A temporally modulated in rate and/or amplitude pulse laser system, comprising: - a first source (10, 11) comprising a mode-locking laser adapted to generate a source signal composed of source light pulses; - an optical amplifier system (30, 31, 32, 33) adapted to receive and amplify said source signal, wherein the temporally modulated pulse laser system includes: - a pulse selection or modulation device (20, 21, 22, 24, 80) comprising a pulse selector or modulator arranged between the first source and the optical amplifier system, the pulse selector or modulator being configured to select or modulate the source signal so as to form a main signal composed of one or more source light pulses, the main signal being temporally modulated in rate and/or amplitude; and - a second source emitting a secondary signal, - the laser system being configured to inject simultaneously, on the one hand, the main signal and, on the other hand, the secondary signal into said optical amplifier system (30, 31, 32, 33), the optical amplifier system (30, 31, 32, 33) forming, on the one hand, an amplified main signal that is temporally modulated in rate and/or amplitude and, on the other hand, an amplified secondary signal, - the secondary signal being modulated in real time as a function of the temporal modulation in rate and/or amplitude of the main signal, so as to stabilize the energy stored in the optical amplifier system (30, 31, 32, 33) as a function of time, and - the laser system being configured to spatially separate, to a first output, the temporally modulated in rate and/or amplitude amplified main signal, and, to a second output (S2,) the amplified secondary signal, characterized in that: - the second source comprises a laser diode emitting a secondary signal comprising secondary light pulses having a duration comprised between 1 and 20 nanoseconds. - a first source (10, 11) comprising a mode-locking laser adapted to generate a source signal composed of source light pulses; - an optical amplifier system (30, 31, 32, 33) adapted to receive and amplify said source signal, - a pulse selection or modulation device (20, 21, 22, 24, 80) comprising a pulse selector or modulator arranged between the first source and the optical amplifier system, the pulse selector or modulator being configured to select or modulate the source signal so as to form a main signal composed of one or more source light pulses, the main signal being temporally modulated in rate and/or amplitude; and - a second source emitting a secondary signal, - the laser system being configured to inject simultaneously, on the one hand, the main signal and, on the other hand, the secondary signal into said optical amplifier system (30, 31, 32, 33), the optical amplifier system (30, 31, 32, 33) forming, on the one hand, an amplified main signal that is temporally modulated in rate and/or amplitude and, on the other hand, an amplified secondary signal, - the secondary signal being modulated in real time as a function of the temporal modulation in rate and/or amplitude of the main signal, so as to stabilize the energy stored in the optical amplifier system (30, 31, 32, 33) as a function of time, and - the laser system being configured to spatially separate, to a first output, the temporally modulated in rate and/or amplitude amplified main signal, and, to a second output (S2,) the amplified secondary signal, - the second source comprises a laser diode emitting a secondary signal comprising secondary light pulses having a duration comprised between 1 and 20 nanoseconds.