Patent ID: 6826209
Filing Date: 2004-11-30
Classification: H01S

Abstract:
An ultra-broadband, variable and multiple wavelength, pulse waveform shaping apparatus, comprising:an ultra-broadband light pulse producing means for receiving a fundamental wave light pulse having a bandwidth and broadening the bandwidth of said fundamental wave light pulse into an ultra-broadband range to produce an ultra-broadband light pulse in the form of a beam; a beam expander means comprising a cylindrical lens for expanding a cross section of said beam of ultra-broad band light pulse in a y-axis to form an expanded beam of ultra-broadband light pulse and a diffraction grating for dispersing wavelengths of the ultra-broadband light pulse of said expanded beam in an x-axis orthogonal to the y-axis to produce a beam of ultra-broadband light pulse with its cross section thus expanded two-dimensionally; a two-dimensional spatial amplitude modulator for applying amplitude modulation to said two-dimensionally expanded ultra-broadband light pulse wherein each, independent of one another, form a plurality of independent rows y1, y2, y3, y4 â€¢ â€¢ each extending along the the x-axis of such wavelength dispersion to take out light pulse components having mutually independent center wavelengths &lgr;1, &lgr;2, &lgr;3, &lgr;4 â€¢ â€¢ each corresponding to each of the plurality of independent rows; a two-dimensional spatial phase modulator for applying phase modulation to said light pulse components having their mutually independent center wavelengths &lgr;1, &lgr;2, &lgr;3, and &lgr;4 â€¢ â€¢ for each of said plurality of rows, independent of one another; and a beam reducing and waveform shaping means comprising a cylindrical lens or a cylindrical mirror and a diffraction grating or a prism for reducing, and condensing into a direction along said x-axis, said light pulse components modulated by said two-dimensional spatial amplitude modulator and said two-dimensional spatial phase modulator, whereby a plurality of pulses shaped in waveform and controlled in amplitude and phase independently for each of said center wavelengths are ensue to be display at different positions on an output screen.