The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 2001
Filed:
May. 14, 1996
Applicant:
Inventors:
Albert P. Heberle, Cambridge, GB;
Jeremy J. Baumberg, Cambridge, GB;
Assignee:
Hitachi Europe Limited, Berkshire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/03 ;
U.S. Cl.
CPC ...
G02F 1/03 ;
Abstract
Optically generated charge carriers in an optically responsive medium, such as an optical switch, which are produced in response to a first pulse of optical radiation (P,), are de-excited by directing a second pulse (P,) of optical radiation into the medium. The second pulse occurs while the excitation produced by the first pulse remains coherent, and the relative phase of the first and second pulses is selected so that the second pulse destructively interferes with the excitation produced by the first pulse. The apparatus may be used as an optical switch or as a photodetector.