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. 07, 2000
Filed:
Jun. 30, 1998
Dick Ang, Glendale, AZ (US);
Timothy L Spicer, Phoenix, AZ (US);
Honeywell, Inc., Morristown, NJ (US);
Abstract
A fiber light source having, for instance, a 980 nm pump laser for pumping an erbium-doped optical fiber via a 980/1550 nm WDM coupler. The pumped fiber emits 1550 nm light. A portion of the 1550 nm light goes to a filter via the WDM coupler. The filter shapes the spectrum of the 1550 nm light. The filter is a passive device that may be made from erbium-doped fiber. From the filter the 1550 nm light goes through an isolator or a circulator on to an optical device for which the light is specially made. Such device may be an fiber optic gyroscope. By adding a narrowband optical fiber grating at the output of the pump laser to tune its output, the fiber light source is further improved in stability under variations of ambient temperature and light source drive current.