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| Number | Title | Issue Date |
| 7835646 | High-order Bragg fiber dispersion correction The present invention generally concerns the use of Bragg optical fibers in chirped pulse amplification systems for the production of high-pulse-energy ultrashort optical pulses. A gas-core Bragg optical fiber waveguide can be advantageously used in such systems to ... | 11/16/2010 |
| 7424226 | Optical code division multiplexing communication method and system An optical code division multiplexing communication method includes the steps of: producing a multi-wavelength optical pulse train from wavelength multiplexing pulse; transmitting the multi-wavelength optical pulse train through a transmission line using a time-spre... | 09/09/2008 |
| 7398021 | Optical transmitter and passive optical network using the same An optical transmitter including a multi-lambda source to output injection light consisting of a plurality of injection wavelengths in channels, a circulator having a first port, a second port, and a third port, the circulator receiving the injection light at the fi... | 07/08/2008 |
| 7394986 | Flat top optical filtering component The invention relates to wavelength-selective optical filters for allowing light of a narrow optical spectral band, centered around a wavelength (λc) to pass through them, while reflecting the wavelengths lying outside this band. According to the inventi... | 07/01/2008 |
| 7389048 | Optical wavelength-division multiple access system and optical network unit The present invention provides an optical wavelength-division multiple access system and a corresponding optical network unit. A wavelength band Da (wavelengths λd1 to λdn) for downlink optical signals corresponding to the n ONUs, a wavelength band Ua (wave... | 06/17/2008 |
| 7389047 | Optical ring transmission network The network comprises an optical ring link (F) and a concentrator (HUB) that sends via one end of the link “downlink” optical signals carried by respective wavelengths and receives “uplink” optical signals via the other end of the link. The link is divided i... | 06/17/2008 |
| 7385761 | Diffraction grating device and optical apparatus A diffraction grating device for splitting or coupling light beams permits the divergence of the light beams to be minimized easily. A first light beam is incident on a diffraction grating from the side thereof facing the inside of the device, and a second light bea... | 06/10/2008 |
| 7373039 | Low-ripple optical device A low-ripple optical device comprising an optical demultiplexer structure and an optical multiplexer structure cascaded together wherein one of the structures exhibits n passband maxima and the other device exhibits n+1 passband maxima. ... | 05/13/2008 |
| 7356259 | Optical bypass upgrade configuration Optical bypass node upgrade configurations are disclosed: (1) a configuration where optical taps are pre-positioned in wavelength division multiplex (WDM) line systems terminating at optical-electrical-optical (OEO) core switching nodes to allow for future upgrade o... | 04/08/2008 |
| 7352928 | Tunable optical add/drop multiplexer The tunable add/drop multiplexer including a tiltable mirror, a fixed thin film filter, and first and second retro-reflector elements for redirecting express channels back out an input/output port and for redirecting drop channels back out an add/drop port, respecti... | 04/01/2008 |
| 7340175 | Non-uniform optical waveband aggregator and deaggregator and hierarchical hybrid optical cross-connect system Hierarchical hybrid optical networking is based on balancing cost and performance of optical networks by providing transparent (optical) switching of subsets of wavelengths in addition to opaque (electrical) switching of individual light paths. Effective use of wave... | 03/04/2008 |
| 7333729 | Optical transmitter, optical receiver and optical transmission system using same To resolve problems, with the invention, an optical transmitter comprises an encoder for generating an optical signal obtained by encoding multi-wavelength pulses corresponding to sending data by use of a method of time spread/wavelength hopping in accordance with a... | 02/19/2008 |
| 7330658 | Device and method for optical add/drop multiplexing An optical add/drop multiplexing (OADM) device includes two MMI structures connected by a MI/MZI waveguide structure comprising a wavelength selector that includes phase shifted Bragg gratings. The OADM multiplexer transmits a wavelength channel selected in advance ... | 02/12/2008 |
