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US Patent 6411752 - Vertically coupled optical resonator devices over a cross-grid waveguide architecture
US Patent Issued on June 25, 2002
Estimated Patent Expiration Date:
February 22, 2020Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
February 22, 2020Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractOptical resonators are vertically coupled on top of bus waveguides, and are separated from the waveguides by a buffer layer of arbitrary thickness. The vertical arrangement eliminates the need for etching fine gaps to separate the rings and guides, and reduces the alignment sensitivity between the desired position of the resonator and bus waveguides by a significant degree. The resonator and bus waveguides lie in different vertical layers, and each can therefore be optimized independently. A ring resonator can be optimized for higher index contrast in the plane, small size, and low bending loss, while the bus waveguides can be designed to have lower index contrast in the plane, low propagation losses, and dimensions that make them suitable for matching to optical fibers. The waveguides can also have any lateral placement underneath the ring resonators and are not restricted by the placement of the rings. Furthermore, with the resonators lying on the top layer of the structure, they are easily accessed for tuning and trimming.Other References
| InventorsApplicationNo. 510432 filed on 02/22/2000US Classes:385/17, Matrix switch (i.e., M X N, where M and N are 3 or more)385/24Plural (e.g., data bus)Field of Search385/17, Matrix switch (i.e., M X N, where M and N are 3 or more)385/16, Switch (i.e., switching from one terminal to another, not modulation)385/15, WITH OPTICAL COUPLER385/21, Double pole multiple throw385/23, Single pole single throw385/24, Plural (e.g., data bus)385/18, Reflective-type switch385/20, Multiple pole multiple throw385/19, Stationary waveguides with movable opaque element385/22, Single pole multiple throw (relay switch)385/31, Input/output coupler385/32, Coupling light through a waveguide bend or loop385/39, Particular coupling structure385/40, Electrodes on or near the coupling region385/41, Directional coupler385/42Directional couplerExaminersPrimary: Lee, John D.Assistant: Connelly-Cushwa, Michelle R. Attorney, Agent or FirmUS Patent References3589794, 5158908, Distributed Bragg reflectors and devices incorporating sameIssued on: 10/27/1992 Inventor: Blonder, et al.5247594, Waveguide-type optical matrix switch Issued on: 09/21/1993 Inventor: Okuno, et al.5581643, Optical waveguide cross-point switch Issued on: 12/03/1996 Inventor: Wu5790583, Photonic-well Microcavity light emitting devices Issued on: 08/04/1998 Inventor: Ho5825799, Microcavity semiconductor laser Issued on: 10/20/1998 Inventor: Ho, et al.5828799, Thermal optical switches for light Issued on: 10/27/1998 Inventor: Donald5878070Photonic wire microcavity light emitting devices Issued on: 03/02/1999 Inventor: Ho, et al. Foreign Patent References
International ClassesG02B 006/35G02B 006/28 |
