Lad. Vandenbroeke et al., A LOW-COST MULTICHANNEL OPTICAL-TRANSMISSION SYSTEM FOR VIDEO SIGNALS, IEEE transactions on communications, 43(9), 1995, pp. 2493-2501
A novel low-cost multichannel optical transmission system for video si
gnals is described, The system uses time-division multiplex pulse-posi
tion modulation (TDPPM), The transmitter and receiver are realized in
a standard bipolar process while an external low cost laser and PIN ph
otodiode are used. A maximum of 16 channels can be multiplexed, while
achieving a weighted signal-to-noise ratio (SNR) of 54 dB, a different
ial gain of 1% and a differential phase of 0.5 degrees. For a launched
power of 0 dBm (pulse amplitude), the optical budget for a 45 dB weig
hted SNR exceeds 20 dB, Besides video signals the system is also capab
le of handling other signals such as digital coded audio signals or co
mputer data, The feasibility of a four-channel system has been confirm
ed by measurements.