Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2005-06-14
2005-06-14
Boutsikaris, Leo (Department: 2872)
Optical waveguides
With optical coupler
Plural
C385S037000, C385S047000
Reexamination Certificate
active
06907160
ABSTRACT:
Apparatus for filtering an optical input signal includes a coupler and an arrayed waveguide grating connected to the coupler having a phase shifting region. The phase shifting region is a back wall of a free space region of the arrayed waveguide grating with concentric image and reflector surfaces. Radial waveguides between the surfaces are divided into alternating regions of wider and thinner sets of waveguides. A corresponding change in optical length alters the phase of the input signal which forces an output signal of a desired wavelength to appear at a desired port of the filter.
REFERENCES:
patent: 5953467 (1999-09-01), Madsen
patent: 6023544 (2000-02-01), Dragone
patent: 6212315 (2001-04-01), Doerr
patent: 6493487 (2002-12-01), Temkin et al.
patent: 6597842 (2003-07-01), Dent et al.
patent: 6690846 (2004-02-01), Zhou et al.
Nishi et al., Broad-Passband-Width Optical Filter For Multi/Demultiplexer Using a Diffraction Grating and a Retroreflector Prism, Electronics Letters, May 9, 1985, vol. 21, No. 10, pp. 423-424.
Doerr, C.R., “Proposed WDM Cross Connect Using a Planar Arrangement of Waveguide Grating Routers and Phase Shifters,” IEEE Photon. Technol. Lett., vol. 10, No. 4, pp. 528-530, Apr. 1998.
Doerr, C.R., et al., “Arrayed Waveguide Lens Wavelength Add-Drop in Silica,” IEEE Photon. Technol. Lett., vol. 11, No. 5, pp. 557-559, May 1999.
Thompson, G.H.B., et al., “An Original Low-Loss and Pass-band Flattened SiO2 on Si Planar Wavelength Demultiplexer” OFC '98 Technical Digest, Feb. 1998, p. 77.
Dragone, C., “Efficient Techniques for Widening the Passband of a Waveguide Router,” Journal of Lightwave Technology, vol. 16, No. 16, Oct. 1998, pp. 1895-1906.
Dragone, C., “An N × N Optical Multiplexer Using a Planar Arrangement of Two Star Couplers,” IEEE Photon. Technol. Lett., 3, pp. 812-815, 1991.
Boutsikaris Leo
Lucent Technologies - Inc.
LandOfFree
Apparatus for filtering optical signals does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for filtering optical signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for filtering optical signals will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3507646