Proc. SPIE. 6776, Broadband Access Communication Technologies II
KEYWORDS: Data modeling, Modulation, Signal attenuation, Satellites, Digital video recorders, Multimedia, Orthogonal frequency division multiplexing, Broadband telecommunications, Standards development, Home networking
The Multimedia-over-Coax Alliance (MoCA) standard is rapidly emerging as the de-facto standard in North
America for multimedia home networking. This is driven by the desire to have digital content from various
sources such as DVRs, audio devices and PCs reliably available anywhere in the home using the in-home
existing coaxial cable wiring. The MoCA technology coexists with other services at the home such as cable
TV, cable modem, and satellite services. This technology achieves MAC throughputs exceeding 100 Mb/s in
97% of all outlets in the home with no changes to the home coax infrastructure, and with packet error rates
less than 10<sup>-5</sup>, and with an average latency of less than 3.5 milliseconds based on extensive field trial results.
Quantitative spectral analysis has been developed as an analytic tool for the identification and characterization of defects within the cavities of multilongitudinal mode semiconductor lasers. Unstressed lasers whose spectra suggest the presence of internal, manufacturing-related defects have failed at lower values of electrostatic discharge (ESD) stress than devices that are free of such defects. Lasers that have been selected with spectral analysis tend to fail only at the facets during ESD stress, suggesting that surface recombination and the associated optical absorption limit the stress performance. When the surface recombination velocity at the facets is reduced by passivation in aqueous solutions of ammonium sulfide, the laser failure voltage increases by more than a factor of 5 relative to unpassivated devices. The results of spectral analysis are compared with those of more conventional techniques, such as electroluminescence and low coherence reflectometry. We conclude by presenting recent results from spectral analysis during temperature cycling stress of low cost laser packages developed for fiber in the loop applications.
Conference Committee Involvement (2)
Broadband Access Communication Technologies II
10 September 2007 | Boston, MA, United States
Broadband Access Communication Technologies
2 October 2006 | Boston, Massachusetts, United States