Optical device

Details Optical device Optical device

2005-05-03

2005-05-03

Kim, Ellen E. (Department: 2874)

Optical waveguides

Planar optical waveguide

C385S122000

Reexamination Certificate

active

06888994

ABSTRACT:
In order to create an optical device with a photonic band gap extending in two dimensions and with very uniform properties in any direction and for any polarisation state, to within 1%, air holes are etched within a substrate of low refractive index material such silicon oxynitride or silica glass. The ratio of air hole area to the remainder of the substrate is low, being less than 35%. The air holes define a quasicrystal structure, having twelve fold symmetry, being based on a square-triangle system. In another development, an etched substrate with a regular crystal structure or quasicrystal structure exhibits a non-linear refractive index. Two adjacent areas in such a substrate have different lattice properties, or have defects in the lattices, to create a unidirectional transmission path (diode action). A further beam of light may be used to modulate the transmission path by reason of the non-linear refractive index.

REFERENCES:
patent: 5187461 (1993-02-01), Brommer et al.
patent: 5471180 (1995-11-01), Brommer et al.
patent: 5559825 (1996-09-01), Bloemer et al.
patent: 5748057 (1998-05-01), De Los Santos
patent: 5751466 (1998-05-01), Dowling et al.
patent: 5784400 (1998-07-01), Joannopoulos et al.
patent: 5802236 (1998-09-01), DiGiovanni et al.
patent: 5997795 (1999-12-01), Danforth et al.
patent: 5999308 (1999-12-01), Nelson et al.
patent: 6002522 (1999-12-01), Hayase et al.
patent: 6028693 (2000-02-01), Fork et al.
patent: 6262830 (2001-07-01), Scalora
patent: 6538794 (2003-03-01), D'Aguanno et al.
patent: 6640034 (2003-10-01), Charlton et al.
patent: 6674778 (2004-01-01), Lin et al.
patent: 6683898 (2004-01-01), Østergaard et al.
patent: 6710912 (2004-03-01), Filkins et al.
patent: 20020021878 (2002-02-01), Allan et al.
patent: 20020059897 (2002-05-01), John et al.
patent: 20020061176 (2002-05-01), Libori et al.
patent: 20020181911 (2002-12-01), Wadsworth et al.
patent: 20030174940 (2003-09-01), Charlton et al.
patent: 0 810 453 (1997-12-01), None
patent: 9853351 (1998-11-01), None
Fleming J G et al; “Fabrication and Properties of 3-D Polysilicon Photonic Lattices in the Infrared”; Technical Digest of the IEEE International MEMS '99 Conference. 12THIEEE International Conference on Micro Electro Mechanical Systems. Orlando, Fl.; Jan. 17-21, 1999 IEEE International, Micro Electro Mechanical Systems Conference, New York, NY: IEE, 1999, pp. 366-370, XP000830775.
Patent Abstract of Japan, vol. 1999, No. 13, Nov. 30, 1999, & JP 11-218627 A (Nippon Telegr & Teleph Corp & LT; NTT&GT), Aug. 10, 1999.

Affiliated with

Also associated with

Rating

Optical device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3459627