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7620320 |
Fibre selective control switch system
The present invention is directed to a Fiber Selective Control Switch system for simulating human intervention during a test process for fiber network environments. The Fiber Selective Control...
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7616848 |
Optical transmission apparatus
In an optical transmission apparatus, optical power of each of wavelength contained in a wavelength multiplexing signal is measured, a measured value of the optical power of each wavelength is...
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7613396 |
Multiplexing communication system and crosstalk elimination method
In a system where a quantum channel and a classical channel are multiplexed on a single optical transmission line and information is transmitted from a transmitter to a receiver through the quantum...
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7590350 |
System and method for automated engineering of optical networks
A computerized method for modifying an optical wavelength division multiplexing (WDM) network is described. The method includes providing an initial configuration of the optical WDM network. At...
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7590102 |
Multi-stage packet switching system
In general, in one aspect, the disclosure describes a multi-stage switch having at least one ingress switch module to receive data and to generate frames that are transmitted as a wavelength...
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7576846 |
Apparatus and method of non-sampling-based Q-factor measuring
A non-sampling-based Q-factor measuring apparatus and method use a power conversion module to transform the power variation of inputted optical signals in time domain into the variation in other...
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7561801 |
Optical transceiver with electrical ring distribution interface
A ring connection system and method are providing for distributing signals in an optical-to-electrical interface. The method electrically connects a plurality of nodes in a series-connecting ring,...
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7499465 |
Heuristic assignment of light-trails in an optical network
A method for assigning a light-trail in an optical network includes identifying unassigned traffic flows in the network that require assignment to a light-trail, where each traffic flow is...
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7477845 |
Method and apparatus for reducing data burst overhead in an ethernet passive optical network
A system is provided to reduce data burst overhead in an Ethernet passive optical network. During operation, the OLT transmits grant messages to a number of ONUs, wherein a grant message assigns a...
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7471902 |
Wavelength allocation method of signal light, and optical transmission apparatus and wavelength division multiplexing optical transmission system using the method
An object of the invention is to provide a wavelength allocation method of signal light, which is capable of consecutively allocating signal lights efficiently on wavelength grids, while...
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7453824 |
Method and system for identifying optimal mapping in a network
A method and system for identifying optimal mapping of logical links to the physical topology of a network is provided. Upon obtaining one or more mapping options for mapping multiple logical links...
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7434249 |
FTTH PON that O/E converts 1310 nm for output to transmitters for E/O as 1550 nm
A fiber to the home (FTTH) system based on a passive optical network (PON) includes an optical line terminal (OLT) block, an optical network terminal (ONT) block, and an optical distribution...
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7428383 |
Architecture, method and system of WDM-based photonic burst switched networks
An intelligent photonic burst switched (PBS) network includes edge nodes and switching nodes. The PBS edge node includes a flow classifier, flow manager, and ingress/egress PBS MAC layer...
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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 (λ c ) to pass through them, while reflecting the...
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7382953 |
Folded AWG architecture
Roughly described, an AWG has a waveguide array and a region of vertical-only confinement that is shared for both input and output beams of the waveguide array. The AWG layout is such that the...
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7380993 |
Optical transceiver for 100 gigabit/second transmission
An optical transmitter for converting and coupling an information-containing electrical signal with an optical fiber having an electrical input for coupling with an external electrical cable or...
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7379482 |
Programmable element of synchronous network and method for managing it
Described is a SDH or SONET telecommunication network element provided with a plurality of interfaces for managing first SDH or SONET flows, comprising: a) a plurality of first layer ports for...
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7375804 |
Single detector receiver for multi-beam LADAR systems
A LADAR apparatus and a method for use in receiving a LADAR signal are disclosed. The apparatus includes an optical pickup capable of picking up a plurality of optical signals; a timing...
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7369770 |
Method of assigning carrier frequencies in an optical transmission network
To optimize the resources of an optical transmission network using wavelength division multiplexing, assigning carrier frequencies to signals to be transmitted consists in associating N sets of...
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7359410 |
Apparatus and method for increasing optical density of SONET multiplexer using integral components
An OC3 to three DS3 SONET multiplexer is provided employing a field programmable gate array and other components in a single Type 400 mechanics card to achieve a form factor that is substantially...
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7340173 |
Wavelength division multiplexing optical transmitter using Fabry-Perot laser
A WDM (Wavelength Division Multiplexing) optical transmitter using a Fabry-Perot laser is disclosed. The WDM optical transmitter includes a light source for outputting incoherent light of a...
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7332234 |
Optoelectronic device capable of participating in in-band traffic
An optoelectronic device that has a network address (e.g., IF address) and participates in in-band traffic for purposes of performing functions (e.g., network diagnostics, network control, network...
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7330617 |
Wavelength selective optical switch, and optical device provided with spectroscopic function
A wavelength selective optical switch of the present invention separates a WDM light emitted from an input port of an input and output optical system, according to wavelengths, by a diffraction...
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7324548 |
Transceiver system and method supporting variable rates and multiple protocols
Present herein is a multirate transceiver wherein data can be received at a first data rate and transmitted at a second data rate. The transceiver device comprises a first interface for receiving...
