Patent ID: 8520297

Claim:
A spectrum shaping scheme for chirped pulse amplification (CPA): of which the features are the comprising: a spectrum decomposing system with Czerny-Turner Spectroscope Instrument (CTSI) construction, and a spectrum synthesizing system with CTSI structure that is symmetrical to the decomposing structure; in addition, a spectrum shaping system including an aperture and a planar reflector for spectrum shaping function design; of which the features are the processing: firstly decomposing the spectrum of a chirped temporal pulse laser to a spectral domain plane; then shaping the spectrum in the spectral domain; finally synthesizing un-shiftily this shaped spectrum in the spectral domain into a temporal chirped pulse with a designed shape; of which the features are the optical path order: a laser beam from the front-end system of a CPA system passes through the first concave reflector ( 1 ), where it is transformed into a parallel light; then via the first aperture ( 6 ), and the second concave reflector ( 2 ), the first grating ( 3 ), the third concave reflector ( 4 ) and the second aperture ( 10 ), which constitute a spectrum decomposing system with CTSI construction and accomplish the collimation, the dispersion, and the imaging function; then it passes through the second aperture ( 10 ) and the planar reflector for spectrum shaping function design ( 5 ) that is at the same place with the second aperture, which accomplish the spectral shaping function in the spectral domain; after that, it passes through the fourth concave reflector ( 4 ′), the second grating ( 3 ′), the fifth concave reflector( 2 ′) and the third aperture ( 6 ′), which constitute a spectrum synthesizing system with CTSI construction and accomplish the imaging, the dispersion cancelling, and the synthesizing function; finally it passes through the third aperture ( 6 ′) ejecting out after chirped pulse spectrum decomposing, modulation, and synthesizing; then via the sixth concave reflector ( 1 ′), it is transformed into a parallel light again, and sent into the following stage such as the solid-state amplifier for amplification.