| Patent Number |
Title Of Patent |
Date Issued |
| 7430345 |
Polarization controller using a hollow-core photonic-bandgap fiber |
September 30, 2008 |
| A polarization controller is provided. The polarization controller includes a hollow-core photonic-bandgap fiber, wherein at least a portion of the hollow-core photonic-bandgap fiber has a longitudinal axis and is twisted about the longitudinal axis. |
| 7417219 |
Effect of the plasmonic dispersion relation on the transmission properties of subwavelength hole |
August 26, 2008 |
| Using a realistic plasmonic model, an optically thick electrically conductive film with subwavelength hole or holes therein is shown to always support propagating modes near the surface plasmon frequency, where cross-sectional dimensions of the hole or holes are less than about .lamd |
| 7412127 |
Photonic crystal reflectors/filters and displacement sensing applications |
August 12, 2008 |
| We introduce a mechanically tunable photonic crystal structure consisting of coupled photonic crystal slabs. Using both analytic theory, and first-principles finite-difference time-domain simulations, we demonstrate that the transmission and reflection coefficients for light normally |
| 7400806 |
Photonic-bandgap fiber with a core ring |
July 15, 2008 |
| A photonic-bandgap fiber includes a photonic crystal lattice with a material having a first refractive index and a pattern of regions formed therein. Each of the regions has a second refractive index lower than the first refractive index. The photonic-bandgap fiber further includes a |
| 7327914 |
Adaptive optical signal processing with multimode waveguides |
February 5, 2008 |
| Optical signals are passed in an optical medium using an approach that facilitates the mitigation of interference. According to an example embodiment, a filtering-type approach is used with an optical signal conveyed in an optical fiber, such as a multimode fiber (MMF) or a multimode |
| 7269313 |
Ultra-slow down and storage of light pulses, and altering of pulse spectrum |
September 11, 2007 |
| Light pulses can be stopped and stored coherently, with an all-optical process that involves an adiabatic and reversible pulse bandwidth compression occurring entirely in the optical domain. Such a process overcomes the fundamental bandwidth-delay constraint in optics, and can genera |
| 7260287 |
Nano-electromechanical high-index contrast |
August 21, 2007 |
| A nano-electromechanical optical switch includes an input optical waveguide that is provided with an optical signal. At least two output optical waveguides are coupled to the input optical waveguide. The deflection of the input optical waveguide aligns with one of either of the two o |
| 7228041 |
Photonic-bandgap fiber with a core ring |
June 5, 2007 |
| A photonic-bandgap fiber includes a photonic crystal lattice with a first material having a first refractive index and a pattern of a second material formed therein. The second material has a second refractive index lower than the first refractive index. The photonic crystal lattice |
| 7190853 |
Tunable chromatic dispersion compensation |
March 13, 2007 |
| A system for dispersion compensation is provided including a plurality of optical cavities with each including a specific resonant frequency and resonant linewidth. At least one coupling element interconnects the optical cavities. The at least one coupling element defines the coupling |
| 7155087 |
Photonic crystal reflectors/filters and displacement sensing applications |
December 26, 2006 |
| We introduce a mechanically tunable photonic crystal structure consisting of coupled photonic crystal slabs. Using both analytic theory, and first-principles finite-difference time-domain simulations, we demonstrate that the transmission and reflection coefficients for light normally |
| 7142364 |
Guided resonance dielectric filter systems |
November 28, 2006 |
| We theoretically introduce a new type of optical all-pass filter based on guided resonance in coupled photonic crystal slabs. The filter exhibits near-complete transmission for both on- and off-resonant frequencies and yet generates large resonant group delay. We further show that such a |
| 7116864 |
Stopping and time reversing light in a waveguide with an all-optical system |
October 3, 2006 |
| We introduce a new all-optical mechanism that can compress the bandwidth of light pulses to absolute zero, and bring them to a complete stop. The mechanism can be realized in a system consisting of a waveguide side-coupled to tunable resonators, which generates a photonic band struct |
| 7110650 |
Method for configuring air-core photonic-bandgap fibers free of surface modes |
September 19, 2006 |
| Coupling of core modes to surface modes in an air-core photonic-bandgap fiber (PBF) can cause large propagation losses. Computer simulations analyze the relationship between the geometry and the presence of surface modes in PBFs having a triangular hole pattern and identify ranges of |
| 6957003 |
Creating large bandwidth line defects by embedding dielectric waveguides into photonic crystal s |
October 18, 2005 |
| We introduce a general designing procedure that allows us, for any given photonic crystal slab, to create an appropriate line defect structure that possesses single-mode bands with large bandwidth and low dispersion within the photonic band gap region below the light line. This procedure |
| 6917431 |
Mach-Zehnder interferometer using photonic band gap crystals |
July 12, 2005 |
| A photonic crystal optical switch having a periodic dielectric structure including at least one input waveguide. First and second waveguide arms branch from the input waveguide in which the relative optical path lengths of electromagnetic radiation within the arms are controlled by stimu |
| 6909729 |
Dielectric waveguide with transverse index variation that support a zero group velocity mode at |
June 21, 2005 |
| Optical components including a laser based on a dielectric waveguide extending along a waveguide axis and having a refractive index cross-section perpendicular to the waveguide axis, the refractive index cross-section supporting an electromagnetic mode having a zero group velocity fo |
| 6903873 |
High omnidirectional reflector |
June 7, 2005 |
| A reflector, a method of producing same and a method of creating high omnidirectional reflection for a predetermined range of frequencies of incident electromagnetic energy for any angle of incidence and any polarization. The reflector includes a structure with a surface and a refrac |
| 6853789 |
Low-loss resonator and method of making same |
February 8, 2005 |
