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:
Jul. 26, 1988
Filed:
Dec. 03, 1986
Hans F Mahlein, Unterhaching, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A multiplex-demultiplex module having a laser diode and a strip waveguide leading from said laser diode being disposed on a first surface of a substrate and the waveguide extends to an out-coupling and in-coupling location characterized by a single combined grating being arranged on the first surface of the substrate having its grid lines extending perpendicular to the direction of radiation guided in the waveguide and dimensioned so that it will not influence the laser emissions of a first wavelength from the laser diode but will steer radiation supplied from an in-coupling location and having a second wavelength differing from the first wavelength through the substrate onto a photo diode located under the opposite surface of the substrate. The grating thus acts as both a frequency-selective and a diffracting grating and replaces the two gratings in previously known devices.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile