Light track observing device

Details Light track observing device Light track observing device

2006-05-16

2006-05-16

Turner, Samuel A. (Department: 2877)

Optics: measuring and testing

By light interference

C356S491000

Reexamination Certificate

active

07046365

ABSTRACT:
A light pulse from an ultrashort pulse light source11is split by a beam splitter12and guided, to a detection medium4, as an excitation pulse and probe pulse having respective predetermined linearly polarized states by an excitation optical system2and probe optical system3, respectively. A light track region which is generated in the detection medium4by incidence of the excitation pulse, and in which the refractive index is changed by a nonlinear optical effect, is irradiated with the probe pulse. Of components which have passed through the detection medium4, a probe pulse component whose polarized state has changed through the light track region is detected by a camera53via an analyzer51in a photodetection part5. This realizes a light track observation apparatus capable of directly observing the light track of an excitation pulse.

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Borghesi, M., et al., “Large Quasistatic Magnetic Fields Generated by a Relativistically Intense Laser Pulse Propagating in a Preionized Plasma,” Physical Review Letters, The American Physical Society, vol. 80, No. 23, Jun. 8, 1998, pps. 5137-5140.

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