Passive Optical Components; an Integral Part of the Passive Optical Network System

Passive Optical Components


                           Passive Optical Components

                                                      
Passive optical components are the foundation stone of optical network systems. An optical network is a communication system that uses light signals, instead of electronic ones, to send information between two or more points. Most of these components such as optical connectors, optical encoders, optical couplers, optical power splitters, optical cables, optical transceivers, optical amplifiers, fixed and variable attenuators, optical filters, optical circulators, patch cords, and pigtails, wavelength division multiplexers/de-multiplexers, and others can now be found in use in the current data networks and fiber to the home (FTTH) applications.

The common passive optical components are optical connectors, optical attenuators, couplers or splitters, circulators, isolators, switches, filters, and OADM (optical add/drop multiplexer), etc. Moreover, these components are used in synchronous digital hierarchy (SDH) systems, the fiber in the loop (FITL), a loop feeder, hybrid fiber-coaxial cable (HFC), and asynchronous optical network (SONET). Passive optical components are widely used in FTTH networks to take advantage of optical signals to generate video signals. Passive optical components are data format transparent, combine and divide optical power in some predetermined ratio, regardless of the information content of the signals.

Passive optical components include a wide variety of applications, such as distribution, pump combiners for fiber amplifiers, optical taps for monitoring, multichannel transmission, optical connects, bit-rate limiters, polarization diversity, route diversity, interferometers, and coherent communication. Moreover, these components do not require electrical-to-optical or optical-to-electrical conversion during its operation. Furthermore, passive optical solutions are more eco-friendly compared to conventional copper-based Ethernet local area networks. Thus, there is an increasing demand for passive optical components worldwide.

For example, in October 2021, Rochester’s Precision Optical Transceivers Inc., a provider of optical transceivers and related active/passive optical components, acquired nine patents from the United States Patent and Trademark Office in the areas of optical networking, integrated photonics, and photonic radio systems.


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