Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2005-03-24
2010-06-15
Peace, Rhonda S (Department: 2874)
Optical waveguides
With optical coupler
Plural
C385S018000, C385S125000
Reexamination Certificate
active
07738749
ABSTRACT:
The present invention has been made for providing a photonic crystal capable of multiplexing or demultiplexing light within a wavelength band having a certain width. It includes a slab-shaped body21provided with plural forbidden band zones211and212,and holes221and222having different sizes are arranged in the forbidden band zones with different cycles, respectively. Also formed are a trunk waveguide24extending along the direction inclined by +30 degrees from a perpendicular of the boundary23between the forbidden band zones211and212,and a branch waveguide25extending along the direction inclined by −30 degrees. A ray of light within the multiplexed/demultiplexed wavelength band, which is excluded from the transmission wavelength band of the trunk waveguide24in the forbidden band zone212and included in the transmission wavelength band of the trunk waveguide24in the forbidden band zone211,is reflected by the boundary23and thereby demultiplexed from the trunk waveguide24into the branch waveguide25. Thus, all the rays of light whose wavelengths are within the multiplexed/demultiplexed wavelength band having a certain width are demultiplexed into the branch waveguide25. Therefore, even if the wavelength of the optical signal is deviated due to some error, the light can be demultiplexed. This is also true for the multiplexing operation.
REFERENCES:
patent: 5253319 (1993-10-01), Bhagavatula
patent: 5612171 (1997-03-01), Bhagavatula
patent: 6130969 (2000-10-01), Villeneuve et al.
patent: 6310991 (2001-10-01), Koops et al.
patent: 6512866 (2003-01-01), Fan et al.
patent: 6738551 (2004-05-01), Noda et al.
patent: 6888994 (2005-05-01), Baumberg et al.
patent: 7224862 (2007-05-01), Noda et al.
patent: 7428352 (2008-09-01), Noda et al.
patent: 2002/0009277 (2002-01-01), Noda et al.
patent: 2002/0118923 (2002-08-01), Wang et al.
patent: 2004/0017960 (2004-01-01), Platzman et al.
patent: 2004/0165815 (2004-08-01), Kitagawa
patent: 2004/0184715 (2004-09-01), Platzman et al.
patent: 2005/0146778 (2005-07-01), Noda et al.
patent: A 6-88915 (1994-03-01), None
patent: A 8-160259 (1996-06-01), None
patent: A 2001-508887 (2001-07-01), None
patent: A 2001-215350 (2001-08-01), None
patent: A 2001-272555 (2001-10-01), None
patent: B2 3334381 (2002-02-01), None
patent: A 2002-510400 (2002-04-01), None
patent: A 2002-268105 (2002-09-01), None
patent: B2 3417373 (2003-04-01), None
patent: B2 3459827 (2003-08-01), None
patent: A 2003-279764 (2003-10-01), None
patent: A 2004-212416 (2004-07-01), None
patent: A 2004-233941 (2004-08-01), None
patent: A 2004-334190 (2004-11-01), None
patent: WO 98/53350 (1998-11-01), None
patent: WO 98/57207 (1998-12-01), None
patent: WO 03/077023 (2003-09-01), None
Takashi Asano et al., “Optical Add/Drop Filter Using 2D Photonic Crystal Slab -Interference between single defects-,” 29p-L-7, p. 1039, 2002.
B.S.Song et al., “Optical Add/Drop Filter Using an In-plane Hetero Photonic Crystal,” 25p-YA-17, p. 916, 2002.
Y. Tanaka et al., “Effects of TM-like Slab Mode on Line-Defect Waveguide in 2D Photonic Crystal Slab,” 28a-YN-9, p. 1129, 2003.
Alongkam Chutinan et al. “Waveguides and waveguide bends in two-dimensional photonic crystal slabs,” Physical Review B, 2003. vol. 62, No. 7, pp. 4488-4492, 2000.
Asano Takashi
Noda Susumu
Takayama Seiichi
Kyoto University
Oliff & Berridg,e PLC
Peace Rhonda S
TDK Corporation
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