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:
May. 05, 1992
Filed:
Sep. 19, 1990
Applicant:
Inventors:
Alistair N Coles, Bath, GB;
David G Cunningham, Wickwar, GB;
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H01S / ; H04B / ;
U.S. Cl.
CPC ...
359333 ; 359175 ; 359191 ; 359244 ; 359344 ; 372-8 ; 372 26 ;
Abstract
An optical mixer is provided for up/down-converting a first intensity-modulated optical signal (S1), the mixer comprising an optical amplifier (20) and gain-modulating means (23) for modulating the gain of the optical amplifier. The gain-modulating means (23) comprises means for generating a second intensity-modulated optical signal (S2) and launching it into the optical amplifier (20) at an intensity to cause the amplifier to operate at least partially within its saturated gain region. This causes the gain of the amplifier to be modulated at the frequency of modulation of the second optical signal (S2).