EP 1428052 A4 20041208 - FREE-SPACE OPTICAL SYSTEMS FOR WAVELENGTH SWITCHING AND SPECTRAL MONITORING APPLICATIONS
Title (en)
FREE-SPACE OPTICAL SYSTEMS FOR WAVELENGTH SWITCHING AND SPECTRAL MONITORING APPLICATIONS
Title (de)
OPTISCHE FREIRAUMSYSTEME FÜR WELLENLÄNGENVERMITTLUNGS- UND SPEKTRALE ÜBERWACHUNGSANWENDUNGEN
Title (fr)
SYSTEMES OPTIQUES DANS L'ESPACE LIBRE POUR COMMUTATION LAMBDA ET APPLICATIONS DE SURVEILLANCE DU SPECTRE
Publication
Application
Priority
- US 0230013 W 20020919
- US 96156501 A 20010920
- US 99277801 A 20011114
- US 2230301 A 20011214
Abstract (en)
[origin: WO03025630A2] This invention provides a novel method and apparatus which use a wavelength-dispersing means such as a diffraction grating to spatially separate a multi-wavelength optical signal along with a reference signal by wavelength into multiple spectral channels and a reference spectral component in a spectral array with a predetermined relative alignment. By aligning the reference spectral component at a predetermined location, the spectral channels simultaneously impinge onto designated locations, e.g., on an array of beam-receiving elements positioned in accordance with the spectral array. The reference spectral component may be further maintained at the predetermined location by way of servo-control, thereby ensuring that the spectral channels stay aligned at the designated locations. The present invention can be used to construct a new line of servo-based optical systems, including spectral power monitors and optical multiplexers/demultiplexers, for WDM optical networking applications.
IPC 1-7
IPC 8 full level
G01J 3/02 (2006.01); G01J 3/14 (2006.01); G01J 3/18 (2006.01); G01J 3/28 (2006.01); G01J 3/36 (2006.01); G01J 3/433 (2006.01); G01J 3/447 (2006.01); G02B 5/18 (2006.01); G02B 5/30 (2006.01); G02F 1/13 (2006.01)
CPC (source: EP)
G01J 3/2803 (2013.01); G01J 3/447 (2013.01); G01J 3/0224 (2013.01); G01J 2003/2866 (2013.01)
Citation (search report)
- [A] US 5777733 A 19980707 - RADZIUK BERNHARD [DE]
- [A] US 4692883 A 19870908 - NELSON MICHAEL R [US], et al
- See references of WO 03025630A2
Citation (examination)
JP S59170815 A 19840927 - HITACHI LTD
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03025630 A2 20030327; WO 03025630 A3 20030731; CA 2460975 A1 20030327; CA 2460975 C 20100810; CN 1610850 A 20050427; CN 1610850 B 20100428; EP 1428052 A2 20040616; EP 1428052 A4 20041208; JP 2005527784 A 20050915; JP 4223951 B2 20090212
DOCDB simple family (application)
US 0230013 W 20020919; CA 2460975 A 20020919; CN 02823085 A 20020919; EP 02766333 A 20020919; JP 2003529205 A 20020919