost-prohibitive for long-haul applications. The rapid stride toward high-speed transmission at 40 Gb/s and beyond has spurred extensive research efforts to understand ...

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