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| Number | Title | Issue Date |
| 8111996 | Compact optical multiplexer and demultiplexer Consistent with the present disclosure, an arrayed waveguide grating (AWG) is provided that includes first inputs and second inputs. Each of the first inputs receives a corresponding one of a plurality of first optical signals, each of which has a corresponding one ... | 02/07/2012 |
| 7463828 | Optical channel monitor An optical channel monitor is provided that sequentially or selectively filters an optical channel(s) 11 of light from a (WDM) optical input signal 12 and senses predetermined parameters of the each filtered optical signal (e.g., channel power, channel... | 12/09/2008 |
| 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 |
| 7372607 | Apparatus for reducing drops in a transmission spectrum due to inter-pixel gaps The invention includes an apparatus for modulating an optical signal. The apparatus includes a spatial dispersion mechanism and a modulating mechanism. The spatial dispersion mechanism spatially disperses the optical signal. The spatially dispersed optical signal ha... | 05/13/2008 |
| 7362930 | Reduction of MEMS mirror edge diffraction in a wavelength selective switch using servo-based rotation about multiple non-orthogonal axes Effects of diffraction of a spectral beam from an edge of the micromirrors are reduced in order to optimize the passband in a wavelength selective switch. The effects of diffraction on the pass band may be reduced by using rotation of the micromirror about both the ... | 04/22/2008 |
| 7362931 | Optical conversion device for shared FTTH distribution network An optical conversion device for a shared FTTH distribution network including first and second optical fibers and an optical processing circuit. The optical processing circuit has an input for receiving a first optical analog signal carried by the first optical fibe... | 04/22/2008 |
| 7359051 | Multiple-wavelength spectroscopic apparatus In a multi-wavelength spectroscopic apparatus using diffraction gratings, a first diffraction grating is a diffraction grating with diffraction efficiencies of p-polarized light and s-polarized light being equal on a short wavelength side of an operating wavelength ... | 04/15/2008 |
| 7356256 | Digital performance monitoring for an optical communications system A digital performance monitoring method and system for an optical communications system utilizes a channel monitor and a digital signal processor (DSP). The channel monitor is designed to monitor a respective channel signal of the optical communications system, and ... | 04/08/2008 |
| 7352968 | Chirped managed, wavelength multiplexed, directly modulated sources using an arrayed waveguide grating (AWG) as multi-wavelength discriminator There is provided a fiber optic system comprising: a multi-wavelength source adapted to generate frequency modulated signals having different wavelengths, λ1, λ2, . . . , λn; and | 04/01/2008 |
| 7352927 | Optical add-drop multiplexer architecture with reduced effect of mirror edge diffraction Effects of diffraction of a spectral beam from an edge of the micromirrors are reduced in order to optimize the passband in a wavelength selective switch. The effects of diffraction on the pass band may be reduced by appropriate modification of the edges of the micr... | 04/01/2008 |
| 7349089 | High transmission multi-wavelength filter and method An optical arrangement and method of filtering include a beam splitter that accepts an incident beam and transmits light from the incident beam of a first polarization and reflects light from the incident beam of a second polarization. The transmitted light is a fir... | 03/25/2008 |
| 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 |
| 7330663 | PMD-reduction processing for a multi-channel receiver A multi-channel (e.g. WDM) receiver, in which l PMD compensators are time-shared by n (n>1) communication channels, where 1≦l≦n−1. The receiver implements PMD monitoring to identify channels exhibiting relatively high amounts of PMD. Some or all of the identif... | 02/12/2008 |
| 7330659 | Wavelength filter that operates on sets of wavelength channels A wavelength filter, for filtering a WDM signal, comprises a demultiplexer, a multiplexer, and a control array connecting the demultiplexer and the multiplexer, where the demultiplexer and the multiplexer have a free spectral range (FSR) smaller than their wavelengt... | 02/12/2008 |
| 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 |
| 7315668 | Optical coupling with a test port An optical coupler comprises a first, second, third, and fourth port. The first port is for communicating optical signals with a processor. The second port receives a first optical signal and transmits the first optical signal to the first port. The third port recei... | 01/01/2008 |
| 7315697 | Light source for generating an output signal having spaced apart frequencies A multiple wavelength light source generates an output signal having a comb of accurately spaced apart frequencies with variable free spectral range in the C-band of optical fiber communication. The light source employs an electro-optical modulator (EOM) driven by a... | 01/01/2008 |
| 7305155 | Optical element and wavelength separator using the same A wavelength separator includes a one-dimensional photonic crystal structure formed by providing a plurality of grooves in parallel with one another at uniform intervals in a homogeneous medium, and has an incident end face formed obliquely with respect to a directi... | 12/04/2007 |
| 7305185 | Device for integrating demultiplexing and optical channel monitoring A method for integrating power monitoring capabilities with passive demultiplexing operations, utilizing the high-order diffraction from an optical diffraction grating. The technique helps avoid insertion loss and polarization dependent loss penalties, and device si... | 12/04/2007 |
| 7302138 | Arrayed waveguide grating device The present invention comprises an arrayed waveguide grating member, a taper multimode interference coupler and a taper optical attenuator to uniform and flatten a passband in an optical device. ... | 11/27/2007 |
| 7300216 | Optical connector adapter for interfacing a beam splitter/combiner to optical waveguides and method of forming the same An optical connector adapter includes a substrate having at least one optical waveguide for transporting optical signals. The substrate includes opposing ends, a top reference surface and side reference surface aligned relative to the at least one optical waveguide.... | 11/27/2007 |
| 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 |
| 7298540 | Equalizing optical wavelength routers A dynamic equalizing optical channel router includes an input port for receiving a wavelength division multiplexed composite optical signal comprising a plurality of channels; at least one output port; a diffraction grating optically coupled to the input and output ... | 11/20/2007 |
| 7295780 | Apparatus for detecting peaks of wavelength-division-multiplexed light, and apparatus for controlling said light Disclosed is an apparatus for controlling wavelength-division-multiplexed light wherein overall power of wavelength-division-multiplexed light is rendered constant through control for uniformalizing the level of only one wave of maximum power, and wherein the levels... | 11/13/2007 |
| 7295783 | Digital optical network architecture A digital optical network (DON) is a new approach to low-cost, more compact optical transmitter modules and optical receiver modules for deployment in optical transport networks (OTNs). One important aspect of a digital optical network is the incorporation in these ... | 11/13/2007 |
| 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 |
| 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 |
| 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 |
| 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 |
| 7269312 | Bipolar RF-photonic transversal filter with dynamically reconfigurable passbands An architecture that enables one to realize a FIR transversal filter with apodized, interlaced bipolar tap coefficients (an). The tap coefficients, an, are varied via the control of the optical powers emitted by an array of WDM laser sources. A... | 09/11/2007 |
| 7262898 | Apparatus for reducing drops in a transmission spectrum due to inter-pixel gaps The invention includes an apparatus for modulating an optical signal. The apparatus includes a modulating mechanism comprising a plurality of modulating component arrays, each modulating component array comprising a plurality of modulating components, wherein adjace... | 08/28/2007 |
| 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 |
| 7260655 | Optical routing using star switching fabric with reduced effective switching time In one embodiment, a router includes a star switching fabric operable to receive a plurality of optical signals each having a wavelength and each associated with a payload received by the router and to communicate from the switching fabric a plurality of substantial... | 08/21/2007 |
