Multiple-stage optical Kerr gate system

Details Multiple-stage optical Kerr gate system Multiple-stage optical Kerr gate system

1991-10-30

1993-07-13

Lerner, Martin

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359259, 372700, G02F 103, H01S 311

Patent

active

052279120

ABSTRACT:
A multiple-stage optical Kerr gate system for gating a probe pulse of light. In a first embodiment, the system includes at least two optical Kerr gates, each Kerr gate including a polarizer, an optical Kerr cell actuable by a pump pulse, and an analyzer. In a second embodiment, at least one of the Kerr cells may be eliminated by arranging the respective sets of polarizers and analyzers so that they share a common Kerr cell. Gated pulses obtained using the present system typically have a signal to noise ratio that is at least 500 times better than that for gated pulses obtained using a single optical Kerr gate system. The system of the present invention may also include means for causing the pump pulse to arrive at the second Kerr cell (in the case of the first embodiment) or at a single Kerr cell a second time (in the case of the second embodiment) non-synchronously with the arrival of the probe pulse thereat. In this manner, gated pulses may be obtained that are much shorter in duration than pulses gated with a single optical Kerr gate system.

REFERENCES:
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Bloom et al., "Sub-Picosecond Optical Gating by Optical Wavefront Conjugation", Conference on Picosecond Phenomena, Hilton Head, S.C., May 24 to 26, 1978, pp. 96-98.
Boiko et al., "Low-Loss and High-Contrast Kerr Shutters", Soviet Physics--Lebedev Institute Rep., No. 11, 1977, pp. 1 to 5.
Herriott et al., "Folded Optical Delay Lines", Applied Optics, vol. 4, No. 8, Aug. 1965, pp. 883 to 889.

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