| 7321704 | Wavelength cross connect with per port performance characteristics A wavelength cross connect is provided in which there is a dispersive arrangement per port for each input port and each output port. Some of the dispersive arrangements have differing characteristics so as to result in different performances at the ports. The disper... | 01/22/2008 |
| 7321466 | High dispersion diffraction grating including multiple holographic optical elements A diffraction grating having multiple holographic optical elements (HOEs), including a Dickson grating and at least one other volume phase grating (VPG). In typical embodiments, the multi-HOE grating is implemented to provide high dispersion, at least substantially ... | 01/22/2008 |
| 7317875 | Optical communication network system, wavelength routing apparatus, communication node, optical path managing method for use in optical cross connect apparatus, and apparatus for that method An optical communication network system and a wavelength-routing device and a communication node therefor are provided which can easily increase the optical paths between communication nodes, which are capable of expanding transmission capacity, and which excel in f... | 01/08/2008 |
| 7302179 | Optical performance monitor using co-located switchable fiber bragg grating array The present invention provides methods and devices for optical performance monitoring using co-located switchable fiber Bragg gratings (FBGs) in conjunction with a few detectors. This arrangement combines the merit of both tunable FBG filters and discrete detectors ... | 11/27/2007 |
| 7298976 | Bi-directional optical cross-connect device Disclosed is an optical cross-connect device for communication between first and second optical networks communicating with each other using forward and backward optical signals each including of a plurality of channels. The device includes a first circulating part ... | 11/20/2007 |
| 7295738 | System and method for performing dispersion compensation An exemplary embodiment of the present invention includes an optical circulator. The circulator may have, for example, a first port, a second port, and a third port. The first port may be configured to introduce light into the optical circulator. The system may also... | 11/13/2007 |
| 7292755 | Optical resonator formed in a planar optical waveguide with a distributed optical structure An optical apparatus comprises a planar optical waveguide having at least two reflectors. The planar optical waveguide substantially confines in at least one transverse spatial dimension optical signals propagating therein, and the reflectors define an optical reson... | 11/06/2007 |
| 7292786 | Method and system for a re-configurable optical multiplexer, de-multiplexer and optical add-drop multiplexer A system for a re-configurable optical de-multiplexer, multiplexer or add/drop multiplexer is provided. A re-configurable de-multiplexer system comprises a wavelength selective switch having an input port, an output port and an internal port; a wavelength division d... | 11/06/2007 |
| 7292787 | Selected-wavelength tuning filter and optical add/drop multiplexer The present invention relates to the selected-wavelength tuning apparatus which is provided with an AOTF, a radio-frequency signal generator, an optical detector, and a controller for detecting lights emitted from the AOTF with the optical detector and for controlli... | 11/06/2007 |
| 7286732 | Distributed optical structures designed by computed interference between simulated optical signals An optical apparatus comprises a planar optical waveguide and at least one set of diffractive elements formed in or on the waveguide. The waveguide is arranged to confine propagating optical signals in at least one transverse dimension. The diffractive element set c... | 10/23/2007 |
| 7286764 | Reconfigurable modulator-based optical add-and-drop multiplexer An optical add and drop multiplexer system comprising a first module for providing a first signal; a second module for providing a second signal; and a modulator for receiving a channel of the first signal at a first location, the first location configured to actuat... | 10/23/2007 |
| 7286763 | Optical add/drop multiplexer having a banded channel configuration An optical add/drop multiplexer (OADM) adapted to route optical signals having at least two different bit rates. The OADM has at least two sets of DWDM channels, e.g., with channels in a first set having a first bandwidth value suitable for the transmission of 10-Gb... | 10/23/2007 |
| 7280761 | Device and method for setting add signal level for OADM system An optical level calculator calculates optical powers of individual wavelengths of a through wavelength division multiplexed signal based on an input level monitor, network information, and insertion loss information 5, and obtains an optimum level for an add... | 10/09/2007 |
