METHOD FOR REDUCING THE LEVEL DYNAMIC VARIATION IN AN OPTICAL TRANSMISSION SYSTEM

摘要

A device and method for reducing level dynamics in an optical star bus transmission system is disclosed wherein variable electrical resistors are connected in series to the electro-optical transmission elements of the system transmitters and are selectively adjusted so that differences in the signal power levels at a selected system receiver are reduced to zero, and hence the differences in the signal power levels at the remaining system receivers are substantially reduced. Furthermore, variable electrical resistors are connected in series to the gain controlling resistors of the amplifier stages of the receivers of the system so that when any specific transmitter couples power into the system, differences in the output levels of the amplifier stages of the receivers are also substantially reduced. The invention may be practiced with trimming potentiometers.