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| Number | Title | Issue Date |
| 8126300 | Segmented waveguide structure Segmented waveguide structures provide mode matching in planar lightwave circuits between waveguides and other waveguiding structures, e.g. slab waveguides and optical fibers. The present invention eliminates back reflections from the core segments by etching the le... | 02/28/2012 |
| 8126299 | Production of optical pulses at a desired wavelength utilizing higher-order-mode (HOM) fiber An apparatus and method for producing optical pulses of a desired wavelength utilizes a section of higher-order-mode (HOM) fiber to receive input optical pulses at a first wavelength, and thereafter produce output optical pulses at the desired wavelength through sol... | 02/28/2012 |
| 8116603 | Low-loss Bloch wave guiding in open structures and highly compact efficient waveguide-crossing arrays Low-loss waveguide structures may comprise a multimode waveguide supporting a periodic light intensity pattern, and attachments disposed at the waveguide adjacent low-intensity regions of the light intensity pattern. ... | 02/14/2012 |
| 8111957 | +cylindrical polarization beams Generation of a cylindrically polarized light beam, and in particular, a hybrid-azimuthal-radial polarization beams, called HARP modes, generated from an input linearly polarized Gaussian beam using a spun optical waveguide device is taught. The HARP modes are compr... | 02/07/2012 |
| 8078020 | Optical mode-converter structure An apparatus comprising an optical-mode-converter structure. The optical-mode-converter structure includes a tapered optical core on a planar substrate, an optical cladding layer covering the tapered optical core and a mode-expanding layer. The mode-expanding layer ... | 12/13/2011 |
| 8068705 | Single-mode high-power fiber laser system A monolithic fiber is configured with a double bottleneck-shaped multimode (MM) core capable of supporting substantially only a fundamental mode at a given wavelength and having opposite end regions, frustoconically shaped transformer regions, which run inwards from... | 11/29/2011 |
| 8068706 | Fabrication-tolerant waveguides and resonators An optical waveguide having a core region with a substantially rectangular cross-section with a selected aspect ratio of width to height. Embodiments include devices incorporating the optical waveguide and methods for using the optical waveguide. ... | 11/29/2011 |
| 8064741 | Optical coupling device An optical mode converter has a coupling waveguide and a receiving waveguide. The coupling waveguide has at an input end a first effective refractive index and includes a tapered core of a substantially constant refractive index with a substantially square cross sec... | 11/22/2011 |
| 8045830 | Apparatus and method for excitation of a single mode in a waveguide A wave-guiding system and method for mode-selective transmission of a spatially coherent light beam is disclosed. The system comprises a wave-guide with an inlet and an outlet for transmitting one or more modes; a first mode-shaping optical element for shaping the s... | 10/25/2011 |
| 8031991 | Low index, large mode field diameter optical coupler An optical coupler is formed of a low index material and exhibits a mode field diameter suitable to provide efficient coupling between a free space optical signal (of large mode field diameter) and a single mode high index waveguide formed on an optical substrate. O... | 10/04/2011 |
| 8000570 | Sequentially increasing effective area in higher-order mode (HOM) Signal Propagation Disclosed are multi-stage optical amplifiers that propagate higher-order mode (HOM) signals. One embodiment, among others, comprises a first segment of optical fiber in which a first HOM signal propagates, a second segment of optical fiber in which a second HOM sign... | 08/16/2011 |
| 7970243 | Optical device, optical coupler and integrated circuit The present invention provides an MMI optical device that can prevent a possible decrease in transmission rate in spite of miniaturization and integration. The optical device includes a rectangular multimode waveguide and an electromagnetic wave absorber of a light ... | 06/28/2011 |
| 7949212 | Optical waveguide element and method for polarization splitting Disclosed is an optical waveguide element that includes first and second optical waveguides (11, 12) which are formed to have different waveguide modes of guided lights, whose polarized waves are different. First optical waveguide (11) includes directi... | 05/24/2011 |
| 7945130 | Mode scrambling apparatus for multimode fiber Apparatus and methods for scrambling optical modes in multimode fibers to achieve uniform light distribution in guided multi-mode light for various applications. ... | 05/17/2011 |
| 7903909 | Low-loss bloch wave guiding in open structures and highly compact efficient waveguide-crossing arrays Low-loss waveguide structures may comprise a multimode waveguide supporting a periodic light intensity pattern, and attachments disposed at the waveguide adjacent low-intensity regions of the light intensity pattern. ... | 03/08/2011 |
| 7894692 | Method and device for suppressing high-order modes in MM fibers A laser system includes a multimode fiber (MMF) having a permanent perturbation region which is provided at the predetermined distance from the upstream end of the MMF. The perturbation region is configured so that propagating fundamental and at least one high-order... | 02/22/2011 |
| 7865045 | Locally perturbed optical fibers for mode transformers The specification describes optical devices and related methods wherein an input mode is converted by multiple LPG mode transformers to produce an output with multiple predetermined modes. ... | 01/04/2011 |
| 7835603 | Mode converter An in-fiber mode converter comprises fiber portions (10) constituting an input microlens, a fiber portion (20) constituting a phase shifting region adapted to convert a propagation mode of an optical signal into another propagation mode, and fiber port... | 11/16/2010 |
| 7729574 | Optical beam flattening using multi-mode fiber The present invention includes a device and method to create a light beam having substantially uniform far-field intensity. Light from a laser source is directed to at least one multimode optical fiber configured produce an intensity profile approximated by a Bessel... | 06/01/2010 |
| 7724995 | Suppresson of undesirable signal propagation mode(s) downstream of mode converter An optical device (D) is dedicated to the transformation of the propagation mode of optical signals. This device comprises at least a first mode converter (3) that is supplied with signals that are propagated in a first guided mode and that delivers the signa... | 05/25/2010 |
