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| Number | Title | Issue Date |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 7343094 | Transmission characteristics evaluation system and pseudo transmission path apparatus thereof A transmission characteristics evaluation system can measure the dispersion tolerance and the insertion loss gradient tolerance at a high precision with reduced number of working steps for the measurement in evaluating the transmission characteristics of an optical ... | 03/11/2008 |
| 7302181 | Single lens multiple light source device An optical communication device having multiple light sources under a single lens. The optical communication device has two light sources. The optical communication device has a lens optically coupled to the two light sources. The lens is shaped to direct light from... | 11/27/2007 |
| 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 |
| 7280760 | Upgradeable optical add/drop multiplexer An OADM includes optical input and output; first and second bandpass filters with a first pass band, optically coupled to the optical input and output, respectively; third and fourth bandpass filters with a second pass band, optically coupled to reflection ports of ... | 10/09/2007 |
| 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 |
| 7228025 | Thin film interleaver A thin film interleaver device is disclosed. The thin film interleaver includes thin film optics. The thin film(s) are formed such that they reflect one group of wavelengths while allowing a second group of wavelengths to pass through the thin film(s). The thin film... | 06/05/2007 |
| 7218813 | Optical communication system An optical communication system has a plastic optical fiber (POF) and an optical communication module. The POF has a spherical end surface, and light emitted from the spherical end surface has an NA of 0.35 or lower. The POF is installed in the module such that a li... | 05/15/2007 |
| 7215885 | Wavelength division element and optical module A wavelength division element includes a first filter and a second filter. The first filter has incident angle-to-transmission wavelength characteristics and separates multiplexed lights in a plurality of wavelength bands into first lights that are in a first wavele... | 05/08/2007 |
| 7203421 | Littrow grating based OADM A multi-channel optical switching system particularly usable as a programmable optical add/drop multiplexer in a multi-wavelength communication system. The switching system uses a grating operating at Littrow that separates a multi-channel optical signal into a plur... | 04/10/2007 |
| 7194160 | Filter module A filter module includes a first optical fiber collimator, a second optical fiber collimator, and a filter located between the first and second optical fiber collimators. The first optical fiber collimator includes a first optical fiber, a first optical fiber chip f... | 03/20/2007 |
| 7182528 | Diffractive grating member and optical communication module The present invention relates to a diffractive grating member and to an optical communication module. The optical communication module includes a semiconductor laser; a coupling optical system for coupling a light flux with a wavelength of λ1 emitted by the ... | 02/27/2007 |
| 7184669 | Optical transceiver systems and methods Optical systems are provided. A representative optical system includes an optical transceiver with an optical source and an optical receiver. The system also includes an optical waveguide. At least one of the optical source and the optical receiver is optically coup... | 02/27/2007 |
| 7170444 | Non-linear dispersive pulse generator A non-linear dispersive pulse generator for producing pulsed radio frequency electrical signals includes a non-linear dispersive electrical circuit (1) incorporating at least one non-linear element (2) made of a material sensitive to low power signals ... | 01/30/2007 |
| 7171073 | Structure and method for multi-ports optical apparatus The present invention describes a structure and method for a multi-ports WDM device for compensating the filter distortion while reducing insertion loss. The multi-ports WDM device comprises a 4-fiber collimator having a grin lens and a 2-fiber collimator having a l... | 01/30/2007 |
| 7164859 | Free-space dynamic wavelength routing systems with interleaved channels for enhanced performance A novel wavelength routing apparatus is disclosed, which uses a diffraction grating to separate a multi-wavelength optical signal from an input port into multiple spectral channels; a channel-interleaving assembly (e.g., an array of prisms) to interleave the spectra... | 01/16/2007 |
| 7126740 | Multifunctional optical device having a spatial light modulator with an array of micromirrors A reconfigurable multifunctional optical device has an optical arrangement for receiving an optical signal, each having optical bands or channels, and a spatial light modulator for reflecting the at least one optical signal provided thereon. The optical arrangement ... | 10/24/2006 |
| 7113704 | Tunable add/drop node for optical network An input port of an add/drop node receives a plurality of optical channels. An add/drop port transmits a first drop channel of the plurality of channels when in a first channel mode and a second drop channel of the plurality of optical channels during a second chann... | 09/26/2006 |
| 7088885 | System for modulating optical signals An optical signal production and modulation system that enables a multiplexed optical signal to be created for transmission without the use of more traditional laser-based optical transceivers. The system includes a light source library and a plurality of modulating... | 08/08/2006 |
