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:
Nov. 22, 2011
Filed:
Nov. 30, 2007
Bernd Sartorius, Berlin, DE;
Michael Feiginov, Darmstadt, DE;
Cezary Sydlo, Floersheim, DE;
Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V., Munich, DE;
Technische Universitaet Darmstadt, Darmstadt, DE;
Abstract
An inexpensive and compact arrangement for the electrical control and fast modulation of THz transmitters and THz measuring systems is proposed, wherein said arrangement is stable, requires no mechanical movements and operates with a purely electric control, consumes little power and also has a high speed potential for the phase modulation. This is achieved by replacing the components known from the state of the art, namely two lasers, the beam splitters, the couplers and the mechanically moved delay line, with a compact monolithic or hybrid integrated chip (), particularly a so-called optical master chip without moving parts that comprises at least the two lasers (), the beam splitters (S, S), the couplers (K, K) and a phase modulator () for one of the laser waves such that the two generated beat signals are respectively delivered to different chip outputs () in order to separately control the THz transmitter and the local oscillator.