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:
Aug. 09, 1977
Filed:
Jun. 27, 1975
Charles Andrew Burrus, Jr, Fair Haven, NJ (US);
Julian Stone, Rumson, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
There is disclosed a technique for growing, from a melt, doped single-crystal fibers for use as lasers or other active or passive optical devices of a size that is compatible with proposed optical fiber communications systems. A rod of undoped material has deposited thereon, by mechanical means, a powder or a slurry of a compound of the active ion or other dopant. A melt is formed at the end of the rod with a laser beam and a reduced diameter doped single-crystal fiber is grown or drawn from the melt by pulling with a wire or, when desired crystalline orientation is needed, by pulling with a pointed and oriented seed crystal. The pulling step, at least in the specific case of a neodymium-doped yttrium aluminum garnet (YAG) fiber, is repeated a plurality of times with approximately a 3:1 diameter reduction each time in order to obtain the desired fiber size; but only one deposition of the dopant compound is needed.