Two-dimensional photonic crystal multiplexer/demultiplexer

Details Two-dimensional photonic crystal multiplexer/demultiplexer Two-dimensional photonic crystal multiplexer/demultiplexer

2008-07-29

2008-07-29

Connelly-Cushwa, Michelle (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling function

C385S014000, C398S082000

Reexamination Certificate

active

07406221

ABSTRACT:
An object of the present invention is to provide a multiplexer/demultiplexer capable of preventing a decrease in multiplexing/demultiplexing efficiency due to an error in wavelength or due to a crosstalk with other wavelengths. A two-dimensional photonic crystal having holes22cyclically arranged is provided with an input waveguide23and an output waveguide24. Located between the two waveguides are two point-like defects25and26, each consisting of a region devoid of the holes22. From the light including various wavelengths and propagating through the input waveguide23, the two point-like defects extract a ray of light having a wavelength determined by the shape of the point-like defects and introduce it into the output waveguide24. Compared with the case where there is only one point-like defect, the above-described construction increases the values of the wavelength spectrum of the extracted light at around the resonance wavelength and decreases the values at the wavelength range far from the resonance wavelength. Therefore, the increase in the values of the wavelength spectrum at around the resonance wavelength ensures that the light having the desired wavelength can be extracted from the waveguide by a large amount even if the wavelength of the light propagating through the waveguide is erroneously shifted from the resonance frequency. Occurrence of noises within a wavelength range far from the resonance wavelength and extraction of light having the wavelengths of adjacent channels are also suppressed.

REFERENCES:
patent: 2002/0191905 (2002-12-01), Prather et al.
patent: 2003/0011775 (2003-01-01), Soljacic et al.
patent: 2005/0152649 (2005-07-01), Benisty et al.
patent: 2 841 658 (2004-01-01), None
patent: A 62-100706 (1987-05-01), None
patent: A 2001-228347 (2001-08-01), None
patent: A 2001-272555 (2001-10-01), None
patent: WO 98/57207 (1998-12-01), None
patent: WO 01/20379 (2001-03-01), None
patent: WO 2004/068205 (2004-08-01), None
Yoshimasu Sugimoto et al; 29a-YN-5; “Design and characteriziation of coupling-controlled directional coupler (CC-DC) Based on photonic-crystal FESTA”; Mar. 2003; p. 1137.
Yoshihiro Akahane et al; “Design of a channel drop filter by using a donor-type cavity with high-quality factor in a two-dimensional photonic crystal slab”; Applied Physics Letters; vol. 82, No. 9; Mar. 3, 2003; pp. 1341-1343.
Bong-Shik Song et al; “Photonic Devices Based on In-Plane Hetero Photonic Crystals”; Science; vol. 300; Jun. 6, 2003; p. 1537, right column, lines 1-9, Fig. 1D.
B.S. Song et al; 29a-YN-4; “Improvement of Optical Add/Drop Filtering efficiency by using an In-Plane Hetero structure Interface”; Mar. 2003; p. 1137.
Akahane et al; 29a-YN-9; “Drastic Increase of Quality Factor of Defect-Cavities in 2D Photonic Crystal Slabs by Modifying Defect Structure”; Mar. 2003; p. 1138.
Akahane et al; 1p-ZM-3; “Optical Add/Drop Devices Using 2D Photonic Crystal—Design of device structures to achieve flat-top transfer function in filtering responses”; 2003; p. 944.
Y. Sugimoto et al; “Design, fabrication, and characterization of coupling-strength-controlled directional coupler based on two-Dimensional photonic-crystal slab waveguides”; Applied Physics Letters; Oct. 20, 2003; vol. 83, No. 16; pp. 3236-3238.
Y. Akahane et al; “High-Q photonic nanocavity in a two-dimensional photonic crystal”; Nature Publishing Group; Oct. 30, 2003; vol. 425; pp. 944-947.
B.E. Little et al; “Microring Resonator Channel Dropping Filters”; Journal of Lightwave Technology; vol. 15, No. 6, Jun. 1997; pp. 998-1005.
S. Fan et al; “Channel Drop Tunneling through Localized States”; Physical Review Letters; The American Physical Society; Feb. 2, 1998; vol. 80, No. 5; pp. 960-963.
M.J. Khan et al; “Mode-Coupling Analysis of Multipole Symmetric Resonant Add/Drop Filters”; IEEE Journal of Quantum Electronics; Oct. 1999; vol. 35; No. 10; pp. 1451-1460.
Jin, Chongjun et al; “Reflectionless Multichannel Wavelength Demultiplexer in a Transmission Resonator Configuration”,IEEE Journal of Quantum Electronics, vol. 39, No. 1, Jan. 2003, pp. 160-161.

Affiliated with

Also associated with

Rating

Two-dimensional photonic crystal multiplexer/demultiplexer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two-dimensional photonic crystal multiplexer/demultiplexer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-dimensional photonic crystal multiplexer/demultiplexer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2812363