Magnetically enhanced radiation source

Optical: systems and elements – Optical frequency converter

Reexamination Certificate

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Reexamination Certificate

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06958853

ABSTRACT:
A radiation source comprising a frequency conversion member (1) configured to emit a beam of emitted radiation (7) with at least one frequency in the range from 0.1 THz to 100 THz, in response to irradiation with an input beam (3) with a frequency different to that of the emitted radiation (7), the source being subjected to a magnetic field (9) which has a component parallel to that of the emitted beam of radiation (7). The radiation source may be optimised by using both the fluence of the input beam and the magnetic field or may comprise a magnetically doped frequency conversion member or also have means for applying an electric field.

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P. Gu, et al., “Magnetic Field Dependence of THz Radiation From InSb Surface”,Technical Digest, Summaries of Papers Presented at the Conference on Lasers and Electro-Optics, Postconference Edition, Cleo '99, Conference on Lasers and Electro-Optics (IEEE Cat. No. 99CH37013), pp. 372-373.
N. Sarukura, et al., “High Average-Power THz Radiation From Femtosecond Laser-Irradiated InAs in a Magnetic Field and its Elliptical Polarization Characteristics”,Journal of Applied Physics, Jul. 1, 1998, AIP, USA, vol. 84, No. 1, pp. 654-656.
P.K. Benicewicz, et al., “Scaling of Terahertz Radiation from Large-Aperture Biased InP Photoconductors”,Optics Letters, Aug. 15, 1993, U.S.A., vol. 18, No. 16, pp. 1332-1334.
X.C. Zhang, “Magnetic Switching of THz Beams”,Applied Physics Letters, U.S., American Institute of Physics, New York, vol. 62, No. 17, Apr. 26, 1993, pp. 2003-2005.

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