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7295779 |
Wavelength division-multiplexing optical transmission system
A wavelength division-multiplexing system is provided that uses wavelength grids in conformity with the ITU-T Recommendation G.692 and that is realizable at lower costs. In the system, the...
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7295775 |
Method and a system for monitoring the transmission of optical signals
The present invention relates to a method of monitoring the transmission of optical signals including a step of inserting a monitoring signal (S) more particularly suited to monitoring the quality...
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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...
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7286759 |
System and method for dynamic wavelength assignment in wavelength division multiplex ring networks
System and method for dynamically assigning wavelengths wavelength division multiplex (“WDM”) ring networks is described. In one embodiment, the invention comprises a method for dynamic...
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7280470 |
Ring network for sharing protection resource by working communication paths
Multiple working paths are established on each working rings and multiple protection paths are established on each of multiple protection rings. A working path on a first working ring spans across...
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7257120 |
Quality of service (QoS) based supervisory network for optical transport systems
Associated with an optical transport system, a packet oriented supervisory network provides differentiated classes of service (CoS) for a plurality of WDM layer applications on diverse nodes such...
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7221820 |
High spectral efficiency, high performance optical MUX and DEMUX architecture
The present invention discloses a high performance optical architecture for multiplexing and demultiplexing channels for use in high spectral efficiency optical systems. In general, the MUX and...
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7218852 |
System and method for optical light path discovery
A system and method for discovering lightpath information in an optical network is disclosed. A selected node is requested to provide lightpath information. The node, in turn, requests the other...
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7209661 |
Wavelength multiplexing method and an apparatus thereof
An optical wavelength multiplexing apparatus is capable of controlling an attenuation amount of a variable optical attenuator at high speed, thereby preventing an optical level change generated by...
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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...
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7187864 |
Frequency comb analysis
Methods and apparatus for generating a frequency comb and for its use in analyzing materials and in telecommunications. The frequency comb is generated by passing pulsed light from a laser through...
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7187863 |
Identifying substreams in parallel/serial data link
In a first aspect, a stream of data is transmitted by dividing the stream of data into a first substream and a second substream, transmitting the first substream in a first data channel, and...
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7174067 |
Method and apparatus for spatial domain multiplexing in optical fiber communications
The subject invention pertains to a method and apparatus for multiplexing in optical fiber communications. The subject invention relates to a method and apparatus for spatial domain modulation in...
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7173763 |
Optical interleaver and filter cell design with enhanced clear aperture
An optical interleaver for use in a range of telecommunications applications including optical multiplexers/demultiplexers and optical routers. The optical device includes an optical processing...
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7162116 |
Depopulated switchable micro electro-mechanical systems (MEMS) based module for photonic fabric verification and protection
A depopulated MEMs array based protection switch is provided. The protection switch includes a depopulated protection array for rerouting optical signals using fewer switching elements than a fully...
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7155095 |
Method for efficient four-wave mixing generation and short pulse generation equipment using the method
The present invention provides a method for generating four-wave mixing to obtain idler light with high efficiency, in which the range of lengths of an optical fiber is appropriately set, and probe...
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7149432 |
Method and apparatus for equalization across plural data channels
Optical equalization across N (an integer, N>1) channels of a multi-channel link of a communications network, is accomplished by averaging effects of optical performance variations within each...
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7142363 |
Diffraction element and optical device
A diffraction element having high diffraction efficiency and large wavelength-separation effect, which is excellent in mass-productivity and is formed by a simple process, is obtained. In a...
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7139481 |
Optical multiplexing interconnect module
In an optical multiplexing interconnection module, first and second NRZ input signals synchronous by clock signal are inputted to its input section. The first NRZ input signal is converted to a...
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7130538 |
Optical switch and networking method
An optical node capable of automatically detecting its interconnectivity is disclosed. The node includes a light switch, a light source, light detector, a control circuit having a unique...
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7130503 |
Optical multiplexer/demultiplexer
Light of wavelengths λ 2 and λ 3 (λ 2<λ3 ) is propagated in a first core. The light emitted form the first core is divided at a filter. That is, the light of the wavelength λ 2 transmits...
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7130498 |
Multi-layer optical circuit and method for making
A multi-layer optical circuit has a plurality of optical circuit layers. Each optical circuit layer is positioned on a corresponding one of a plurality of substrates. An optical fiber extends...
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7130045 |
Monochromator and method of use
A monochromator for isolating or recombining a narrowband optical signal from a broadband signal. A cylinder with a continuous outer wall and two planar end surfaces is composed of a dispersive...
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7123845 |
Receiving apparatus with waveform degradation compensating function
A receiving apparatus comprises a first waveform degradation compensating unit, a second waveform degradation compensating unit, a received waveform measuring unit for measuring waveform data on a...
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7123835 |
Method and system for increasing the capacity and spectral efficiency of optical transmission
A method and system for increasing the capacity and spectral efficiency of optical transmission includes pre-filtering optical pulses utilizing a bandwidth substantially proportional to the bit...
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7123793 |
Modulator array architectures
An optical architecture is provided comprising at least one broadband light source, a mod/mux unit, and a plurality of premises stations in communication with the mod/mux unit via an optical...
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