Patent ID: 7643592

Claim:
A laser subsystem comprising: a local oscillator emitting an optical beam in the form of laser pulse trains; an energy amplification subsystem; spatially and temporally formatting arrangement formatting the optical beam; and controlling, monitoring and measuring arrangement, said subsystem further comprises: a semi-reflecting optical splitter placed at the output of the local oscillator; a photodiode placed on one of the channels of said splitter so as to receive a part of the optical beam, said photodiode delivering an electrical signal representative of said optical beam; and and a device for generating synchronization signals, the electrical signal taken from the photodiode being used as a clock signal for said device or said subsystem, the synchronization signals S SYNC taken from said device or from said subsystem being used to synchronize various optoelectronic elements of the subsystem, wherein the said device comprises: an internal clock emitting an internal clock signal oscillating at a second frequency roughly identical to a first frequency; electronic security management arrangement activating the following functions: “PARTIAL STOP”: the optoelectronic elements presenting a danger or likely to be damaged by a prolonged stoppage are switched off; “CLOCK ACTIVATION”: the internal clock is activated and replaces an external clock so that the synchronization signals essential to the correct operation of the subsystem are again activated correctly; “DISPLAY”: failure messages are displayed; “LIMIT TIME” all the components of the subsystem are stopped when the failure time of the external clock signals is greater than or equal a predetermined external clock is greater than or equal to a predetermined time.