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| Number | Title | Issue Date |
| 8027555 | Scalable cladding mode stripper device A cladding mode stripper for stripping cladding modes from an optical fiber is disclosed. The cladding mode stripper includes a reflective base and a block of a transparent material disposed on the reflective base. The block of the transparent material has a groove ... | 09/27/2011 |
| 7961994 | Optical interface assembly An optical device includes a first waveguide having an end portion configured to receive an optical signal, the optical signal having a fundamental mode; a second waveguide having an end portion spaced from the end portion of the first waveguide; and a cladding laye... | 06/14/2011 |
| 7817884 | Strain-managed optical waveguide assemblies and methods of forming same The strain-managed optical waveguide assemblies of the present invention utilize a large-mode-area (LMA) optical fiber that is annealed in a first bending such that the fiber in that configuration has substantially no axial strain. A fiber support member is then use... | 10/19/2010 |
| 7773840 | Interface for a-Si waveguides and III/V waveguides A method of coupling a waveguide to a multi-layered active device structure on a substrate is described. The method includes forming a junction area by etching the active device structure to form a sloped etch profile with respect to the substrate, aligning multiple... | 08/10/2010 |
| 7711220 | Mode selective fiber stub, a transmitter optical subassembly that incorporates the stub and methods for making the mode selective fiber stub A fiber stub assembly is provided that has a cladding layer that is reduced in diameter near the end of the stub into which light is launched from a light source. The portion of the stub having the cladding layer with the reduced diameter is surrounded by a light-ab... | 05/04/2010 |
| 7502533 | Mechanism for conditioning launched beams from an optical transmitter A system is disclosed. The system includes an optical waveguide; and an optical transmitter coupled to the optical waveguide. The transmitter includes a optical relay to condition a launch of an optical beam into the optical waveguide to minimize a number of optical... | 03/10/2009 |
| 7440651 | Single mode whispering-gallery-mode resonator Whispering-gallery-mode (WGM) resonators configured to support only a single whispering gallery mode. ... | 10/21/2008 |
| 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 |
| 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 |
| 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 |
| 7403675 | Method of high order mode excitation for multimode intrusion detection Intrusion detection for a multimode fiber optic cable uses a light signal launched into the fiber through the low ratio leg of a tap coupler to establish a narrow spectral width, under-filled non-uniform mode field power distribution in the cable. A small portion of... | 07/22/2008 |
| 7403674 | Intrusion detection system for a multimode optical fiber using a bulk optical wavelength division multiplexer for maintaining modal power distribution Intrusion detection of one section only of a multimode fiber uses a light signal launched into the fiber at a location spaced from the source through a single mode fiber to establish a narrow spectral width, under-filled non-uniform mode field power distribution in ... | 07/22/2008 |
| 7376293 | Remote location of active section of fiber in a multimode intrusion detection system Intrusion detection of one section only of a multimode fiber uses a light signal launched into the fiber at a location spaced from the source through a single mode fiber to establish a narrow spectral width, under-filled non-uniform mode field power distribution in ... | 05/20/2008 |
| 7373043 | Image detection using multimode fiber amplifier An image detection system includes a multimode fiber amplifier. The multimode fiber amplifier includes a core configured to receive an input image that includes a plurality of input beams spanning a range of incidence angles and to propagate at least some of the inp... | 05/13/2008 |
| 7373042 | Polarization sorter A polarization sorter having an input, an output and a slowly varying region. The input has at least one input waveguide. The input waveguide supports at least one guided TE polarized mode of mode ranking mode-i-TE, and at least one guided TM polarized mode of mode ... | 05/13/2008 |
| 7366416 | Hub for a passive optical network hub A hub for use in a passive optical network (PON) includes a transmission fiber on which an information-bearing optical signal is received, a double-cladded, rare-earth doped fiber located along the transmission fiber for imparting gain to the information-bearing opt... | 04/29/2008 |
| 7366378 | Ultrafast laser machining system and method for forming diffractive structures in optical fibers An ultrafast laser machining system and method to form diffractive structures in optical fibers. The fiber is mounted with its longitudinal axis perpendicular to the beam path of the laser pulses. A region of the fiber is illuminated and then imaged with two cameras... | 04/29/2008 |
| 7366372 | Waveguide device having improved spatial filter configurations An optical waveguide device is provided for receiving light that has a guided mode and an unguided mode. The device comprises an optically transmissive substrate having first and second substantially opposite surfaces, an input end, and an output end. An optical wav... | 04/29/2008 |
| 7356222 | Wavelength selective optical device and method of tuning a wavelength characteristic of the same The invention provides a wavelength selective optical device in which a light emitted from an end surface of a first optical fiber that propagates optical signals with a plurality of multiplexed wavelengths is incident on a first end surface of a first graded index ... | 04/08/2008 |
| 7349596 | System and method to remove light from cladding A system to remove cladding light from an optical fiber that includes a core and a cladding that surrounds the core. A volume of an index-matching material contacts an exterior surface of the cladding along a contact length of the optical fiber. The index-matching m... | 03/25/2008 |
| 7343061 | Integrated photonic amplifier and detector An asymmetric twin waveguide (ATG) structure with an integrated amplifier and detector fabricated in a single active waveguide layer is disclosed. The structure comprises an active waveguide layer formed on a passive waveguide layer. The active and passive waveguide... | 03/11/2008 |
