EP 1327129 A1 20030716 - ANISOTROPIC DISTRIBUTED FEEDBACK FIBER LASER SENSOR
Title (en)
ANISOTROPIC DISTRIBUTED FEEDBACK FIBER LASER SENSOR
Title (de)
ANISOTROPER FASERLASER-SENSOR MIT VERTEILTER RÜCKKOPPLUNG
Title (fr)
DETECTEUR A LASER A FIBRE ANISOTROPE A RETROACTION REPARTIE
Publication
Application
Priority
- EP 01969120 A 20011002
- CH 0100591 W 20011002
- EP 00810965 A 20001018
Abstract (en)
[origin: EP1197738A1] Fiber laser sensor comprises a distributed feedback (DFB) laser having a laser-reinforced fiber (2) with a fiber Bragg grid resonator (3). The fiber has a non-rotation symmetrical structure. An emission wavelength region and fiber parameters are such that the emission wavelength region and a wavelength region, in which at least two different space modes spread, overlap in a spectral region. A grid period of the fiber Bragg grid resonator is selected so that Bragg wavelengths assigned to the space modes lie in the spectral region. Preferred fiber parameters may that the modes are the same or different space modes with linear polarization orthogonal to each other or different space modes with the same linear polarization. The fiber has an elliptical core (2a), a bow-tie structure, a panda structure, a side hole structure, A D-shape structure, an elliptical fiber sleeve (2b) or a partially ground fiber sleeve, or is a micro-structured fiber with a rotation symmetrical structure.
IPC 1-7
IPC 8 full level
G01L 11/02 (2006.01)
CPC (source: EP US)
G01L 11/025 (2013.01 - EP US)
Citation (search report)
See references of WO 0233374A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1197738 A1 20020417; AU 8946701 A 20020429; BR 0114748 A 20031223; EP 1327129 A1 20030716; NO 20031747 D0 20030415; NO 20031747 L 20030617; NO 328179 B1 20091228; US 2004093950 A1 20040520; US 6885784 B2 20050426; WO 0233374 A1 20020425
DOCDB simple family (application)
EP 00810965 A 20001018; AU 8946701 A 20011002; BR 0114748 A 20011002; CH 0100591 W 20011002; EP 01969120 A 20011002; NO 20031747 A 20030415; US 39913403 A 20030414