公开(公告)号：AU2254997A

公开(公告)日：1997-09-10

申请号：AU2254997

申请日：1997-02-11

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA A

IPC: G02B6/293 ,  G02B6/12 ,  G02B6/34 ,  G02B27/14 ,  G02F1/21 ,  H04B10/27 ,  H04B10/29 ,  H04B10/67 ,  H04J14/00 ,  H04J14/02

Abstract: Optical signals are dispersed according to their wavelength by an optical path length difference generator that couples a single pathway conveying a plurality of different wavelength signals to multiple pathways separately conveying the different wavelength signals. The optical path length generator can be formed by a reflective stack having a plurality of partially reflective surfaces for reflecting successive portions of the energy of each of the different wavelength signals along different length optical paths.

公开(公告)号：EP0879433A4

公开(公告)日：1999-10-27

申请号：EP97904105

申请日：1997-02-03

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA A

IPC: G02B5/28 ,  G02B6/00 ,  G02B6/26 ,  G02B6/293 ,  G02B6/34 ,  G02B6/24

CPC classification number: G02B5/285 ,  G02B6/29346 ,  G02B6/29358 ,  G02B6/2937

Abstract: An interference filter (10, 30, 50, 70, 90, 110, 130, 150, or 190) filters selected wavelengths by dividing an input beam into two or more intermediate beams having different optical path lengths and by recombining the intermediate beams into an output beam that is modified by interference between the intermediate beams. An optical path length difference generator (20, 40, 60, 80, 100, 120, 140, 160, or 200) varies the optical path lengths of the intermediate beams by changing the physical lengths of their paths or the refractive indices of the mediums in which they are conveyed. The optical path length generator (20) of one exemplary embodiment (10) includes a spacer plate (20) that is divided into solid optical elements (22 and 24) having different refractive indices for varying the optical path lengths of the intermediate beams. Another optical path length difference generator (140) is formed by a stack of partially reflective surfaces (144) that are spaced apart in the direction of beam propagation by at least one nominal wavelength for varying the physical path lengths between the intermediate beams.

公开(公告)号：EP0873533A4

公开(公告)日：1999-04-21

申请号：EP97902828

申请日：1997-01-06

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA A

IPC: G02B6/28 ,  G02B6/12 ,  G02B6/293 ,  G02B6/34

CPC classification number: G02B6/12011 ,  G02B6/12014

Abstract: Wavelength dispersion in an optical demultiplexer (10) is accomplished by varying propagation constants of a central pathway (16) traverse to the direction of wavefront propagation through the central pathway (16). The propagation constant can be varied by changing the dimensions or refractive qualities of the central pathway, which can be formed as a common waveguide (36) or as plurality of individual waveguides (16).

公开(公告)号：EP0823160A4

公开(公告)日：1998-07-01

申请号：EP97905724

申请日：1997-02-11

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA A

IPC: G02B6/293 ,  G02B6/12 ,  G02B6/34 ,  G02B27/14 ,  G02F1/21 ,  H04B10/02 ,  H04J14/00 ,  H04J14/02

CPC classification number: G02B6/2938 ,  G02B6/12007 ,  G02B6/29361 ,  G02B6/29362 ,  G02B6/29395 ,  G02B27/1073 ,  G02B27/145 ,  G02B27/148 ,  G02F1/21 ,  H04J14/02

Abstract: Optical signals are dispersed according to their wavelength by an optical path length difference generator (26) that couples a single pathway (12) conveying a plurality of different wavelength signals to multiple pathways (52, 54, 56, 58) separately conveying the different wavelength signals. The optical path length generator (26) can be formed by a reflective stack having a plurality of partially reflective surfaces for reflecting successive portions of the energy of each of the different wavelength signals along different length optical paths.