OPTICAL UNIT FOR RESTORING A PULSE PATTERN, AND RECEIVER SUITABLE FOR USE IN A TRANSMISSION SYSTEM COMPRISING SUCH A UNIT

摘要

An optical unit for restoring a pulse pattern is described. The unit has an input for receiving a signal pulse series at a modulation period T and wavelength lambda hd p and comprises a pulsed laser for supplying a pulse series whose distance between two consecutive pulses is equal to n.T, in which n is an integer and is variable throughout the pulse series. Pulses of the signal pulse series can be injected into the pulsed laser. Moreover, the unit comprises at least a detection system arranged in the path of the radiation emitted by the pulsed laser, which system detects on the basis of a variation of a feedback-sensitive parameter of the laser.