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. 06, 1995
Filed:
May. 13, 1994
Richard Wyatt, Suffolk, GB;
Jonathan R Armitage, Suffolk, GB;
British Telecommunications public limited company, London, GB;
Abstract
A high power monomode laser arrangement is able to manipulate the output from a high power laser diode array pump source 3 using a computer-generated hologram 4 to launch a high proportion of the pump source light into a multimode fiber portion including in input reflector 6. A monomode fiber portion 2 with the same fundamental-mode spot size as the multimode fiber portion 1 is optically coupled to the multimode fiber portion and includes a reflector 5 which reflects only the fundamental mode of the multimode and monomode fiber portions. The fundamental mode reflection forced by the monomode fiber portion 2 provides the feedback necessary to force predominantly fundamental mode oscillation which enables stimulated emission in only the fundamental mode.