Shaping optical pulses by amplitude and phase masking

Details Shaping optical pulses by amplitude and phase masking Shaping optical pulses by amplitude and phase masking

1985-04-09

1987-04-07

Arnold, Bruce Y.

350 9611, G02B 2746, G02B 612

Patent

active

046555471

ABSTRACT:
Embodiments of the present invention control, manipulate and tailor the shape of input optical pulses to produce substantially transform-limited output pulses which can be shorter than the input pulses.
In embodiments of a first aspect of the present invention an input optical pulse is chirped, the chirped pulse is then passed through an optical component that spatially disperses the frequency components of the chirped pulse and partially compensates the chirp, the spatially dispersed frequency components are then passed through spatial amplitude and/or phase masks that control and/or adjust the amplitude and/or phase of the frequency components, and, finally, the masked components are passed through the first or a second optical component that returns the masked, spatially dispersed frequency components substantially to the spatial distribution of the input pulse while substantially completing the compensation of the chirp to form an output pulse.

REFERENCES:
IEEE J. Quantum Electronics, vol. QE-9, No. 2, Feb. 1973, pp. 213-217, "A New Approach to Picosecond Laser Pulse Analysis Shaping and Coding" by Jean Desbois, Francois Gires, and Pierre Tournois.
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Applied Physics Letters, vol. 44(8), Apr. 15, 1984, pp.729-731 "80x Single-Stage Compression of Frequency Doubled Nd:Yttrium Aluminum Garnet Laser Pulses" by A. M. Johnson, R. H. Stolen and W. M. Simpson.
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Proceedings of the Fourth International Conference, Ultrafast Phenomena IV, Monterey, Calif., Jun. 11-15, 1984, Editors: D. H. Auston and K. B. Eisenthal, published by Springer-Verlas, 1984, pp.7-10, "Solution Shaping Mechanisms in Passively Mode-Locked Lasers and Negative Group Velocity Dispersion Using Refraction" by O. E. Martinez, J. P. Gordon and R. L. Fork.

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