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    OPTICAL FIBER COMMUNICATIONS SYSTEM
    11.
    发明专利
    OPTICAL FIBER COMMUNICATIONS SYSTEM 失效

    公开(公告)号：JPH11225112A

    公开(公告)日：1999-08-17

    申请号：JP31198098

    申请日：1998-11-02

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： ADAMS LAURA ELLEN ,  CHEN YOUNG-KAI ,  NYKOLAK GERALD

    IPC: G02F1/01 ,  H04B3/04 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/20 ,  H04B10/29 ,  H04B10/16

    Abstract: PROBLEM TO BE SOLVED: To correct nonlinearity of a signal sent through an optical fiber in response to a change in a transmission condition and a change in an optical path. SOLUTION: This system 100 uses a signal bed back from a receiver 104 to generate a spectrum profile of an incident pulse matching it so as to minimize distortion of a received pulse. Since feedback control is used to make adaptive to a change in a transmission condition in a fiber path. In the case that a pulse train is sent and looped back via a network, adaptive processing is conducted for a training session of a data frame. After the training is finished, a loop back path is interrupted and pre-distortion is applied to the sent pulse and data transmission starts.

    LASER TRANSMITTER FOR REDUCED SBS
    12.
    发明专利
    LASER TRANSMITTER FOR REDUCED SBS 失效

    公开(公告)号：JPH11195843A

    公开(公告)日：1999-07-21

    申请号：JP29795398

    申请日：1998-10-20

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： ADAMS LAURA ELLEN ,  BETHEA CLYDE GEORGE ,  ESKILDSEN LARS ERIK ,  NYKOLAK GERALD ,  PEOPLE ROOSEVELT ,  TANBUN-EK TAWEE

    IPC: H04B10/02 ,  H01S5/00 ,  H01S5/042 ,  H01S5/062 ,  H01S5/0625 ,  H01S5/125 ,  H04B10/18 ,  H04B10/43 ,  H01S3/18 ,  H04B10/28

    Abstract: PROBLEM TO BE SOLVED: To reduce stimulus Brillouin scattering by, related to an optical fiber system, comprising an integral internal void synthesis reflector, to which tuning voltage and dither signal are added for tuning in broad band. SOLUTION: A semiconductor laser 10 which allows broad band tuning comprises a gain section 12 and an internal void synthesis reflector section 14, and a current driver 16 supplies a current to the gain section 12 for generating an output signal 20. A forward bias DC voltage is supplied to the synthesis reflector section 14 from a bias source 18 for controlling a phase of an optical field in the void inside laser, thus carrier frequency of an output signal is roughly adjusted. Further, the output signal is combined to a transfer medium having tendency to generating stimulus Brillouin scattering(SBS). In order for reducing the SBS, a dither signal of relatively low frequency and low voltage is further added to the synthesis reflector section 14. The spectrum of the output signal is widened for increased SBS threshold.

    Wideband optical packet ring network
    13.
    发明专利
    Wideband optical packet ring network 未知

    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

    IPC: H04B10/20 ,  H04J14/00 ,  H04J14/02 ,  H04L12/42 ,  H04Q11/00 ,  H04B10/24

    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).

    15.
    发明专利
    未知

    公开(公告)号：DE69810732T2

    公开(公告)日：2003-09-11

    申请号：DE69810732

    申请日：1998-10-13

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： ADAMS LAURA ELLEN ,  BETHEA CLYDE GEORGE ,  NYKOLAK GERALD ,  PEOPLE ROOSEVELT ,  TANBUN-EK TAWEE

    IPC: H04J14/00 ,  H01S5/00 ,  H01S5/02 ,  H01S5/026 ,  H01S5/06 ,  H01S5/0625 ,  H01S5/12 ,  H01S5/50 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04J7/00 ,  H04J14/02 ,  H04J14/04

    Abstract: In a WDM fiber-optic network, a unique laser transmitter enables signals to be routed at three hierarchical levels: at one level discrimination among signal paths is based on N WDM wavelength channels, at another level discrimination is based on m AM subcarrier frequency channels, and at a third level discrimination is based on n FM subcarrier frequency channels. Thus, a total of Nmn distinguishable optical channels can be accommodated and a like number of users served. The laser transmitter comprises a broadband, tunable semiconductor laser which includes an intracavity, integrated composite reflector to which a tuning voltage and a FM dither signal are applied, an intracavity gain section to which drive current is applied, and an extracavity, integrated electroabsorption modulator to which an information (e.g., data, voice, video) signal and an AM dither signal are applied. The tuning voltage provides coarse wavelength tuning among N WDM channels, whereas the FM dither signal produces an additional m channels via FM-SCM. The AM dither likewise produces an additional n channels via AM-SCM.

    16.
    发明专利
    未知

    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

    IPC: H04B10/20 ,  H04B10/02 ,  H04B10/2581 ,  H04J14/00 ,  H04J14/02 ,  H04L12/42

    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.

    17.
    发明专利
    未知

    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

    IPC: H04B10/20 ,  H04B10/02 ,  H04B10/2581 ,  H04J14/00 ,  H04J14/02 ,  H04L12/42

    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.

    WIDEBAND OPTICAL PACKET RING NETWORK
    18.
    发明专利
    WIDEBAND OPTICAL PACKET RING NETWORK 未知

    公开(公告)号：CA2310949A1

    公开(公告)日：2000-12-15

    申请号：CA2310949

    申请日：2000-06-05

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： ANDERSON JON ,  BRINKMAN WILLIAM FRANK ,  ADAMS LAURA ELLEN ,  BROBERG ROBERT MARIO

    IPC: H04B10/20 ,  H04J14/00 ,  H04J14/02 ,  H04L12/42 ,  H04Q11/00

    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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