Subcarrier multiplexing for lightwave networks and video distribution systems

Abstract

Figure 3Shape of the pulse modulating the second harmonic of the photocurrent, as detected at three different distances from the reference coordinate z = 147.9 Km, which is one of the zeros of the second-harmonic amplitude in the no-modulation case. The values of IZ. m, and D are as in Figure 1. Note how the amplitude of the pulse decreases as the pulse approaches this point, and then increases again pulse broadening, but rather through harmonic and interharmonic distortions of the subcarriers.Using this approach to consider the interharmonic distortion of two or more subcarriers, though involving lengthier calculations, would present no formal difficulty. REFERENCES 1. R. Olshansky, V. Lanzisera, and P. M. Hill, "Subcarrier Multiplexed Lightwave Systems for Broad-Band Distribution," IEEE ABSTRACT This article describes a technique to reduce the poor conditioning of linear systems to be solved for numerical inverse-scattering solutions based on integral formulations and on the moment method. Some preliminary results are reported to show the improvemeni over a previously proposed approach. 0 1993 John Wiley & Sons. Inc. ABSTRACT A phase-encoded object has been modeled as the input to a joint transform correlator. The joint transform power spectrum is modeled as a binary phase object to calculate the correlation output. The results have been experimentally verified using a liquid-crystal television operating in the phase modulation mode. 0 1993 John Wiley & Sons, Inc.

Fiber to the Home Using a PON Infrastructure

“…As in the SCMA scheme, the required modulation bandwidth is typically quite large due to the double-sided nature of the RF-modulated signals and the required RF-frequency locations to avoid any nonlinear distortions [18]. In addition, extra care is required to avoid any clipping noise induced by the threshold characteristics of the laser transmitter [19]. Also, due to the high-linearity requirements, the individual RF signal received at each ONT must decrease in proportion to the number of signals multiplexed onto the downstream-optical carrier.…”

Optical Power Reduction for Multiple-Subcarrier Modulated Indoor Wireless Optical Channels

“…The MSM techniques have been applied on the optical fibre channels to sup port video distribution systems [30]. Independent information is modulated onto narrow-band electrical carriers with different frequencies.…”

Chromatic dispersion power penalties in orthogonal subcarrier--optical tandem single sideband systems

“…Subcarrier Multiplexed (SCM) systems [1] have received a considerable amount of interest in the last decade, mainly in areas such as radio-on-fiber systems and multi-channel video distribution [2,3]. A significant advantage of optical SCM systems is that the RF components needed are more mature compared to their optical counterpart, for instance, the availability of a stable RF oscillator and the high resolution RF filters.…”