Optical Fiber

Timo Aalto (Inventor)

Research output: PatentPatent


The present invention concerns an optical fiber acting as a slab-coupled waveguide. The optical fiber has a cross-section comprising a core ( 1 ), which is two dimensional and responsible for the horizontal confinement of the fiber's fundamental mode. A slab ( 2 ) is placed in the vicinity of the core ( 1 ). The slab ( 2 ) extends substantially in a plane, acts as a mode sink for the core, and is at least three times wider than the core ( 1 ). A cladding ( 3 ) surrounds the core ( 1 ) and the slab ( 2 ). The cladding ( 3 ) is made of one or several materials with refractive indices lower than the core and slab materials. The core ( 1 ), slab ( 2 ) and cladding ( 3 ) and any other protective or supportive structures attached to them form an overall structure that determines the mechanical properties of the fiber. The cross-section of the fiber is formed to make the fiber significantly more flexible in the direction perpendicular to the plane of the slab than in the plane of the slab.

Patent family as of 31.8.2021

CA2571142 AA 20061218 CA20042571142 20040709      
EP1766448 A1 20070328 EP20040742187 20040709      
US2007297738 AA 20071227 US20040630320 20040709      
US7519251 BB 20090414 US20040630320 20040709      
WO06005787 A1 20060119 WO2004FI00444 20040709

Link to current patent family on right 

Original languageEnglish
Patent numberUS2007297738
IPCG02B 6/ 24 A I
Priority date9/07/04
Publication statusPublished - 27 Dec 2007
MoE publication typeH1 Granted patent


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