Optical coupling device

Details Optical coupling device Optical coupling device

2003-12-29

2011-11-22

Rahill, Jerry (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling function

C385S043000

Reexamination Certificate

active

08064741

ABSTRACT:
An optical mode converter has a coupling waveguide and a receiving waveguide. The coupling waveguide has at an input end a first effective refractive index and includes a tapered core of a substantially constant refractive index with a substantially square cross section at the input end, which has a size that tapers down moving away from the input end. The coupling waveguide also has a cladding at least partially surrounding the tapered core. The receiving waveguide has a second effective refractive index at an output end and includes a core of a substantially constant refractive index greater than the refractive index of the tapered core of the coupling waveguide and a cladding at least partially surrounding the core. A side surface of the tapered core of the coupling waveguide is optically in contact, in a coupling portion, with the receiving waveguide so as to allow optical coupling between the coupling waveguide and the receiving waveguide. The refractive index of the tapered core of the coupling waveguide is selected so that the first effective refractive index and the second effective refractive index differ from each other in absolute value less than 30% of the difference between the core refractive index and the effective refractive index of the receiving waveguide.

REFERENCES:
patent: 6310995 (2001-10-01), Saini et al.
patent: 6396984 (2002-05-01), Cho et al.
patent: 2002/0118916 (2002-08-01), Lee et al.
patent: 2003/0035633 (2003-02-01), Agarwal et al.
patent: 2003/0053756 (2003-03-01), Lam et al.
patent: 1 202 085 (2002-05-01), None
patent: 2 317 023 (1998-03-01), None
patent: 2 345 980 (2000-07-01), None
Yasuoka, N., “Semiconductor Light Guide,” Patent Abstract of Japan of JP No. 04-283704, 2 Sheets, (Oct. 8, 1992).
R. Zengerle et al.; “Low-loss beamwidth transformers on InP with reduced requirements on lithographic resolution” Journal of Vacuum Science and Technology B, vol. 11, No. 6, pp. 2641-2644, (1993).
R. Zengerle. et al.; “Fabrication of optical beamwidth transformers for guided waves on InP using wedge-shaped taper structures”, Journal of Vacuum Science and Technology B, vol. 9, No. 6, pp. 3459-3463, (1991).
R. Zengerle. et al.; “Laterally Tapered InP-InGaAsP Waveguides for Low-Loss Chip-to-Fiber Butt Coupling: A Comparison of Different Configurations”, IEEE Photonics Technology Letters, vol. 7, No. 5, pp. 532-534, (1995).
R. S. Fan et al.; “Tapered Polymer Single-Mode Waveguides for Mode Transformation”, Journal of Lightwave Technology, vol. 17, No. 3, pp. 466-474, (1999).
I. Moerman et al.; “A Review on Fabrication Technologies for the Monolithic Integration of Tapers with III-V Semiconductor Devices”, IEEE Journal of Selected Topics in Quantum Electronics, vol. 3, No. 6, pp. 1308-1320, (1997).

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4287966