POLARIZATION-INDEPENDENT, DENSE WAVELENGTH DIVISION MULTIPLEXER (DWDM) - Patent 1200861

(19)

(11)

EP 1 200 861 A2

(12)

(88)	Date of publication A3:
	23.08.2001

(43)	Date of publication:
	02.05.2002 Bulletin 2002/18

(21)	Application number: 00975178.5

(22)	Date of filing: 27.07.2000

(51)	International Patent Classification (IPC)⁷: G02B 6/293

(86)	International application number:
	PCT/US0020/489

(87)	International publication number:
	WO 0110/069 (08.02.2001 Gazette 2001/06)

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

29.07.1999 US 146258 P
09.05.2000 US 202598 P

(71)	Applicant: APA OPTICS, INC.
	Blaine, MN 55449 (US)

(72)	Inventors:
	BOORD, Warren, Timothy Brooklyn Park, MN 55443 (US) JAIN, Anil, K. North Oaks, MN 55127 (US) VANDERWERT, Terry North Oaks, Minnesota 55127 (US)

(74)	Representative: Alton, Andrew et al
	Urquhart-Dykes & LordTower HouseMerrion Way Leeds LS2 8PA Leeds LS2 8PA (GB)

(54)	POLARIZATION-INDEPENDENT, DENSE WAVELENGTH DIVISION MULTIPLEXER (DWDM)