Patent ID: 6804466
Filing Date: 2004-10-12
Classification: H04B

Abstract:
A coding system with a data transmission device with at least one laser transmitter and a code generator for communicating with a laser receiver having a detector device for receiving a strong pulse sequence of narrow pulse width from 100 to 200 ns and an evaluation circuit for decoding the code generator comprising:the data transmission device is a CW-capable laser diode of a wavelength wherein a laser beam can be switched on and off in a burst sequence which contains at least a main series of bursts of a repetition rate T having a length d of the pulses of about 400 ns and the bursts consists of a number b of pulses having a combined pulse length D which is less than a threshold value Tg=1000 &mgr;s, said burst sequence emulating a strong pulse sequence of narrow pulse width from 100 to 200 ns.