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Viewing report
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Future Optical Communications Systems
Optoelectronics Industry Development Association, June 2008, Pages: 106
The communication equipment industry has survived the bubble and returned to health. Video is an important revenue generating platform for both cable and telecom service providers and will also impact heavily on the traffic management issue. The near term needs can be met by improving the performance of the present set of optoelectronics devices such as distributed feedback (DFB) laser arrays, tunable lasers, fast and complex modulators, arrayed waveguide gratings (AWG), and reconfigurable optical add drop multiplexers (ROADM). The use of electronic and optical compensation techniques and new signal encoding formats have extended the reach of directly modulated lasers. Low-cost optical-electrical-optical (OEO) conversions allow an alternate approach to network evolution. Coherent transmission eliminates signal impairments but presents multiple challenges.
In the fiber to the home/curb environment, the potential for truly photonic integrated circuits to reduce assembly costs and simplify functionality is slowly becoming a reality. 100 Gb/s transport in the core is achievable to accommodate the Internet growth forecast in the short-term. However, there is no such optoelectronics device base for a terabit/s network (which we now refer to as ‘terabit photonics’). We need to advocate the initiation of comprehensive R&D efforts to generate new device and system concepts over the next decade. In fact, we now expect the demand for high speed bandwidth to exceed our capacity significantly over the next decade. This implies that network-choking will be an ongoing problem similar to ‘traffic jams’ in major cities today.
In addition, components suppliers need to furnish devices and/or modules with high per-formances and more functions at low cost to meet future requirements. This may mean that some device/module manufacturers will turn to the consumer market for volume scaling. The threat of display-choking (communicating in and out of the display with a remote processor) is emerging on the radar screens of many television manufacturers as they progress towards high-definition television (HDTV). By providing the consumer with an active cable solution with embedded optics, it may be possible to reduce 10 Gbps technology cost through volume production to ease the issues of display-choking.
The conclusion of this forum is to pursue photonics integration. Only viable photonics integration processes can achieve this goal and keep up with future needs of communication systems beyond terabit/s. We must promote the adoption of viable integration processes to sustain progress. We also believe that photonics integration will positively impact the volume consumer market for interconnects in addition to the network edge.
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