Patent ID: 7688493
Filing Date: 2010-03-30
Classification: B23K,H01S

Abstract:
1. Apparatus for temporally shaping an optical pulse to provide a temporally shaped optical pulse, comprising: first and second wavelength-dispersive optical devices; first and second optical devices having positive optical power each thereof having a focal length and being located between said first and second wavelength-dispersive optical devices; a transmissive spatial-light-modulator located between said first and second positive-optical-power optical devices; said first wavelength-dispersive optical device being arranged to disperse the optical pulse into a diverging fan of rays corresponding to spectral-components of the pulse; said first positive-optical-power optical device arranged to collimate said fan of spectral-component rays; said spatial-light-modulator arranged to selectively modulate said collimated spectral-component rays; and said second positive-optical-power optical device arranged to focus said fan of selectively modulated spectral-component rays onto said second wavelength dispersive device such that said selectively modulated spectral-component rays are combined thereby to provide the temporally shaped pulse; and wherein said first and second optical positive-optical-power optical devices are spaced apart by a distance significantly less than the sum of the focal lengths thereof.