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21 records (took 0.128 seconds)

    12.
    发明专利
    未知

    公开(公告)号：DE60127762T2

    公开(公告)日：2007-12-27

    申请号：DE60127762

    申请日：2001-06-04

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： MADSEN CHRISTI KAY

    IPC: H04B10/18

    Abstract: A polarization mode dispersion compensator splits an optical signal splits an optical signal into two optical signals. A first optical path provides polarization rotation of one of the two optical signals. The two optical signals are filtered by a combination of allpass filters and at least one 2x2 coupler. A second optical path then provides polarization rotation of the other of the two optical signals before the two optical signals are combined.

    14.
    发明专利
    未知

    公开(公告)号：DE60023048D1

    公开(公告)日：2005-11-17

    申请号：DE60023048

    申请日：2000-02-09

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： MADSEN CHRISTI KAY ,  SOOLE JULIAN BERNARD SOOLE

    IPC: H04B10/02 ,  G02B6/293 ,  H04Q3/52 ,  H04Q11/00

    Abstract: The present invention provides NxN non-blocking switch modules using MMI-based switch elements. The arrangement requires a minimum of control elements to effect switching and uses no crossings of the signal waveguides. The switch control settings may be determined by following a simple and transparent algorithm for the set-up procedure. Very high-order switch fabrics comprising a variety of the taught non-blocking NxN switch modules are envisaged. Determination of the appropriate values for 'N' is a practical consideration which trades-off the performance of the individual switch modules with the complexity required of the associated module interconnection fabric. The spatial switch fabrics that may by built from the non-blocking MMI-based switch arrangements may be combined with both wavelength-division switches and time-division switches to form any combination of higher order space-wavelength-time switch.

    15.
    发明专利
    未知

    公开(公告)号：DE60100957D1

    公开(公告)日：2003-11-20

    申请号：DE60100957

    申请日：2001-01-15

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： LENZ GADI ,  MADSEN CHRISTI KAY

    IPC: G02B5/28 ,  G02B5/20 ,  G02F1/01 ,  H04B10/02 ,  H04B10/155 ,  H04B10/18 ,  H04J14/08

    Abstract: A single-stage all-pass optical filter is disclosed that may be applied to generate a large tunable delay of an optical pulse train. The all-pass optical filter includes an input port for receiving an input optical pulse having a regular repetition rate; an output port; a splitter/combiner; and one feedback path. A plurality of frequency-dependent time delay periods are applied to the input optical pulse so that the filter is characterized by a time-delay spectrum having a plurality of delay peaks. The free-spectral range (FSR) of the filter, i.e., the spacing between the delay peaks, is matched to the regular repetition rate of the input optical pulse. This matching is accomplished by the FSR being equal to the repetition rate or offset from the repetition rate to a sufficiently small degree that each frequency of the pulse train will fall within the bandwidth of one of the plurality of delay peaks. This single-stage all-pass optical filter is advantageous for correcting linear chirp of a pulsed laser or synchronizing control signals in an optical time-division multiplexer/demultiplexer system.

    16.
    发明专利
    未知

    公开(公告)号：DE60000166T2

    公开(公告)日：2002-11-14

    申请号：DE60000166

    申请日：2000-01-31

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： MADSEN CHRISTI KAY ,  SOOLE JULIAN BERNARD

    IPC: H01S5/0687 ,  H01S5/40 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H01S3/13 ,  H01S3/23

    Abstract: A wavelength stable optical source (9) comprises at least one adjustable wavelength optical source (10), a multipath Mach-Zehnder interferometer (MMZI) (11) for receiving a signal from the adjustable source and providing a primary output (01) and one or more secondary outputs, (02), and a feedback arrangement (13) responsive to the outputs for adjusting the wavelength source. Photodetectors (12A,12B) coupled to the primary output and one or more of the secondary outputs provide feedback information for maintaining wavelength stability.

    19.
    发明专利
    未知

    公开(公告)号：DE60127762D1

    公开(公告)日：2007-05-24

    申请号：DE60127762

    申请日：2001-06-04

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： MADSEN CHRISTI KAY

    IPC: H04B10/18

    Abstract: A polarization mode dispersion compensator splits an optical signal splits an optical signal into two optical signals. A first optical path provides polarization rotation of one of the two optical signals. The two optical signals are filtered by a combination of allpass filters and at least one 2x2 coupler. A second optical path then provides polarization rotation of the other of the two optical signals before the two optical signals are combined.

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