Global Patent Index - EP 1485976 A2

EP 1485976 A2 2004-12-15 - ABSOLUTELY CALIBRATED PERIODIC FILTERS AND SOURCES

Title (en)

ABSOLUTELY CALIBRATED PERIODIC FILTERS AND SOURCES

Title (de)

ABSOLUT KALIBRIERTE PERIODISCHE FILTER UND QUELLEN

Title (fr)

SOURCES ET FILTRES PERIODIQUES A ETALONNAGE ABSOLU

Publication

EP 1485976 A2 (EN)

Application

EP 03707971 A

Priority

  • CA 0300378 W
  • CA 2411792 A
  • US 36474202 P
  • US 29300402 A

Abstract (en)

[origin: WO03079504A2] A method and a system for filtering a user light beam using a periodic filter having a frequency response stabilized at an absolutely calibrated value are provided. A primary light beam is generated by a tunable laser source and portions thereof are filtered by an absolute reference filter and the periodic filter. First the frequency of the laser source is automatically locked on the absolute reference filter, and then the frequency response of the periodic filter is locked relative to the frequency of the laser source. The frequency response of the periodic filter is therefore continuously maintained at the proper calibration. User input and output are provided to pass the user light beam through the stabilized periodic filter independently of the filter stabilization process. A broadband absolutely calibrated optical source and a method for absolutely calibrating an optical spectrum analysis device are also provided.

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

H01S 5/0687

IPC 8 full level (invention and additional information)

H04B 10/50 (2013.01); H04B 10/572 (2013.01); G01J 3/26 (2006.01); G01J 3/28 (2006.01); G02B 6/12 (2006.01); G02B 6/42 (2006.01)

CPC (invention and additional information)

H04B 10/572 (2013.01); H04B 10/504 (2013.01); G01J 3/26 (2013.01); G01J 2003/2866 (2013.01); G02B 6/4202 (2013.01); G02B 2006/1215 (2013.01)

Citation (search report)

See references of WO 03079504A3

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

DOCDB simple family

WO 03079504 A2 20030925; WO 03079504 A3 20040219; AU 2003212159 A1 20030929; EP 1485976 A2 20041215