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. 21, 2001
Filed:
Dec. 15, 1998
Applicant:
Inventors:
Assignee:
Contraves Space AG, Zurich, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/081 ; G02B 2/728 ;
U.S. Cl.
CPC ...
H01S 3/081 ; G02B 2/728 ;
Abstract
The invention relates to devices for the quantum-optical amplification of modulated light, in particular in optical free-space communications systems. In the process a light beam (,) is conducted through a plurality of adjoining crystals (,), (,), (,), which are delimited from each other by means of polarization-selectively reflecting layers (,), (,). The light beam (,) is repeatedly reflected at the edge areas of the crystals into quarter-wave plates (,), (,), (,), (,), (,), and in the process its polarization is respectively rotated by 90 degrees.