| 7277640 | Optical add/drop multiplexing systems The present invention overcomes problems associated with switch isolation, noise and crosstalk suppression, insertion loss, spurious reflections, wavelength tolerance, and compactness that are present in varying degrees in other add/drop systems. The present inventi... | 10/02/2007 |
| 7277607 | Optical multiplexer/demultiplexer, optical device, and optical transmission system An optical system 111 collimates wavelength components of wavelengths λ1-λ3 emerging from an end face of optical fiber 11, a diffraction grating 121 separates them by wavelength, and an optical system 112 condenses them. T... | 10/02/2007 |
| 7268927 | Tunable optical filter array and method of use According to an exemplary embodiment of the present invention, an optical apparatus includes an optical filter array which comprises a plurality of optical filter elements, wherein at least one of the optical filter elements is adapted for tuning to two or more wave... | 09/11/2007 |
| 7266299 | Add/drop-drop and continue-module and drop and continue module A tunable add/drop&continue or drop&continue module comprises two optical filters where at least one is tunable and that are arranged following one another between a branching unit for optical signals and an insertion unit follow a branching unit for optical signals... | 09/04/2007 |
| 7263291 | Wavelength division multiplexing source using multifunctional filters This invention provides a system that combines a wavelength multiplexer with an FM discriminator for chirp reduction and wavelength locker in a filter to produce a wavelength division multiplexed signal with reduced chirp. A partially frequency modulation laser sign... | 08/28/2007 |
| 7263252 | Optical switch and method of controlling optical switch An optical switch of the present invention includes at least one input optical fiber, output optical fibers, at least one movable mirror for directing a light beam from the input optical fiber selectively to one of the output optical fibers, and at least one shutter... | 08/28/2007 |
| 7254293 | Wavelength routing optical switch An optical switch for routing arbitrary wavelengths between optical fibers in optical networks. The optical switch may include a highly wavelength dispersive element together with a spatially dispersive element to separate the wavelengths. Broadband switch inputs an... | 08/07/2007 |
| 7236704 | Optical add/drop multiplexer utilizing variable optical attenuator A switchless optical add/drop module (OADM) includes: a first variable optical splitter (VOS) for splitting a composite optical signal including a plurality of channels into a first portion and a second portion; a first multi-channel variable optical attenuator (MCV... | 06/26/2007 |
| 7233442 | Method and apparatus for spectral-beam combining of high-power fiber lasers Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate p... | 06/19/2007 |
| 7231149 | Bidirectional optical add-drop multiplexer A bidirectional optical add-drop multiplexer adds and drops optical signals having specific wavelengths among the WDM optical signals transmitted bidirectionally through one of the optical transmission lines connected between neighbor nodes in a bidirectional WDM ri... | 06/12/2007 |
| 7231150 | Method and apparatus for sensing a temperature along an optical path in semiconductor material A temperature sensing and control method and apparatus. In one aspect of the present invention, an apparatus according to the teachings of the present invention includes an optical path disposed in semiconductor material. A four-terminal resistor is defined in the s... | 06/12/2007 |
| 7228030 | Method and apparatus providing an output coupler for an optical beam An optical output coupler having a reflector integrated in an evanescent coupler. In one aspect of the present invention, an apparatus according to an embodiment of the present invention includes first and second optical paths. An optical beam is to be directed thro... | 06/05/2007 |
| 7228031 | Method and apparatus providing an output coupler for an optical beam An optical output coupler having a reflector integrated in an evanescent coupler. In one aspect of the present invention, an apparatus according to an embodiment of the present invention includes first and second optical paths. An optical beam is to be directed thro... | 06/05/2007 |
| 7224867 | Holographic spectral filter Method and apparatus are contemplated for receiving from an input, an optical signal in a volume hologram comprising a transfer function that may comprise temporal or spectral information, and spatial transformation information; diffracting the optical signal; and t... | 05/29/2007 |