| 7693367 | Multi-mode optical coupler A multi-mode optical coupler which includes an integrated section in which two optical fibers are fused and integrated together, at least one of these optical fibers being a multi-mode fiber, the multi-mode optical coupler coupling multi-mode light carried in the on... | 04/06/2010 |
| 7680371 | Interface device for performing mode transformation in optical waveguides An interface device for performing mode transformation in optical waveguides includes an optical waveguide core for propagating light of a particular wavelength or a plurality of wavelengths. The optical waveguide core terminates in a subwavelength grating configure... | 03/16/2010 |
| 7634161 | Three-dimensional periodic structure including anti-reflection structure and light-emitting device The three-dimensional structure includes first and second waveguides, a resonator, a first region. The waveguides cause light to propagate therein in a first guide mode. The second waveguide and the first region are mutually connected such that at least part of the ... | 12/15/2009 |
| 7609918 | Method and apparatus for optical mode division multiplexing and demultiplexing A method of mode selective coupling or mode multiplexing between integrated multimode (600) and single mode (602) waveguides. Evanescent coupling and tapering is used so that the signal may be transferred adiabatically from a first region of a first wa... | 10/27/2009 |
| 7590317 | High energy fiber optics laser delivery system with improved scrambling capabilities The methods and apparatus of the present invention provide advantages for remote laser delivery systems that conduct high levels of light energy through a fiber optic cable to a target surface. Helical fiber optic mode scramblers in accordance with the present inven... | 09/15/2009 |
| 7577325 | Method of fabricating a polarization sorter A method of fabricating a passive polarization sorter includes the steps of providing first and second waveguides. The first waveguide has an input and an output. The first waveguide supporting at least one guided TE polarized mode of mode ranking mode-i-TE and at l... | 08/18/2009 |
| 7574081 | Optical system with optical waveguides The present invention provides an optical system with waveguides, which comprises first, second and third optical input/output means (12, 14, 16), fourth and fifth multi-mode optical waveguides (20, 22) each capable of propagating light with plural pro... | 08/11/2009 |
| 7565046 | Mode transformers for low index high confinement waveguides The mode transforming structure includes a first waveguide structure. A slot waveguide region is coupled to the first waveguide structure. The slot waveguide region includes one or more complementary tapered pairs so near lossless transforming between the first wave... | 07/21/2009 |
| 7539373 | Integrated lateral mode converter The invention describes method and apparatus for a mode converter enabling an adiabatic transfer of a higher order mode into a lower order optical mode within a photonic integrated circuit exploiting integrated semiconductor ridge waveguide techniques. As disclosed ... | 05/26/2009 |
| 7536069 | Method and apparatus for resonant coupling in photonic crystal circuits The present invention is a method and an apparatus for resonant coupling in photonic crystal circuits. In one embodiment, a photonic crystal device comprises a substrate having a plurality of apertures formed therethrough, a photonic crystal circuit (e.g., formed by... | 05/19/2009 |
| 7505648 | Device comprising a polarization-independent micro-resonator Polarization-diverse optical devices and related methods are disclosed. In some embodiments, these devices and methods are realized by utilizing a four-port, wavelength-dependent optical coupler that is arranged to receive identical counter-propagating optical signa... | 03/17/2009 |
| 7499610 | Method of using a polarization sorter A method of using a passive polarization sorter comprising the step of deploying a first waveguide and a second waveguide forming an adiabatic region along a portion of their length. Then, an input optical signal is introduced into the first waveguide wherein light ... | 03/03/2009 |
| 7440651 | Single mode whispering-gallery-mode resonator Whispering-gallery-mode (WGM) resonators configured to support only a single whispering gallery mode. ... | 10/21/2008 |
| 7434940 | Light coupling system and method A light coupling system includes a waveguide, configured to receive light from at least two light sources and to internally reflect light therein; a diffraction grating, disposed upon the waveguide; and a switchable Bragg grating, disposed upon the waveguide. The di... | 10/14/2008 |
| 7433115 | Light emitting device A light emitting device comprises a first unit and a second unit, the first unit comprising: a first excitation light source comprising a laser element emitting blue wavelength band excitation light; a first wavelength converting member comprising at least one type ... | 10/07/2008 |
| 7424193 | Composite waveguide A composite waveguide comprising a central core and at least one side core helically wound about said central core and in optical proximity to said central core. ... | 09/09/2008 |
| 7415177 | Dispersion compensation device and dispersion compensation method A dispersion compensating fiber whose chromatic dispersion is positive and a negative dispersion compensating fiber whose chromatic dispersion is negative are prepared, and division-multiplexed optical signals, after being guided to either dispersion compensating fi... | 08/19/2008 |
| 7415175 | High bit rate optical communication over multimode fibers An optical communication system includes a transmitter that receives an input optical signal from an optical source and performs filtering so that an output signal from the transmitter includes a specific set of fiber modes that are allowed to pass for further proce... | 08/19/2008 |
| 7412134 | Apparatus and methods for remakeable connections to optical waveguides A single-mode optical waveguide with a core, surrounded by a cladding consisting of an inner soft layer and an outer harder layer is described. The outer layer has a grating structure on its inner surface, whose spatial frequency is the same as that of the guided mo... | 08/12/2008 |
| 7412128 | Higher order mode dispersion compensating fiber and mode converter for higher order fiber A higher order mode dispersion compensating fiber includes an optical fiber and a first loss layer which is provided within the fiber and which attenuates a lower order mode propagating through the optical fiber while not attenuating a higher order mode which is hig... | 08/12/2008 |
