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公开(公告)号：JP2001053723A
公开(公告)日：2001-02-23
申请号：JP2000177065
申请日：2000-06-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , ANDERSON JON , BROBERG ROBERT MARIO , LENZ GADI
Abstract: PROBLEM TO BE SOLVED: To obtain an optical add/drop module to improve isolation without increasing cost and a storage loss due to increase of components in a network. SOLUTION: This optical add/drop module(OADM) is constituted by including exactly two thin film filters (TFF) with respective path band wavelength of which approximately coincide with each other in a through path. Each TFF is provided with each across-the-band isolation level to indicate the minimum isolation to be achieved in either wavelength in the path bands. Reflection characteristic curves of each of the two TFFs are at least partially complementary so that an OADM isolation level exceeds logarithmic sum of the across-the- band isolation levels of each of the TFFs.
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公开(公告)号：JP2001036557A
公开(公告)日：2001-02-09
申请号：JP2000178068
申请日：2000-06-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , ANDERSON JON , BRINKMAN WILLIAM FRANK , BROBERG ROBERT MARIO
Abstract: PROBLEM TO BE SOLVED: To efficiently increase capacity of operation by connecting a series of nodes with hubs by a dual ring bi-directional optical fiber transmission system and constituting an optical additional drop module of a broad band filter like a dielectric thin film filter at each node. SOLUTION: Nodes are connected together to make a ring 101 to connect only one of optical transmission rings with three additional/drop nodes 110 to 112 and a hub 130 transmit a packet in the clockwise direction and to make a similar ring to transmit the packet in the counterclockwise direction. Each of the nodes 110 to 112 is provided with corresponding optical additional drop modules OADM 210 to 212. Namely, in a specified wavelength band corresponding to a specified widely spaced C-WAM channel, only a signal is extracted from a wavelength division multiplexed signal existing in the ring 101 and inserted into the same wavelength band and a C-WDM channel so as to be returned on the ring 101.
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公开(公告)号：JP2001053687A
公开(公告)日：2001-02-23
申请号：JP2000178071
申请日：2000-06-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , ANDERSON JON , BROBERG ROBERT MARIO , DIGIOVANNI DAVID JOHN , ROTTWITT KARSTEN
IPC: G02F1/35 , H01S3/30 , H04B10/17 , H04B10/20 , H04B10/213 , H04B10/29 , H04J14/00 , H04J14/02 , H04B10/16 , H04L12/42
Abstract: PROBLEM TO BE SOLVED: To obtain an optical ring network which can be expanded while suppressing the whole costs relatively low by using a dual ring two-way optical fiber transmission system that mutually connects a plurality of nodes and the a hub so that a plurality of WDM channels can be established in each ring. SOLUTION: A dual ring two-way optical fiber transmission system connects a series of nodes 110 to 116 to a hub 130. A distinct wavelength channel is allocated to each of the nodes 110 to 116, and the hub 130 and the nodes performs communication along a ring 101. Adjacent nodes and the hub 130 are connected by the link of a WDM ring, a pumped link is optically connected to a pump source and a signal made to pass through the pumped link is optically amplified. Then, the pumped link undergoes a different optical gain when a signal in a different wavelength channel is made to pass through a complete path between the hub 130 including the pumped link and a corresponding node.
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公开(公告)号：JP2001044944A
公开(公告)日：2001-02-16
申请号：JP2000178072
申请日：2000-06-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , ANDERSON JON , BROBERG ROBERT MARIO
Abstract: PROBLEM TO BE SOLVED: To reduce patch panel loss applied to the traffic of another receiver by taking the optical multiplexing and demultiplexing module (OADM) of a double ring two-way optical fiber transmission system out of an electronic cabinet and arranging the optical multiplexing and demultiplexing module at a place where an access possibility is low. SOLUTION: A WDM ring has an OADM that multiplexes and demultiplexes the signal of each node in the node. The WDM ring also has a power terminal device adjusting input - output data and performing conversion between a light area and an electricity area in each node. The OADM 501 of a node is arranged at a place that is physically separated from the power terminal device and connected to the power terminal device through an optical medium. In each node, traffic that is not to the node is subjected to routing through only one housing in the in-house of a subscriber requesting connection. In the case such a housing exists, the housing includes the OADM.
