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:
Apr. 22, 2014
Filed:
Dec. 13, 2010
Lina He, St. Louis, MO (US);
Jiangang Zhu, St. Louis, MO (US);
Sahin Kaya Ozdemir, St. Louis, MO (US);
Lan Yang, St. Louis, MO (US);
Da-ren Chen, St. Louis, MO (US);
Lina He, St. Louis, MO (US);
Jiangang Zhu, St. Louis, MO (US);
Sahin Kaya Ozdemir, St. Louis, MO (US);
Lan Yang, St. Louis, MO (US);
Da-Ren Chen, St. Louis, MO (US);
Washington University, St. Louis, MO (US);
Abstract
Detection of individual objects using a light source and a whispering gallery mode (WGM) resonator. Light from the whispering gallery mode (WGM) resonator is analyzed. The presence of an object is determined based on mode splitting associated with the light received by the photodetector. For example, the presence of the object may be determined based on the distance between two whispering gallery modes and/or the linewidths of the two modes in a transmission spectrum. Alternatively, the presence of the object may be determined based on a beat frequency that is determined based on a heterodyne beat signal produced by combining split laser modes in the received light from a WGM microcavity laser.