Optical modulator of electron beam

Details Optical modulator of electron beam Optical modulator of electron beam

2005-01-14

2010-06-01

Roy, Sikha (Department: 2879)

Electric lamp and discharge devices

Photosensitive

Photocathode

C313S310000, C250S42300F, C250S370110

Reexamination Certificate

active

07728520

ABSTRACT:
An optoelectronic modulator is based on the concentration of an electron beam from an electron gun by a tapered cavity, which sides are photosensitive and change the electrical conductivity under the illumination of light (electromagnetic radiation). The light modulation causes the corresponding changes in the current transported across the walls of the cavity. The remaining part of the electron current exits the cavity aperture and forms an amplitude-modulated divergent electron beam.

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F.V. Hartemann et al., “Coherent Photoelectron Bunch Generation and Quantum Efficiency Enhancement in a Photocathode Optical Resonator,”Appl. Phys. Lett., 65(19), Nov. 7, 1994, pp. 2404-2406.

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