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. 29, 1999
Filed:
Oct. 21, 1997
Applicant:
Inventors:
Piero Gambini, Turin, IT;
Mario Puleo, Borgosesia, IT;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
359158 ; 359161 ; 359177 ; 359140 ; 359110 ; 359187 ; 359183 ; 359173 ; 359132 ; 359153 ;
Abstract
The signal to be controlled is sent along an optical fiber by a wavelength tunable laser whose emission wavelength may be varied as a function of a possible phase variation in the received signal with respect to a reference phase. At the receiving end of the fiber a control signal is generated by extracting a fraction of the power associated with the received signal and sending such fraction back towards the transmitting end, and at the transmitting end the phase of the fraction is compared with that of the original signal and the tunable laser is driven in such a way as to transmit a wavelength such that the clock information reaches the receiving end with the reference phase.