Method for detecting one or more free channels in an optical time multiplexed signal, a device for implementation and an application of the device

摘要

The system enables insertion of additional components in free channels within multiplex signal. The procedure for detecting one or more free channels in a time multiplex optical signal (E) includes sampling (105, 110) the successive optical pulses of at least one of the channels (1-N). The sampling is carried out in cooperation with a clock signal matching that of the multiplex signal. The average optical power of the sampled pulses is measured (119-122) during a predetermined time interval. A detection signal is generated (150) when the average optical power is less than or equal to a predetermined threshold value.