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:
Aug. 06, 2002
Filed:
Feb. 22, 2000
Abstract
The integrated-optical chemical and/or biochemical sensor comprises a resonant waveguide grating structure ( , . . . ), e.g., a chirped grating. By illumination with incident light ( ), a resonant electromagnetic field is excited in the grating structure ( , . . . ). At least one parameter of the incident light, e.g., the angle of incidence (&thgr; ) or the wavelength (&lgr; ), is varied. Light ( ) excident from the grating structure ( , . . . ) is detected by detectors ( , . . . ). Optionally, means for providing a feedback from the detectors ( , . . . ) to the light sources may be provided, thus establishing a controlled closed-loop system. Hence independent simultaneous measurements in a multiple arrangement of such sensors (S , S , . . . ) is made possible. Moreover, a much higher density of sensors (S , S , . . . ) results.