Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1989-11-03
1992-05-05
Laroche, Eugene R.
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
359240, 359245, 359252, 505848, 505828, 505702, H01B 1200, G02F 101, G01K 700, H01P 111
Patent
active
051107929
ABSTRACT:
An optical modulation method and apparatus uses superconductive oxide material for the optical modulation element. The current, magnetic field, temperature or pressure applied to the superconductive oxide material is varied so as to induce a superconduction-normalconduction transition, and the resulting variation in optical characteristics such as the reflectivity, transmissivity or refractive index of the superconductive oxide material modulate the input light. The method and apparatus are fast in operation and simple in structure. The method and apparatus also detect the variation in the current, magnetic field, temperature or pressure as a change in the reflectivity, transmissivity or refractive index of the superconductive oxide material on the basis of a superconduction-normalconduction transition.
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Fuyama Moriaki
Koyanagi Hiroaki
Minemura Hiroyuki
Nakayama Takahiro
Sato Yoshio
Hitachi , Ltd.
LaRoche Eugene R.
Lester Evelyn A.
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