| 7076132 | Optical devices and methods A fiber optic device comprises an optical lens element having a focal length greater than 2 mm, and an optical signal source or receiver mounted at the focal plane of the optical lens element and operative to communicate optical signals with a selectively transparen... | 07/11/2006 |
| 7062174 | Wavelength division multiplexing add-drop multiplexer using an optical tapped delay line An Optical Tapped Delay Line (OTDL) is combined with other known optical apparatuses to provide an add-drop multiplexer for a wavelength division multiplexing fiber optic network. Each output beam of the OTDL is spatially distinguishable in free space. This waveleng... | 06/13/2006 |
| 7054520 | Planar array optical switch and method An optical switch device includes a first array (20) of reflectors (22), each associated with a separate optical fiber input (12), and a second array (30) of reflectors (32), each associated with a separate fiber output (14)... | 05/30/2006 |
| 7046876 | Interleaver for optical communication system Disclosed is an interleaver for an optical communication system. A dual collimator is combined with a first optical fiber acting as a light input port and one end of a second optical fiber spaced from the first optical fiber, and switches light advancing along the f... | 05/16/2006 |
| 7031609 | Optical add-drop multiplexer An optical add-drop multiplexer successively comprises a first ferrule, a first graded index (GRIN) lens with a bandpass filter attached thereon, an optical crystal, a second GRIN lens, and a second ferrule. An input and an output optical fiber are stationed in the ... | 04/18/2006 |
| 7031611 | Optical routers using angular position amplification modules An optical routing device for coupling each of a plurality NE of optical incoming channels (1) to one of a plurality NS of optical output channels (5) and for orienting each of the optical beams coming through the incoming channel... | 04/18/2006 |
| 7004645 | VCSEL array configuration for a parallel WDM transmitter VCSEL array configurations for use with parallel WDM transmitters are disclosed. Transmitters that use several wavelengths of VCSELs are built up out of multiple die to avoid the difficulty of manufacturing monolithic arrays of VCSELs with different optical waveleng... | 02/28/2006 |
| 6985308 | Telecommunications optical processor A demultiplexer for use in a wavelength-division multiplexed optical system including a first positive lens group, a negative lens group, and a second positive lens group in order from a dispersive element and a reflective element. In some embodiments the reflective... | 01/10/2006 |
| 6945711 | Multiplexer with a dense wavelength division multiplexing function This invention relates to a multiplexer with a DWDM function, mainly comprising two modules, and an optic fiber is linked between said two modules, in which several filters and reflection mirrors, inclined slabs, laser diodes, receiver, and optical detectors detecti... | 09/20/2005 |
| 6941073 | East-west separable ROADM An East-West separable ROADM particularly usable as a programmable N×M optical add/drop multiplexer with an efficient pass through of optical channels in a multi-wavelength communication system. The East-West separable ROADM uses a grating that separates multi-chan... | 09/06/2005 |
| 6941047 | System and method for collimating and redirecting beams in a fiber optic system A connector to an optical fiber comprises a prism, a ferrule and an aspheric lens. The prism includes a triangular wedge element having a first surface, a second surface and a base. The ferrule guides the optical fiber so as to contact the optical fiber with the fir... | 09/06/2005 |
| 6925212 | Optical transmission apparatuses, methods, and systems Apparatuses, methods, and systems are disclosed for controlling optical signal wavelength spacing by providing for simultaneous upconversion of a plurality of electrical signal on subcarrier frequencies of an optical carrier frequency with or without modulation of a... | 08/02/2005 |
| 6909821 | Network for distributing signals to a plurality of users A network for distributing signals to a plurality of user apparatuses having a distribution unit with a plurality of ports, and a plurality of optical-fiber cables connected to the ports and suitable to make the plurality of ports of the distribution unit communicat... | 06/21/2005 |
| 6907162 | Optical module unit and optical module employing the optical module unit An optical module 31 is provided in which a wavelength division element 32 such as an optical multi-layer film or diffraction grating is united between the sides of lens blocks 3 of optical module units 1 and 6 opposed to optical f... | 06/14/2005 |
| 6871022 | Cascaded optical multiplexer Methods and apparatus for multiplexing and demultiplexing optical signals. An interleaver having a modified Mach-Zehnder interferometer as a first stage is used as a wavelength division multiplexer. This first stage is combined with one or more cascaded stages, each... | 03/22/2005 |
| 6868237 | Terrestrial optical communication network of integrated fiber and free-space links which requires no electro-optical conversion between links Optical signals are received from a free-space link by directing received light onto a plurality of microlenses and then directing light received through each of the microlenses into a respective single mode optical fiber (SMF). Light beams from the SMFs are combine... | 03/15/2005 |
