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| Number | Title | Issue Date |
| 8150264 | Methods for non-wavelength-converting multi-lane optical switching A method for providing multi-wavelength switching. The method comprising receiving a plurality of signals through at least one input port, and separating the plurality of said signals into at least one wavelength signal set based on wavelengths, wherein a first wave... | 04/03/2012 |
| 8111994 | Balanced bypass circulators and folded universally-balanced interferometers The invention generally relates, in one aspect, to an interferometer system. The interferometer system includes a splitter/combiner element (SCE), a first bi-directional optical path, and a second bi-directional optical path. ... | 02/07/2012 |
| 8045858 | Methods and systems for providing full avionics data services over a single fiber A method for transmission of multiple, independent data packages across a single optical fiber utilizing both time division multiplexing and wavelength division multiplexing is described. The method includes transmitting a first data package across the single optica... | 10/25/2011 |
| 8032027 | Wide free-spectral-range, widely tunable and hitless-switchable optical channel add-drop filters Optical devices extending the free spectral range and tunability of, and enabling hitless switching of, integrated optical filters suitable for add-drop filters. Devices include (i) a splitter device configured to split an input spectrum among a plurality of output ... | 10/04/2011 |
| 7995922 | Wave division multiplexing replacement of serialization A WDM system is used to transfer bytes of data between keyboard, display and camera portions of a hand held device. The data signals are converted into light wavelengths via lasers or LEDs of differing wavelengths and transported over an optical fiber cable. Mems de... | 08/09/2011 |
| 7995923 | Controllable optical multiplexer An inventive controllable optical multiplexer for control of multiplexing channels in a fiber-optic communication system provided with 2N of wavelength-division multiplexing channels, whose optical frequencies are re-tunable at a constant wavelength shift... | 08/09/2011 |
| 7991289 | High bandwidth communication system and method A communication system (20) includes a transmitter (22) with (i) a transmitter photonic crystal (30) having a waveguide (40) and multiple cavities (42, 44, and 46) spaced along the waveguide (40); (ii) a light source ... | 08/02/2011 |
| 7974533 | Long reach optical network An optical network is provided including a first optical network section operatively coupled to a carrier facility configured to transmit traffic onto channels in the first optical network section. A second optical network section may be operatively coupled to the f... | 07/05/2011 |
| 7907844 | Method and apparatus for hitless routing of optical signals in an optical transport network A method is provided for routing optical signals in an optical transport network. The method includes: separating an incoming optical multiplexed signal having a plurality of wavelength-channels embodied therein into two or more channel groups, where each channel gr... | 03/15/2011 |
| 7783198 | Passive optical network A passive optical network includes: a central office for generating multiplexed downstream optical signals and receiving an upstream optical signal; a plurality of optical network units for receiving a corresponding downstream optical signal and generating subcarrie... | 08/24/2010 |
| 7769295 | Dual beam splitter optical micro-components and systems and methods employing same A micro-optic dual beam-splitter assembly comprises at least two beam-splitter optical filters and at least one photoreceptor. Each of the beam-splitter optical filters comprises an optical substrate having at least a coated or uncoated optical tap surface and a fil... | 08/03/2010 |
| 7742700 | Topologically multiplexed optical data communication Systems and methods for encoding information in the topology of superpositions of helical modes of light, and retrieving information from each of the superposed modes individually or in parallel. These methods can be applied to beams of light that already carry info... | 06/22/2010 |
| 7715720 | Coherent optical detector and coherent communication system and method An optical device is provided with first and second inputs. A first coupler coupled is coupled to the first input and produces at least a first and second output. A second coupler is coupled to the second input and produces at least a first and second output. A thir... | 05/11/2010 |
| 7657179 | 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... | 02/02/2010 |
| 7623787 | Wavelength division multiplexing transmission apparatus using a multiple wavelength light source One of two optical fibers connecting communication stations is used for transmitting multiple wavelength light supplied from a multiple wavelength light source supply apparatus, and the other for a bidirectional communication using optical signals of respective wave... | 11/24/2009 |
| 7623788 | Optical wavelength division multiplexing transmitter An optical transmitter for coupling and wavelength-multiplexing optical signals with a different wavelength has 3 or more light sources for emitting parallel optical signals with a different wavelength, and 2 kinds of optical components with a different optical sign... | 11/24/2009 |
| 7613398 | Wavelength-tunable light source and wavelength-division multiplexed transmission system using the source The present invention relates to a wavelength-tunable light source whose output wavelength can be externally controlled and a wavelength-division multiplexed transmission system using the source. A wavelength-tunable light source in accordance with the presen... | 11/03/2009 |
| 7587137 | System and method for seamless integration of CWDM and DWDM technologies on a fiber optics infrastructure The present invention provides a system and method for multiplexing DWDM channels on top existing CWDM infrastructure. An erbium-doped fiber amplifier amplifies DWDM signals in the DWDM domain to compensate for 10 G optics power budget limitations without blocking t... | 09/08/2009 |
| 7587138 | Broadband 2Ć2 optical splitter An optical device containing a four-port optical mixer capable of distributing the optical power presented at either or both of two input ports to specified ratios in two output ports. ... | 09/08/2009 |
| 7551855 | D(WDM) communications network employing periodic spectral multiplex processing A WDM network (R) comprises an optical fiber (F) connected to a hub (H) via an input of a demultiplexer (DX) having N outputs to communications stations (Si-Sn) able to deliver and/or receive spectral multiplexes of modulated optical signals wi... | 06/23/2009 |