| A method of making a low-loss electromagnetic wave resonator structure. The method includes providing a resonator structure, the resonator structure including a confining device and a surrounding medium. The resonator structure supporting at least one resonant mode, the resonant mode |
| 6819691 |
Creating sharp asymmetric lineshapes in microcavity structures |
November 16, 2004 |
| We disclose a new structure that allows the creation of sharp and asymmetric lineshapes in optical microcavity systems. In this structure, the response function can vary from 0% to 100% in a frequency range that is narrower than the full width of the resonance itself. Therefore, an o |
| 6624945 |
Thin film filters using omnidirectional reflectors |
September 23, 2003 |
| An electromagnetic wavelength filter that allows the transmission of electromagnetic energy within a narrow range of wavelengths while reflecting incident electromagnetic energy at other wavelengths. The filter includes at least one cavity region; and at least two reflectors surround |
| 6603911 |
Omnidirectional multilayer device for enhanced optical waveguiding |
August 5, 2003 |
| A device having at least one dielectric inner core region in which electromagnetic radiation is confined, and at least two dielectric outer regions surrounding the inner core region, each with a distinct refractive index. The outer regions confine electromagnetic radiation within the |
| 6574383 |
Input light coupler using a pattern of dielectric contrast distributed in at least two dimension |
June 3, 2003 |
| An input light-coupling device comprising a dielectric layer containing a pattern of dielectric contrast distributed in at least two dimensions. The pattern of dielectric contrast, which may or may not be periodic, is designed to facilitate coupling to the dielectric layer of electromagn |
| 6512866 |
High efficiency channel drop filter with absorption induced on/off switching and modulation |
January 28, 2003 |
| 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 |
| 6512242 |
Resonant-tunneling electronic transportors |
January 28, 2003 |
| An electronic transportor that allows for the resonant tunneling of electrons between guided states, such as those found in a quantum wire or a line defect in a solid, and localized states, such as those found in a quantum dot or a point defect in a solid, using lateral coupling. In some |
| 6463200 |
Omnidirectional multilayer device for enhanced optical waveguiding |
October 8, 2002 |
| A device having at least one dielectric inner core region in which electromagnetic radiation is confined, and at least two dielectric outer regions surrounding the inner core region, each with a distinct refractive index. The outer regions confine electromagnetic radiation within the |
| 6424763 |
Tunable add/drop filter using side-coupled resonant tunneling |
July 23, 2002 |
| A tunable electromagnetic field frequency filter having an input waveguide which carries a signal including at least one desired frequency, and an output waveguide. A resonator-system is coupled to the input and output waveguides and is operable for the selective transfer of the at least |
| 6198860 |
Optical waveguide crossings |
March 6, 2001 |
| An optical waveguide structure including a first waveguide, a second waveguide that intersects with the first waveguide, and a photonic crystal resonator system at the intersection of the first and second waveguides. In accordance with another embodiment there is provided an optical |
| 6134043 |
Composite photonic crystals |
October 17, 2000 |
| A composite photonic crystal structure comprising a guide crystal configured in a lane having a dielectric periodicity in at least a first direction in the plane; and barrier crystals configured above and below the guide crystal to confine light within the guide crystal, the barrier |
| 6130969 |
High efficiency channel drop filter |
October 10, 2000 |
| 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 |
| 6130780 |
High omnidirectional reflector |
October 10, 2000 |
| A reflector, a method of producing same and a method of creating high omnidirectional reflection for a predetermined range of frequencies of incident electromagnetic energy for any angle of incidence and any polarization. The reflector includes a structure with a surface and a refrac |
| 6101300 |
High efficiency channel drop filter with absorption induced on/off switching and modulation |
August 8, 2000 |
| 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 |
| 6058127 |
Tunable microcavity and method of using nonlinear materials in a photonic crystal |
May 2, 2000 |
| A nonlinear dielectric material is incorporated within a photonic crystal as a means of changing the refractive index of a defect. In this way, the resonant frequency can be easily adjusted, after fabrication, by external mechanisms (either optical or electronic). The ability to tune the |
| 5990850 |
Metallodielectric photonic crystal |
November 23, 1999 |
| A metallodielectric photonic crystal including a plurality of elements, each having a non-dielectric component, arranged with respect to each other in a three-dimensionally periodic lattice. The non-dielectric components being spatially isolated from one another, the lattice exhibiti |
| 5955749 |
Light emitting device utilizing a periodic dielectric structure |
September 21, 1999 |
| A light emitting device comprising a substrate and a dielectric structure having at least a two-dimensionally periodic variation of dielectric constant which exhibits a spectrum of electromagnetic modes including guided modes of frequencies below a predetermined frequency cutoff and |
| 5682401 |
Resonant microcavities employing one-dimensionally periodic dielectric waveguides |
October 28, 1997 |
| The present invention provides a resonant microcavity which includes a periodic dielectric waveguide, and a local defect in the periodic dielectric waveguide which accommodates spacial confinement of radiation generated within the waveguide around the defect. In an alternative embodi |
| 5600483 |
Three-dimensional periodic dielectric structures having photonic bandgaps |
February 4, 1997 |
| A periodic dielectric structure and method of fabricating same, the structure having a three-dimensional photonic bandgap. The structure includes a plurality of layers, at least one layer having a stratum of a first material having a first dielectric constant and a plurality of paral |
| 5440421 |
Three-dimensional periodic dielectric structures having photonic bandgaps |
August 8, 1995 |
| A periodic dielectric structure and method of fabricating same, the structure having a three-dimensional photonic bandgap. The structure includes a plurality of layers, each layer having a stratum of a first material having a first dielectric constant and a plurality of parallel groo |
