中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

96 records (took 0.026 seconds)

    Ring network communication structure on an optical carrier and reconfigurable node for said structure
    2.
    发明公开
    Ring network communication structure on an optical carrier and reconfigurable node for said structure 失效
    通信网络与光学载体上的环结构和可重新配置的节点用于这种结构

    公开(公告)号：EP0716521A3

    公开(公告)日：1998-06-10

    申请号：EP95119360

    申请日：1995-12-08

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： CADEDDU ROBERTO ,  CALVANI RICCARDO ,  FERRARIS GIUSEPPE ,  LANO ROBERTO ,  VEZZONI EMILIO

    IPC: H04B10/02 ,  H04B10/20 ,  H04B10/213 ,  H04J14/02

    CPC classification number: H04J14/0283 ,  H04J14/0201 ,  H04J14/0212 ,  H04J14/0295

    Abstract: In a ring network communication structure for communication on an optical carrier (3A, 3B), a plurality of nodes (2A, ..., 2E) are interconnected by means of connections comprising at least a first (3A) and a second (3B) optical carrier, such as an optical fibre. Transmission occurs on the ring according to a WDM scheme, by utilising a first wavelength (λ
    1 ) for communication in one direction on the first carrier (3A) of said pair, while communication in the opposite direction occurs by employing a second wavelength (λ
    2 ) on the other optical carrier (3B). In the presence of a failure on one of the connections, the nodes adjacent (2B, 2C) to the failed connection reconfigure themselves to ensure the continuation of communication on the alternative path provided by the ring, by utilising the first wavelength (λ
    1 ) on the second carrier (3B) and the second wavelength (λ
    2 ) on the first carrier (3A). Preferential application to SDH optical fibre ring networks.

    3.
    发明专利
    未知

    公开(公告)号：DE745837T1

    公开(公告)日：1999-05-20

    申请号：DE96108754

    申请日：1996-05-31

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： CALVANI RICCARDO ,  CAPONI RENATO ,  NADDEO CLAUDIO ,  ROCCATO DIEGO

    IPC: G01M11/02 ,  G01M11/00

    Abstract: A train of transform-limited optical pulses with wavelength close to the zero-dispersion wavelength of the fibre (2) and high and variable peak power, such as to give rise to self-phase modulation, is sent into a fibre (2); the spectral broadening of the signal exiting the fibre (2) is measured for a number of values of the peak power of the pulses and the nonlinear refractive index is obtained from the angular coefficient of the straight line representing spectral broadening versus peak power. The device for carrying out the method is also provided.

    4.
    发明专利
    未知

    公开(公告)号：DE69410187T2

    公开(公告)日：1998-10-08

    申请号：DE69410187

    申请日：1994-08-09

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： CALVANI RICCARDO ,  VEZZONI EMILIO

    IPC: H04J14/00 ,  G02F1/09 ,  G02F1/31 ,  H04B10/27 ,  H04B10/275 ,  H04B10/29 ,  H04J14/02 ,  H04Q3/52 ,  H04B10/213

    Abstract: The device includes a first optical circulator (C1) connected in series with the line (1e, 1u) in order to receive a signal stream including a carrier to be extracted, modulated by an information signal, and to transmit a signal stream including the same carrier, re-inserted into the stream after having being modulated with another information signal, and a second optical circulator (C2) connected to local information processing means, to which it supplies the extracted carrier and from which it receives the carrier to be re-inserted. Between the two circulators there is an optical-fibre bandpass filter (FP) that can be tuned to the carrier wavelength.

    6.
    发明专利
    未知

    公开(公告)号：DE69403580D1

    公开(公告)日：1997-07-10

    申请号：DE69403580

    申请日：1994-08-09

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： CALVANI RICCARDO ,  VEZZONI EMILIO

    IPC: G02F1/313 ,  G02F1/09 ,  G02F1/31 ,  H04B10/213 ,  H04J14/02

    Abstract: The device includes a first and a second optical circulator (C1, C2) having an input port and an output port that are the inputs and the outputs of the switch, as well as an optical bandpass filter (FP) placed between the two circulators (C1,C2) and connected with means for switching its state so that the filter either reflects or transmits a given wavelength, thus allowing a carrier with this wavelength at the input port of one of the circulators (C1, C2) to reach the output port of the same circulator or the output port of the other circulator.

    7.
    发明专利
    未知

    公开(公告)号：IT1267645B1

    公开(公告)日：1997-02-07

    申请号：ITTO941008

    申请日：1994-12-09

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： CADEDDU ROBERTO ,  CALVANI RICCARDO ,  FERRARIS GIUSEPPE ,  LANO ROBERTO ,  VEZZONI EMILIO

    IPC: H04B10/27 ,  H04B10/03 ,  H04B10/275 ,  H04J14/02

    Abstract: In a ring network communication structure for communication on an optical carrier (3A, 3B), a plurality of nodes (2A, ..., 2E) are interconnected by means of connections comprising at least a first (3A) and a second (3B) optical carrier, such as an optical fibre. Transmission occurs on the ring according to a WDM scheme, by utilising a first wavelength ( lambda 1) for communication in one direction on the first carrier (3A) of said pair, while communication in the opposite direction occurs by employing a second wavelength ( lambda 2) on the other optical carrier (3B). In the presence of a failure on one of the connections, the nodes adjacent (2B, 2C) to the failed connection reconfigure themselves to ensure the continuation of communication on the alternative path provided by the ring, by utilising the first wavelength ( lambda 1) on the second carrier (3B) and the second wavelength ( lambda 2) on the first carrier (3A). Preferential application to SDH optical fibre ring networks.

Patent Agency Ranking