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. 06, 2012
Filed:
Dec. 28, 2007
Josep Prat Gomà, Barcelona, ES;
Josep Maria Fàbrega Sànchez, Barcelona, ES;
Josep Prat Gomà, Barcelona, ES;
Josep Maria Fàbrega Sànchez, Barcelona, ES;
Universitat Politecnica de Catalunya, Barcelona, ES;
Abstract
A receiver including a fiber optic first input element, through which a signal carrying information circulates, a local laser block, a photo-detection block, and a block of differential demodulation is disclosed. The information-carrying signal of the optical fiber input and the beam of light generated by the local laser block provided in the receiver are coupled and detected in a block of optical detection, which converts the optical signal that carries information into an electrical signal that carries information, which is processed in a block of electrical demodulation, which performs a differential demodulation of its in-phase and quadrature components, combining them later. An optical receiver is obtained, featuring optical homodyne detection, being coincident the wavelengths of the input signal and the tuned beam of light, with a high tolerance to the phase noise, generated by the optical communications lasers, and with no need to use an optical phase-locked loop.