Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2005-10-11
2005-10-11
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Particular coupling structure
C385S014000
Reexamination Certificate
active
06954568
ABSTRACT:
An apparatus and method for splitting and combining optical beams with reduced contact loss and electrical isolation. In one embodiment, an apparatus according to embodiments of the present invention includes a first optical waveguide section disposed in semiconductor material. The apparatus further includes second and third optical waveguide sections symmetrically disposed in the semiconductor material proximate to an end of the first optical waveguide section. First and second insulating gap regions are disposed in the semiconductor material between the first and second optical waveguide sections and the first and third optical waveguide sections, respectively, such that there is a first evanescent coupling between first and second optical waveguide sections across the first insulating gap region and there is a second evanescent coupling between the first and third optical waveguide sections across the second insulating gap region. The first, second, and third waveguide sections are electrically isolated.
REFERENCES:
patent: 4760580 (1988-07-01), Thompson et al.
patent: 5818989 (1998-10-01), Nakamura
patent: 5923801 (1999-07-01), Frank et al.
patent: 6222966 (2001-04-01), Khan et al.
patent: 6470104 (2002-10-01), Paniccia et al.
patent: 2004/0008944 (2004-01-01), Johannessen et al.
patent: 2004/0017975 (2004-01-01), Zheng et al.
patent: WO 02/44772 (2002-06-01), None
patent: WO 02/44772 (2002-06-01), None
patent: PCT/US2004/008422 (2004-09-01), None
Treyz, G.V., “Silicon Mach-Zehnder Waveguide Interferometers Operating at 1.3μm,”Electronics Letters, vol. 27, No. 2, Jan. 17, 1991, pp. 118-120.
Treyz, G.V., et al., “Silicon Mach-Zehnder Waveguide Interferometers Based on the Plasma Dispersion Effect,”Applied Physics Letters, vol. 59, No. 7, Aug. 12, 1991, pp. 771-773.
Liu, Y.L. et al., “Silicon 1=2 Digital Optical Switch Using Plasma Dispersion,”Electronics Letters, vol. 30, No. 2, Jan. 20, 1994, pp. 130-131.
Fischer, U. et al., “Integrated Optical Waveguide Switches in SOI,” Proceedings 1995 IEEE International SOI Conference, Oct. 1995, pp. 141-142.
Tsutumi, K., et al., “Analysis of Single-Mode Optical Y-Junctions By the Bounded Step and Bend Approximation”,Journal of Lightwave Technology, vol. 6, No. 4, (Apr. 1988), pp. 590-600.
Rangaraj, M., et al., “Low Loss Integrated Optical Y-Branch”,Journal of Lightwave Technology, vol. 7, No. 5, (May 1989), pp. 753-758.
Shani, Y., et al., “Buried Rib Passive Waveguide Y Junctions with Sharp Vertex on InP”,IEEE Photonics Technology Letters, vol. 3, No. 3, (Mar. 1991), pp. 210-212.
Font Frank G.
Kalivoda Christopher M.
LandOfFree
Method and apparatus for splitting or combining optical... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for splitting or combining optical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for splitting or combining optical... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3449734