N-GEN Communications Web-based Seminars ©NGCS

Seminar - An Overview of Communications Technologies

Module 5 - SONET, WDM, DWDM and B-ISDN Technologies                                                              Slide 11 of 76 _________________                                                                                  __________

                                          Infrared Spectrum

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Optical transmission is very closely interwoven between a light source, composition of the optical and a detector. A light source emits a wavelength to travel through the fiber. This wave is modulated to carry data. The modulated pulse, as it travels through the fiber, becomes distorted. The wavelengths ( 1.3 - 1.5 micrometers) in the infrared spectrum region are better suited for optical communications.