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公开(公告)号：AU3934900A
公开(公告)日：2000-12-21
申请号：AU3934900
申请日：2000-06-07
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , BRINKMAN WILLIAM FRANK , BROBERG ROBERT MARIO , ANDERSON JON
Abstract: A dual-ring, bi-directional optical fiber transmission system interconnects a series of add/drop nodes with a hub, such that multiple, widely spaced coarse wavelength division multiplexed (C-WDM) channels are established on each ring. At each node, an optical add/drop module (OADM) includes broadband filters (BBF's), such as dielectric thin film filters, arranged to (a) extract, for the purposes of a receiver, or (b) insert, for the purposes of a transmitter, information in one or more of the channels. The signals in the one or more channels are coupled to the OADM's by a standard optical transceiver, which performs modulation and demodulation. Each filter passband can be populated with multiple dense wavelength division multiplexed (D-WDM) channels, so that the capacity of traffic that can be handled at each node can be easily upgraded. The transceiver is, in turn, coupled to packet framer, such as an IP packet over SONET framer, which supplies received packets to, and receives outgoing packets from, a conventional Layer 3 routing engine. While in most instances, endpoints at each of the nodes communicate with other endpoints connected to the hub, if desired, endpoints at one or more nodes can communicate directly with endpoints on other nodes, using a direct or bypass connection through the hub. The bypass can be "permanent" or controlled via a switch, such as a micro-electro-mechanical switch (MEMS).
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Patent Agency Ranking
公开(公告)号：DE60000119T2
公开(公告)日：2002-10-31
申请号：DE60000119
申请日：2000-06-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , ANDERSON JON , BROBERG ROBERT MARIO
Abstract: A fiber-optic WDM ring carries communication traffic among a plurality of nodes, each node associated with respective subscriber premises. The WDM ring includes an optical add-drop module (OADM) at each node for adding and dropping signals associated with that node. The WDM ring also includes active terminal equipment at each node for conditioning incoming and outgoing data and for converting between the optical and electrical domains. The OADM at each of at least some nodes, to be referred to as enhanced nodes, is situated at a site physically separated from the powered terminal equipment, and is coupled to the powered terminal equipment via an optical medium. At each enhanced node, traffic not destined for that node is routed through no more than one enclosure on subscriber premises that requires a connection. If there is such enclosure, it contains the OADM.
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公开(公告)号：DE60000119D1
公开(公告)日：2002-05-16
申请号：DE60000119
申请日：2000-06-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , ANDERSON JON , BROBERG ROBERT MARIO
Abstract: A fiber-optic WDM ring carries communication traffic among a plurality of nodes, each node associated with respective subscriber premises. The WDM ring includes an optical add-drop module (OADM) at each node for adding and dropping signals associated with that node. The WDM ring also includes active terminal equipment at each node for conditioning incoming and outgoing data and for converting between the optical and electrical domains. The OADM at each of at least some nodes, to be referred to as enhanced nodes, is situated at a site physically separated from the powered terminal equipment, and is coupled to the powered terminal equipment via an optical medium. At each enhanced node, traffic not destined for that node is routed through no more than one enclosure on subscriber premises that requires a connection. If there is such enclosure, it contains the OADM.
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公开(公告)号：AU3938900A
公开(公告)日：2000-12-21
申请号：AU3938900
申请日：2000-06-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , ANDERSON JON , BROBERG ROBERT MARIO , LENZ GADI
Abstract: An optical add-drop module (OADM) includes in the through-path exactly two thin-film filters (TFFs) having respective passbands that approximately coincide in wavelength. Each TFF has a respective across-the-band isolation level, representing the smallest isolation achieved at any wavelength within the passband. The respective reflection characteristic curves of the two TFFs are at least partially complementary, such that the OADM isolation level exceeds the logarithmic sum of the across-the-band isolation levels of the respective TFFs.
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公开(公告)号：AU3938800A
公开(公告)日：2000-12-21
申请号：AU3938800
申请日：2000-06-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , ANDERSON JON , BROBERG ROBERT MARIO
Abstract: A fiber-optic WDM ring carries communication traffic among a plurality of nodes, each node associated with respective subscriber premises. The WDM ring includes an optical add-drop module (OADM) at each node for adding and dropping signals associated with that node. The WDM ring also includes active terminal equipment at each node for conditioning incoming and outgoing data and for converting between the optical and electrical domains. The OADM at each of at least some nodes, to be referred to as enhanced nodes, is situated at a site physically separated from the powered terminal equipment, and is coupled to the powered terminal equipment via an optical medium. At each enhanced node, traffic not destined for that node is routed through no more than one enclosure on subscriber premises that requires a connection. If there is such enclosure, it contains the OADM.
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公开(公告)号：AU3938500A
公开(公告)日：2000-12-21
申请号：AU3938500
申请日：2000-06-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , ANDERSON JON , BROBERG ROBERT MARIO , DIGIOVANNI DAVID JOHN , ROTTWITT KARSTEN
IPC: G02F1/35 , H01S3/30 , H04B10/17 , H04B10/20 , H04B10/213 , H04B10/29 , H04J14/00 , H04J14/02 , H04B10/12 , H04L12/56
Abstract: A fiber-optic WDM ring carries communication traffic among a plurality of nodes, each node associated with respective subscriber premises. Remote gain is provided in at least one link of the ring. In specific embodiments ot the invention, the remote gain is applied preferentially to those wavelength channels most in need of amplification. In specific embodiments of the invention, the remote gain is Raman gain.
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