An analyser for analysing the spatial intensity distribution of a focused pulsed laser beam in a focal plane , which comprises, downstream of this plane and on the optical path: - a shaping lens , - a device for partially sampling the shaped beam, - a heat sink adapted to absorb the unsampled beam and to provide an absolute measurement of the laser energy and power thereof, - an image sensor , - an imaging lens able to form images of the plane on an image sensor , - a photodiode , separate from the heat sink , placed on the path of the unsampled beam at the heat sink and configured to perform, using synchronisation electronics , an autonomous synchronisation configured so as to allow a temporal analysis of pulses to be carried out and an image capture, by the image sensor, to be triggered at a chosen time during the duration of a pulse, said photodiode being further calibrated against the measurements provided by the heat sink in order to perform an absolute measurement of the energy, - a motorisation of the shaping lens able to translate this lens along the axis of the optical path, - a motorisation of the imaging lens able to translate this lens in a plane perpendicular to the axis of the optical path, - a motorisation of the image sensor able to translate this sensor along the axis of the optical path, - electronics for controlling each motorisation, and - the electronics for synchronising the image sensor, which are connected to the photodiode , which are adapted to provide said autonomous synchronisation, - electronics for adjusting the aperture and/or the gain of the image sensor , and - a software interface for parameterising and piloting these controlling, synchronising and adjusting electronics, which is equipped with a unit for processing the images acquired by the sensor . - a shaping lens , - a device for partially sampling the shaped beam, - a heat sink adapted to absorb the unsampled beam and to provide an absolute measurement of the laser energy and power thereof, - an image sensor , - an imaging lens able to form images of the plane on an image sensor , - a photodiode , separate from the heat sink , placed on the path of the unsampled beam at the heat sink and configured to perform, using synchronisation electronics , an autonomous synchronisation configured so as to allow a temporal analysis of pulses to be carried out and an image capture, by the image sensor, to be triggered at a chosen time during the duration of a pulse, said photodiode being further calibrated against the measurements provided by the heat sink in order to perform an absolute measurement of the energy, - a motorisation of the shaping lens able to translate this lens along the axis of the optical path, - a motorisation of the imaging lens able to translate this lens in a plane perpendicular to the axis of the optical path, - a motorisation of the image sensor able to translate this sensor along the axis of the optical path, - electronics for controlling each motorisation, and - the electronics for synchronising the image sensor, which are connected to the photodiode , which are adapted to provide said autonomous synchronisation, - electronics for adjusting the aperture and/or the gain of the image sensor , and - a software interface for parameterising and piloting these controlling, synchronising and adjusting electronics, which is equipped with a unit for processing the images acquired by the sensor . <EOS>