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. 30, 2011
Filed:
May. 07, 2008
Applicants:
Yuan-yu Jau, Princeton, NJ (US);
Kiyoshi Ishikawa, Hyogo, JP;
William Happer, Princeton, NJ (US);
Inventors:
Assignee:
Princeton University, Princeton, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04B 47/00 (2006.01); G04F 5/00 (2006.01); G01V 3/00 (2006.01); H03L 7/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A polarization gain medium such as an emitting laser diode provides the optical pumping. An atomic vapor cell is positioned in the laser cavity providing spontaneous push-pull optical pumping inside the laser cavity. This causes the laser beam to be modulated at hyperfine-resonance frequency. A clock signal is obtained from electrical modulation across the laser diode.