| 7546037 | Topologically multiplexed optical data communication Systems and methods for encoding information in the topology of superpositions of helical modes of light, and retrieving information from each of the superposed modes individually or in parallel. These methods can be applied to beams of light that already carry info... | 06/09/2009 |
| 7539418 | Integrated ring modulator array WDM transceiver A system that facilitates optical multiplexing and demultiplexing. The system includes an optical transmitter which is structured in the following way. A wavelength-splitting mechanism is coupled to the optical transmitter, which separates the wavelengths of light o... | 05/26/2009 |
| 7519296 | Optical demultiplexing method and optical multiplexing method, and optical transmission apparatus using same According to the present invention, for example, a WDM light containing 10 Gbit/s signal lights and 40 Gbit/s signal light arranged on wavelength grids at 25 GHz intervals is branched into two by an input side optical coupler to be sent to two routes. In one route s... | 04/14/2009 |
| 7454142 | Data transmission method and data transmission apparatus A data transmission method and apparatus is disclosed by which bidirectional transmission of a plurality of optical signals obtained by conversion of a plurality of serial digital data can be achieved efficiently using a single common optical signal transmission cab... | 11/18/2008 |
| 7447433 | Optical communication device An optical communication device enabling confirmation of frames flowing through a communication line without affecting such line. The optical communication device includes a first conversion unit that converts a first optical signal transmitting a first frame group ... | 11/04/2008 |
| 7444055 | Integrated optics arrangement for wavelength (De)multiplexing in a multi-grade vertical stack The invention describes an integrated-photonics arrangement, implementable in a multi-guide vertical integration structure composed from III-V semiconductors and grown in one epitaxial growth run, that allows for vertical and lateral splitting of optical signals co-... | 10/28/2008 |
| 7444047 | Multiplexing optical system A multiplexing optical system includes collimator lenses, a first condensing lens, a second condensing lens and an optical fiber. The collimator lenses collimate divergent laser beams that have been emitted from semiconductor lasers. The first condensing lens conden... | 10/28/2008 |
| 7440701 | Fiber-to-the-premise optical communication system An optical communication system includes a first wavelength filter, a bidirectional amplifier, and a second wavelength filter. The first wavelength filter can receive a downstream broad-spectrum signal and output a downstream spectrum-sliced signal in response to th... | 10/21/2008 |
| 7440169 | Method for amplifying a time-varying optical signal and optical amplification unit A method for amplifying a time-varying optical signal comprising the steps of: generating an auxiliary optical signal the amplitude of which is chosen to be complementary to at least the envelope of the amplitude of the optical signal, superimposing the auxiliary op... | 10/21/2008 |
| 7437074 | Wavelength division multiplexing transmission system A WDM transmission system is provided which can multiplex/demultiplex and transmit wavelength division multiplexing signals, where signal lights have a different signal bandwidth, in a status without much deterioration of transmission quality. In the WDM transmissio... | 10/14/2008 |
| 7437075 | Integrated reconfigurable optical add/drop multiplexer An integrated reconfigurable planar lightwave add-drop (RPLAD) multiplexer for use in a WDM optical communication system is arranged such that each drop port can receive any wavelength channel and each add port can transmit on any wavelength channel. Drop port recon... | 10/14/2008 |
| 7437083 | Wavelength converter A wavelength converter for binary optical signals includes an interferometer structure (110) for generating an output signal by modulating a received local signal (LS) according to the modulation of a fUrther received first input signal (IS 1). When su... | 10/14/2008 |
| 7426347 | Shared optical performance monitoring An apparatus for shared optical performance monitoring (OPM) is provided. A wavelength sensitive device receives light at an input port and routes it wavelength selectively to a set of output ports. To perform optical performance monitoring on the output ports, a mo... | 09/16/2008 |
| 7421168 | Integrated optical channelizer A signal channelizer (10) includes an input waveguide (14) carrying an inputted signal (20) having a plurality of wavelengths. The input waveguide (14) has an input port (22) for receiving the inputted signal (20). A plurali... | 09/02/2008 |
| 7421203 | Method for transmitting packet in wireless access network based on wavelength identification code scheme A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the ānā is a positive integer, and a... | 09/02/2008 |
| 7412171 | Optical ring network architecture An optical ring network architecture including a number (N) of multi-add/drop filters, such as filters formed using symmetrical pairs of frequency routers. Each multi-add/drop filter is coupled to two other multi-add/drop filters using Nā2 transmission media, such... | 08/12/2008 |
| 7409157 | Optical switch The present invention provides an optical switch in which a switching operation is not affected even when the polarization state of a control light varies. The optical switch includes a loop-form optical waveguide loop circuit formed from an optical nonlinear medium... | 08/05/2008 |
| 7408701 | Multi-frequency light source A multi-frequency light producing method and apparatus multiplies the number of optical channels present in an incident wavelength division multiplexed (WDM) signal light source by four-wave mixing (FWM) the WDM signal with at least one pump lightwave at least one t... | 08/05/2008 |
| 7406221 | Two-dimensional photonic crystal multiplexer/demultiplexer An object of the present invention is to provide a multiplexer/demultiplexer capable of preventing a decrease in multiplexing/demultiplexing efficiency due to an error in wavelength or due to a crosstalk with other wavelengths. A two-dimensional photonic crystal hav... | 07/29/2008 |
| 7403712 | Matrix time division multiplex (MTDM) interrogation Embodiments of present system encompass: a plurality of laser sources that produce a plurality of respectively different optical wavelengths; a matrix switch having a plurality of inputs operatively coupled to the plurality of laser sources, each of the plurality of... | 07/22/2008 |
