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. 27, 2001
Filed:
Apr. 03, 2000
Seiji Nogiwa, Tokyo, JP;
Ando Electric Co., Ltd., Tokyo, JP;
Abstract
The object of the invention is to offer a light source device for frequency division multiplexed optical communications having a compact size and reduced cost. Light source units,output light having optical frequencies which oscillate at mutually different modulation frequencies centered about mutually different optical frequencies. Optical splitters,split the output light from each light source unit into two parts. An optical multiplexer-splitter,multiplexes and splits the output light from the optical splitters. The Fabry-Perot etalon resonator,transmits each component of the output light from the optical multiplexer-splitter,at a specific transmission rate corresponding to each optical frequency. A light receiving element,converts the output light from the Fabry-Perot etalon resonator,into an electrical signal, and a light receiving element,converts the output light from the optical multiplexer-splitter,into an electrical signal. A transmission change sensing unit,is provided for each light source unit, and senses the change in transmission of the Fabry-Perot etalon resonator at the optical frequency of the corresponding light source unit. A CPU,controls each light source unit by feedback such as to maximize the output of each transmission change sensing unit.