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:
Jun. 27, 2000
Filed:
Jun. 18, 1998
Jorg Hehmann, Nurnberg, DE;
Alcatel, Paris, FR;
Abstract
The invention relates to an optical isolator of the type commonly employed in fiber-optic data transmission and amplifier systems. The optical isolator of the invention has a support (TR) which is provided with a recess (A). Two wedge-shaped plates (KP1, KP2) made of an optically birefringent material and a Faraday rotator (FR) are inserted in this recess (A). Preferably, the support (TR) is a silicon crystal in which a very precise recess (A) can be formed by wet-chemical etching. The individual components are passively adjusted in the recess by stops. The optical isolator of the invention therefore consists only of those components which are absolutely essential for its operation. Also provided is an advantageous wavelength multiplexer module with an integrated optical isolator. The construction of the wavelength multiplexer module is very simple and requires only two spherical lenses as imaging elements for three optical inputs/outputs.