Laser pulse shaper
First Claim
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1. Pulse shaping apparatus, comprising:
- a source of input laser pulses;
means for spatially dispersing frequency components of each of said pulses;
means for collimating the dispersed frequency components to produce collimated frequency components;
an acousto-optic modulator (AOM) positioned in the paths of the collimated frequency components;
means including a transducer for applying modulated radio frequency voltage waves to said acousto-optic modulator;
means for focussing the collimated frequency components after they have passed through the acousto-optic modulator; and
means for forming shaped pulses of light from the focussed collimated frequency components.
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Abstract
The frequency components of an input pulse are dispersed into divergent respective rays that are applied to an acousto-optic modulator after being collimated. The amplitude of each frequency component emerging from the modulator is determined by the amplitude and phase of a grating formed therein by modulated radio frequency wave applied to it. The parallel rays emerging from the modulator are focussed onto a device for forming an output pulse.
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Citations
12 Claims
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1. Pulse shaping apparatus, comprising:
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a source of input laser pulses; means for spatially dispersing frequency components of each of said pulses; means for collimating the dispersed frequency components to produce collimated frequency components; an acousto-optic modulator (AOM) positioned in the paths of the collimated frequency components; means including a transducer for applying modulated radio frequency voltage waves to said acousto-optic modulator; means for focussing the collimated frequency components after they have passed through the acousto-optic modulator; and means for forming shaped pulses of light from the focussed collimated frequency components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for shaping laser pulses comprising the steps of:
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spatially dispersing frequency components of said pulses; collimating the frequency components to produce collimated frequency components; directing the respective collimated frequency components onto a crystal that diffracts portions of the respective collimated frequency components depending on their amplitude and phase; focussing the collimated frequency components that pass through the crystal; and forming shaped laser pulses from the focussed frequency components.
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Specification