Global Patent Index - EP 1002248 A1

EP 1002248 A1 2000-05-24 - GRATING ASSISTED COUPLER DEVICES

Title (en)

GRATING ASSISTED COUPLER DEVICES

Title (de)

KOPPLERBAUELEMENTE MIT GITTERN

Title (fr)

DISPOSITIFS DE COUPLAGE PAR RESEAU DE DIFFRACTION

Publication

EP 1002248 A1 (EN)

Application

EP 98937997 A

Priority

  • US 9815328 W
  • US 5515797 P

Abstract (en)

[origin: WO9906864A1] An add/drop filter (10) for optical wave energy incorporates a Bragg grating (27) in a very narrow waist region (12) defined by merged lengths of elongated optical fibers (30, 31, 34, 35). Light is propagated into the waist region via adiabatically tapered fibers (20, 21, 24, 25) and is tranformed from two longitudinally adjacent fibers into two orthogonal modes within the air-glass waveguide of the waist and reflected off the grating from one fiber into the other. The geometry of the waist region (12) is such that the reflected drop wavelength is polarization independent, without lossy peaks in the wavelength band of interest. Back reflections are shifted out of the wavelength band of interest. High strength gratings are written by photosensitizing the waist region fibers. Narrow spectral bandwidth gratings are apodized by both a.c. and d.c. variations in writing beams. A coupler device employing these is precisely arranged in a support structure which provides temperature compensation.

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

G02B 6/14; G02B 6/34

IPC 8 full level (invention and additional information)

G02B 6/14 (2006.01); G02B 6/293 (2006.01); G02B 6/34 (2006.01); G02B 6/28 (2006.01)

CPC (invention and additional information)

G02B 6/02138 (2013.01); G02B 6/02114 (2013.01); G02B 6/02085 (2013.01); G02B 6/02109 (2013.01); G02B 6/02152 (2013.01); G02B 6/0218 (2013.01); G02B 6/2835 (2013.01); G02B 6/29334 (2013.01)

Citation (search report)

See references of WO 9906864A1

Designated contracting state (EPC)

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

EPO simple patent family

WO 9906864 A1 19990211; AU 738851 B2 20010927; AU 8661898 A 19990222; CA 2296345 A1 19990211; EP 1002248 A1 20000524; JP 2001512244 A 20010821

INPADOC legal status


2003-11-12 [18W] WITHDRAWN

- Effective date: 20030912

2000-09-06 [RIN1] INVENTOR (CORRECTION)

- Inventor name: KEWITSCH, ANTHONY, S.

2000-09-06 [RIN1] INVENTOR (CORRECTION)

- Inventor name: RAKULJIC, GEORGE

2000-09-06 [RIN1] INVENTOR (CORRECTION)

- Inventor name: TONG, XIAOLIN

2000-09-06 [RIN1] INVENTOR (CORRECTION)

- Inventor name: WILLEMS, PHIL, A.

2000-05-24 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000211

2000-05-24 [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