Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-07-12
2005-07-12
Healy, Brian M. (Department: 2883)
Optical waveguides
With optical coupler
Input/output coupler
C385S001000, C385S002000, C385S003000, C385S024000, C385S014000, C398S082000, C398S083000, C398S087000
Reexamination Certificate
active
06917736
ABSTRACT:
A phased-array device for wavelength division multiplexing/demultiplexing, comprising at least one input channel, a plurality of output channels, and an irregularly sampled array of phase modulators between the input and output channels, the irregular array having a configuration and phase modulation such that effectively only one beam at a given wavelength is focused onto a given output channel. In one embodiment the individual phase modulators are randomly spaced, their relative locations being determined by establishing a set of initially chosen locations, shifting each initial location by a random increment resulting in delay within one wavelength if the initially chosen locations are not sufficiently random, and then adjusting each shifted location a fraction of a wavelength such that the overall phase shift to a desired image point on one of the output channels equals a constant value.
REFERENCES:
patent: 4109996 (1978-08-01), Ersoy
patent: 4279462 (1981-07-01), Ersoy
patent: 4293183 (1981-10-01), Ersoy
patent: 5943159 (1999-08-01), Zhu
patent: 5999320 (1999-12-01), Shirasaki
patent: 6137927 (2000-10-01), Keck et al.
patent: 6317536 (2001-11-01), Bhagavatula et al.
patent: 6674929 (2004-01-01), Feng et al.
patent: 6714704 (2004-03-01), Lin et al.
patent: 2003/0095737 (2003-05-01), Welch et al.
patent: 2003/0128917 (2003-07-01), Turpin et al.
patent: 2004/0037500 (2004-02-01), Yoo
patent: 2004/0062512 (2004-04-01), Pawlowski et al.
H.Takahashi, S. Suzuki, K. Kato, and I. Nishi, “Arrayed-Waveguide Grating for Wavelength Division Multi/Demultiplexer with Nanometre Resolution,”Electron. Lett.,vol. 2, 26., No. Jan. 1990, pp. 87-88.
C. Dragone, “An N x N Optical Multiplexer Using a Planar Arrangement of Two Star Couplers.”IEEE Photon. Technol. Lett.,vol. 3, Sep. 1991, pp. 812-814.
Okan K. Ersoy, “One-Image-Only Digital Holography,”Optik,vol. 53, pp. 47-62, Apr. 1979.
O.K. Ersoy, “Construction of Point Images with the Scanning Electron Microscope: A Simple Algorithm,”Optik,vol. 46, Sep. 1976, pp. 61-66.
Eli Brookner, “Phased-Array Radars,”Scientific American,Feb. 1985, pp. 94-102.
Tom Y. Zhu, “Irregular Virtual Optical Phased-Array,” in Ivan Cindrich, Sing H. Lee, Richard L. Sutherland (ed.),Diffractive/Holographic Technologies and Spatial Light Modulators VII ,Proceedings of SPIE, vol. 3951, 2000, pp. 61-72.
Katsunari Okamoto, “Recent Progress of Integrated Optics Planar Lightwave Circuits,” Kluwer Academic Publishers, Netherlands, 1999, pp. 107-129.
R. Adar et al., “Broad-Band Array Multiplexers Made With Silica Waveguides on Silicon,”Journal of Lightwave Technology,vol. 11, No. 2, Feb. 1993, pp. 212-218.
Hiroshi Takahashi et al., Transmission Characteristics of Arrayed Waveguide N x N Wavelength Multiplexer,Journal of Lightwave Technology,vol. 13, No. 3, Mar. 1995, pp. 447-455.
Meint K. Smit et al., “PHASAR-Based WDM-Devices: Principles, Design and Applications,”IEEE Journal of Selected Topics in Quantum Electronics,vol. 2, No. 2, Jun. 1996, pp. 236-250.
Mark Volanthen et al., “Characterisation of Arrayed Waveguide Gratings,” Kymata Ltd., Mar. 2001.
Bahret William F.
Healy Brian M.
Purdue Research Foundation
LandOfFree
Method of increasing number of allowable channels in dense... 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 of increasing number of allowable channels in dense..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of increasing number of allowable channels in dense... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3385306