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. 14, 1987
Filed:
Sep. 21, 1984
Applicant:
Inventors:
Lars H Thylen, Huddinge, SE;
Anders G Djupsjobacka, Solna, SE;
Assignee:
Telefonaktiebolaget LM Ericsson, Stockholm, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
332-751 ; 350 9614 ; 350356 ;
Abstract
A method of increasing the available bandwidth of a high speed modulator in which an optical signal is modulated by a microwave signal (v) along an interaction distance (L). After passing half the interaction distance (L/2) the modulating signal is pole reversed by a positive (+E) and a negative (-E) bias voltage being connected to two different sections of the interaction distance. An apparatus according the method in an optical directional coupler modulator is described.