Global Patent Index - EP 1257858 A1

EP 1257858 A1 2002-11-20 - WAVELENGTH CONTROLLED FBG FILTER

Title (en)

WAVELENGTH CONTROLLED FBG FILTER

Title (de)

FBG-FILTER MIT WELLENLÄNGENSTEUERUNG

Title (fr)

FILTRE A RESEAU DE BRAGG (FBG) A COMMANDE DE LONGUEUR D'ONDE

Publication

EP 1257858 A1 (EN)

Application

EP 00975017 A

Priority

  • NO 0000377 W
  • NO 995485 A

Abstract (en)

[origin: WO0135138A1] Controlled fiberoptic filtering system comprising at least one tunable FBG filter engraved into a first optical fibre, the FBG filter comprising at least one grating with a chosen wavelength, inscribed in a chosen length of fibre, the grating providing reflections at least two wavelengths, a filter and a sensor wavelength. The system comprises: actuator means coupled to the filter for providing a change in the reflected wavelengths reflected by the grating, e.g. by providing a strain/compression and/or a temperature change to the grating, thus altering the filter wavelength, a light source coupled to the first optic fibre for providing an optic signal at a range of wavelengths comprising the sensor wavelength of the filter, wavelength readout unit coupled to first optic fibre for measuring the wavelength of optical signals reflected from the grating within the sensor wavelength, and control means coupled to the output of said wavelength readout unit and to said actuator means for positioning the reflected wavelengths or controlling the change in the wavelengths reflected from the grating, as provided by the actuator, and thus simultaneously the position or change in the filter wavelength.

IPC 1-7 (main, further and additional classification)

G02B 6/293

IPC 8 full level (invention and additional information)

G02B 6/34 (2006.01); H04J 14/02 (2006.01)

CPC (invention and additional information)

G02B 6/2932 (2013.01); G02B 6/29383 (2013.01); H04J 14/021 (2013.01); G02B 6/02195 (2013.01)

Citation (search report)

See references of WO 0135138A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

WO 0135138 A1 20010517; AU 1312501 A 20010606; EP 1257858 A1 20021120; NO 313606 B1 20021028; NO 995485 A 20010510; NO 995485 D0 19991109

INPADOC legal status


2013-11-13 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20130601

2006-11-02 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20060928

2002-11-20 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020423

2002-11-20 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-11-20 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI