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. 18, 2002
Filed:
Apr. 04, 2000
Applicant:
Inventors:
Christopher Richard Doerr, Middletown, NJ (US);
Lawrence Warren Stulz, Neptune, NJ (US);
Assignee:
Agere Systems Guardian Corp., Orlando, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/035 ;
U.S. Cl.
CPC ...
G02F 1/035 ;
Abstract
A planar lightguide circuit (PLC) phase shifter is fabricated on a chip which exhibits reduced thermal crosstalk by reducing the thermal resistance between the waveguide cores and the thermal “ground” (e.g., a heat sink) compared to the thermal resistance between the waveguide cores. This is accomplished by removing some of the glass from the backside of the chip over a small area under the phase shifters, depositing metal on the backside, and soldering it to a copper block heat sink.