Optical waveguides – With optical coupler – Particular coupling function
Patent
1998-05-15
2000-08-08
Lee, John D.
Optical waveguides
With optical coupler
Particular coupling function
385 1, 385 24, 385 39, 385 40, 385 50, G02B 6293
Patent
active
061013005
ABSTRACT:
A highly efficient channel drop filter. The filter employs a coupling element including a resonator-system between two waveguides, which contains at least two resonant modes. The resonator-system includes one or more interacting resonant cavities which in addition to being coupled to the waveguides, can also be coupled directly among themselves and indirectly among themselves via the waveguides. Each component of the coupling element can be configured or adjusted individually. The geometry and/or dielectric constant/refractive index of the resonator-system are configured so that the frequencies and decay rates of the resonant modes are made to be substantially the same. The filter can achieve 100% signal transfer between the waveguides at certain frequencies, while completely prohibiting signal transfer at other frequencies. In exemplary embodiments, the filter is configured with photonic crystals. In accordance with alternative embodiments of the invention, the filter is configured as an absorption induced on/off switch and modulator. The switching action is achieved with either electrical or optical absorption.
REFERENCES:
patent: 3589794 (1971-06-01), Marcatili
patent: 4097826 (1978-06-01), Knox et al.
patent: 4282499 (1981-08-01), DeFonzo
patent: 4695121 (1987-09-01), Mahapatra et al.
patent: 4720160 (1988-01-01), Hicks
patent: 4759596 (1988-07-01), Po et al.
patent: 4772863 (1988-09-01), Rosenberg et al.
patent: 4799749 (1989-01-01), Borner et al.
patent: 5187461 (1993-02-01), Brommer et al.
patent: 5389943 (1995-02-01), Brommer et al.
patent: 5440421 (1995-08-01), Fan et al.
patent: 5471180 (1995-11-01), Brommer et al.
patent: 5506712 (1996-04-01), Sasayama et al.
patent: 5600483 (1997-02-01), Fan et al.
patent: 5682401 (1997-10-01), Joannopoulos et al.
patent: 5712648 (1998-01-01), Tsujiguchi
patent: 5721796 (1998-02-01), de Barros et al.
patent: 5742633 (1998-04-01), Stone et al.
patent: 5784400 (1998-07-01), Joannopoulos et al.
Koops, H. W. P., "Photonic Crystals Built By Three-Dimensional Additive Lithography Enable Integrated Optics of High Density," vol. 2849, (Aug. 5, 1996): 248-256 (SPIE).
Fan et al., "Theoretical investigation of Fabrication-Related disorder on the properties of Photonic Crystals," J. Appl. Physics, vol. 78(3), (Aug. 1995): 1415-1418.
Villeneuve et al., "Microcavities in Photonic Crystals: Mode Symmetry, Tunability, and Coupling Efficiency," Physical Review B, vol. 54 No. 11, (Sep. 1996): 7837-7842.
Villeneuve et al., "Single-Mode Waveguide Microcavity for Fast Optical Switching," Optics Letters, vol. 21 No. 24, (Dec. 1996):2017-2019.
Micro-Ring Resonator Channel Dropping Filters by B.E. Little, S.T. Chu and H.A. Haus; 1995 IEEE LEOS Annual Meeting: vol. 2, Nov. 1-2, 1995.
Microring Resonator Channel Dropping Filters by B.E. Little, S.T. Chu, H.A. Haus, J. Foresi, and J.P. Laine, Journal of Lightwave Technology, vol. 15, No. 6, Jun. 1997.
Fan Shanhui
Haus Hermann A.
Joannopoulos John D.
Little Brent E.
Villeneuve Pierre R.
Lee John D.
Massachusetts Institute of Technology
Stahl Michael J.
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