| 7333689 | Photonic integrated devices having reduced absorption loss An asymmetric twin waveguide (ATG) structure with quantum-well intermixing in the taper region of the active waveguide is disclosed. The structure comprises a first waveguide, a second waveguide, and a taper formed in the second waveguide. The taper has an intermixe... | 02/19/2008 |
| 7327910 | Twin waveguide based design for photonic integrated circuits An asymmetric twin waveguide (ATG) structure is disclosed that significantly reduces the negative effects of inter-modal interference in symmetric twin-waveguide structures and which can be effectively used to implement a variety of optical devices. The ATG structur... | 02/05/2008 |
| 7315665 | Liquid-crystal planar-waveguide apparatus and method for fast control of polarization and other properties of light A polarization controller includes a plurality of liquid crystal cells positioned as cladding on a waveguide that propagates a beam of light so that the evanescent field extends into the liquid crystal cells, and a ½-wave birefringent retarder for rotating the eige... | 01/01/2008 |
| 7315667 | Propagating light to be sensed Light to be sensed is spreaded across an entry surface of a transmission structure with a laterally varying energy transmission function. For example, the light could be output from a stimulus-wavelength converter, provided through an optical fiber, or it could come... | 01/01/2008 |
| 7302124 | Twin waveguide based design for photonic integrated circuits An asymmetric twin waveguide (ATG) structure is disclosed that significantly reduces the negative effects of inter-modal interference in symmetric twin-waveguide structures and which can be effectively used to implement a variety of optical devices. The ATG structur... | 11/27/2007 |
| 7289698 | High bitrate transport over multimode fibers A multimode fiber system includes a transmitter for transmitting an optical signal and a receiver that receives the optical signal. At least one mode filter is coupled between the receiver and the transmitter and passes only a specific set of fiber modes from the tr... | 10/30/2007 |
| 7283701 | Optical fiber transmission system with increased effective modal bandwidth transmission A multi-mode optical fiber link is described that includes a single-mode optical fiber having an input that receives an optical signal for transmission through the multi-mode optical fiber link. A first spatial mode converter is coupled to the single-mode optical fi... | 10/16/2007 |
| 7274010 | Semiconductor optical amplifier device amplifying an externally applied light signal, semiconductor optical amplification driving device and semiconductor light receiving apparatus A semiconductor optical amplifier device includes an active layer, an n-type InP substrate, an n-type InP clad layer, a p-type InP clad layer, p-electrodes and n-electrodes. The active layer is made of, e.g., InGaAsP, and includes a saturable absorption region and o... | 09/25/2007 |
| 7269358 | Optical transmitter for increased effective modal bandwidth transmission An optical transmitter for an optical fiber transmission system is described. The optical transmitter includes an optical source that generates an optical signal having a wavelength at an output. An optical intensity modulator modulates the optical signal with an el... | 09/11/2007 |
| 7262435 | Single-transverse-mode laser diode with multi-mode waveguide region and manufacturing method of the same A laser diode with a single-transverse-mode output having a laser cavity comprising both single-mode and multi-mode waveguide portions, and a method of manufacturing such a laser diode are disclosed. There are a pair of single transverse waveguide regions at opposit... | 08/28/2007 |
| 7236671 | Fiber bundles and methods of making fiber bundles The present invention relates to fiber bundles and methods for making fiber bundles. According to one embodiment of the invention, a fused fiber bundle has a terminal section ending with an endface, and includes a plurality of optical fibers, each of the optical fib... | 06/26/2007 |
| 7233725 | 1×N fanout waveguide photodetector A 1×N fanout waveguide detector is disclosed. The detector includes a multiple-mode interference (MMI) cavity with input and output ends. A single-mode waveguide is optically coupled to the input end of the MMI cavity so that the optical power in the guided mode is... | 06/19/2007 |
| 7230963 | Monolithic wavelength stabilized asymmetric laser A monolithic wavelength stabilized system comprises a laser monolithically formed with a waveguide splitter having at least two branches. Non-identical resonators having different wavelengths are operatively coupled to each branch of the splitter and a photodiode is... | 06/12/2007 |
| 7215846 | Mode discriminating on-chip optical coupler for an optical receiver connected to dual mode/multimode fiber A mode coupler structure includes a discriminating structure that discriminates between various incoming modes from an input optical fiber structure. A waveguide structure is coupled to the discriminating structure that couples light not discriminated by the discrim... | 05/08/2007 |
| 7204645 | Apparatus and method for coupling laser energy into small core fibers A fiber optic connector for coupling focused radiant energy from a laser to a fiber optic conductor includes a secondary transmission path and one or more reflectors and/or heat sinks for deflecting errant radiant energy to a location where it be safely dissipated. ... | 04/17/2007 |
| 7203411 | Thermoopic type variable optical attenuator and array type variable optical attentuator using this A thermo optical type variable optical attenuator suitable for application in an array type variable optical attenuator that realizes low crosstalk between neighboring waveguides in the array is provided. A thermo optical type variable optical attenuator 100 ... | 04/10/2007 |
| 7194156 | 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... | 03/20/2007 |
| 7194155 | Adaptive control for mitigating interference in a multimode transmission medium Optical data is processed and transmitted in a multimode transmission medium in a manner that facilitates the mitigation of interference such as that often referred to as intersymbol interference (ISI). According to an example embodiment of the present invention, a ... | 03/20/2007 |
| 7177490 | Optical waveguide, optical device, and method of manufacturing optical waveguide An optical waveguide is formed on a substrate and includes a curved ridge structure, a curved optical path, and a buffer layer. The curved ridge structure is formed on the substrate so as to have a curvature in a longitudinal direction of the curved ridge structure.... | 02/13/2007 |
