By Le Nguyen Binh
IntroductionDigital Optical Communications and Transmission platforms: tough matters allowing TechnologiesOrganization of ebook Chapters Photonic Transmitters Optical Modulators Return-to-Zero Optical Pulses Differential part Shift Keying iteration of Modulation FormatsSpectral features of electronic Modulation codecs comments Optical Receivers and Transmission Performances electronic Optical Receivers functionality review of Binary Amplitude Modulation structure Quantum restrict of Optical Receivers below various Modulation codecs Binary Coherent Optical Receiver Non-coheret Detection for. Read more...
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Extra resources for Digital Optical Communications
Crivelli. 2005. Maximum-likelihood sequence estimation in dispersive optical channels. IEEE Journal of Lightwave Technology 23 (2): 749–62. 59. Napoli, A. 2006. Limits of maximum-likelihood sequence estimation in chromatic dispersion limited systems. In Proceedings of OFC’06, Paper JThB36, Anaheim, CA. 60. Haunstein, H. 2004. PMD and chromatic dispersion control for 10 and 40 Gb/s systems. In Proceedings of OFC’04, Invited Paper, ThU3, Anaheim, CA, 1–4. 1 OPTICAL MODULATORS Modulation of lightwaves via an external optical modulator can be classified into three types depending on the special effects that alter the property of lightwaves, especially the intensity or phase of the lightwave carrier.
1980. 7 μm spectral region. Optics Letters 5: 476–78. 4. , A. Gnauck, B. Kasper, J. Campbell, J. Veselka, J. Talman, and A. McCormick. 1987. 8-Gbit/s transmission experiment over 68 km of optical fiber using a Ti:LiNbO3 external modulator. IEEE J. Lightwave Technology 5 (10): 1505–09. 5. Kogelnik, H. 1985. High-speed lightwave transmission in optical fibers. Science 228: 1043–48. Introduction 15 6. Agrawal, G. P. 2002. Fiber-optic communication systems. 3rd ed. New York: Wiley. 7. Chraplyvy, A.
The spectral characteristics of these formats are also discussed in detail. In an optical transmitter, data modulation is implemented by using external electro-optic phase modulators (EOPM) or MZIMs. Phasor principles are extensively applied in this chapter to derive the modulation of the carrier phase and amplitude. Chapter 3 provides an insight into various advanced optical modulation formats, including RZ and NRZ pulse shaping, MSK and its multi-level version, and dual-level MSK. The focus of this chapter is the generation and detection schemes of these formats.