Method of increasing the contrast of a high-intensity laser
AssigneeJapan Atomic Energy Agency
InventorsHiromitsu Kiriyama, Michiaki Mori, Shuji Kondo, Shuhei Kanazawa, Hiroyuki Daido
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Abstract
In the improved method for increasing the contrast of a high-intensity laser, signal light outputted from a laser oscillator, a preamplifier or the like is amplified by OPCPA which is excited by pump light having a short pulse width comparable to that of the signal light, thereby producing an extremely high contrast.
Claims15
A method of increasing the contrast of a high-intensity laser comprising amplifying laser light outputted from a laser oscillator with an optical parametric chirped pulse amplifier as excited by laser light of a short pulse width, whereby the laser light is provided with an extremely high value of contrast which represents the intensity ratio between the pre-pulse as background light and the main pulse, both being contained in the temporal waveform of the laser light.
The method of increasing the contrast of a high-intensity laser according to 3, wherein excitation by pump light of a short pulse width enables efficient amplification by the short length of interaction in the optical parametric chirped pulse amplifier and, at the same time, the short length of interaction enables amplification of a wide spectral band.
Dependencies are inferred from the claim text.