公开(公告)号：JP2000267147A

公开(公告)日：2000-09-29

申请号：JP2000015649

申请日：2000-01-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MADSEN CHRISTI KAY

IPC: G02F1/313 ,  G02B6/12 ,  G02B6/122 ,  G02B6/28 ,  G02B6/34 ,  H04B10/02 ,  H04J14/00 ,  H04J14/02 ,  H04Q11/00

Abstract: PROBLEM TO BE SOLVED: To provide a channel selector for selecting one or plural channels from input multi-channel signals for specifying channels to a desired address in an optical communication system. SOLUTION: This channel selector selects a channel by separating a part of input multi-channel optical signals passing through plural optical paths. After that, a desired phase response is added to this separated part. As the result, the channels interferes each other constructively/destructively. This channel selector 110 comprises plural input ports 115, plural output ports 117, a splitter 116, a combiner 119, an all-pass optical filter 118, and plural optical paths 125.

公开(公告)号：JPH11223737A

公开(公告)日：1999-08-17

申请号：JP29267798

申请日：1998-10-15

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HENRY CHARLES H ,  MADSEN CHRISTI KAY ,  STRASSER THOMAS A

IPC: G01B9/02 ,  G01J9/02 ,  G02B6/12 ,  H04B10/02 ,  H04B10/43 ,  H04B10/28

Abstract: PROBLEM TO BE SOLVED: To provide an article such as a wavelength division multiplexer using a Bragg reflection Mach-Zehnder filter in which dependence on a coupler is reduced. SOLUTION: This Bragg reflection Mach-Zehnder filter 30 includes two plane optical waveguides 12 and 13, and each waveguide 12 and 13 includes interference arms 16 and 17 extended between two connecting areas. Each interference 16 and 17 is provided with a refractive index Bragg diffraction grating 18. This filter receives an optical input signal by one of the waveguides 12 and 13, and outputs a transmission signal transmitted through the Bragg diffraction grating 18 and a reflected signal reflected by the Bragg diffraction grating 18. In this case, the interference arms 16 and 17 introduce a πphase difference to the transmission signal, and the phase difference is not introduced to the reflected signal.

公开(公告)号：JP2000151513A

公开(公告)日：2000-05-30

申请号：JP30893799

申请日：1999-10-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KAZARINOV RUDOLF FEODOR ,  LENZ GADI ,  MADSEN CHRISTI KAY ,  SCOTTI RONALD EDWARD

IPC: G02B6/00 ,  G02B6/12 ,  G02B6/122 ,  G02B6/28 ,  G02B6/34 ,  H04B10/02 ,  H04B10/18 ,  H04L25/03

Abstract: PROBLEM TO BE SOLVED: To provide the full band pass optical filter that reduces dispersion of transmitted optical pulses. SOLUTION: This full band pass optical filter reduces dispersion of optical pulses 120 that are transmitted through the filter. The filter applies a desired phase response to the optical pulses that are transmitted through the filter to reduce the dispersion of the optical pulses. The filter has also a frequency independent amplitude response and has a structure that includes at least one feedback path 145, a splitter/combiner 143, an input port and an output port.

公开(公告)号：JPH11160742A

公开(公告)日：1999-06-18

申请号：JP26705698

申请日：1998-09-21

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MADSEN CHRISTI KAY

IPC: G02B6/12 ,  G02F1/01 ,  G02F1/065 ,  G02F1/313

Abstract: PROBLEM TO BE SOLVED: To provide an improve switchable filter by alternately arranging a phase shifter on at least one arm and reflection filters on respective arms on the middle section of the filter. SOLUTION: The switchable filter consists of an optical demultiplexer connected to an input waveguide, one or more output waveguides and plural interference waveguides. The switchable optical filter 10 constituted so as to be used as a gain equalization filter is provided with a Mach-Zchender interferometer 11 consisting of a pair of waveguide arms 12, 13 prolonging between a pair of couplers 14, 15. The middle section (arm part between couplers 14, 15) of the Mach-Zchender interferometer 11 contains alternately plural phase shifters ϕ1 , ≃2 ,..., ϕN, and passive brag gratings Λ1 , Λ2 ,..., ΛN, ΛN+1 . The filter is provided with reflection ports A, B and transmission ports C, D.

公开(公告)号：DE60032288T2

公开(公告)日：2007-05-31

申请号：DE60032288

申请日：2000-06-06

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FORD JOSEPH EARL ,  GOOSSEN KEITH WAYNE ,  MADSEN CHRISTI KAY ,  WALKER JAMES ALBERT

IPC: G02B26/06 ,  H04B10/18 ,  G02B5/28 ,  G02B6/34 ,  G02B26/00 ,  H04B10/02 ,  H04J14/00 ,  H04J14/02

Abstract: In accordance with the invention, a WDM optical communication system includes a new tunable multi-channel dispersion compensating filter (13) having low loss, low polarization dependence and capable of compensating many channels over a large wavelength range. In essence, the filter comprises an optical cavity (27) with a near 100% reflector (29) on one side and a variable partial reflector (19) on the other side. The device acts as a tunable all-pass filter.

公开(公告)号：DE60023048T2

公开(公告)日：2006-06-22

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 ,  H04Q11/00 ,  G02B6/293 ,  H04Q3/52

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.

公开(公告)号：DE602004026680D1

公开(公告)日：2010-06-02

申请号：DE602004026680

申请日：2004-11-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MADSEN CHRISTI KAY ,  RASRAS MAHMOUD

IPC: G02B6/122 ,  G02B6/26 ,  G02B6/12 ,  G02B6/132 ,  G02B6/136 ,  G02B6/14 ,  G02B6/30 ,  G02B27/00

Abstract: In accordance with the invention, an optical fiber is coupled to a planar waveguide through 1) a series of planar waveguide segments of enlarged cross section and 2) a segment of vertically tapered cross section. The combination of spaced segments and tapered segments provide efficient coupling over a much shorter length than required for conventional adiabatic coupling.

公开(公告)号：DE60100957T2

公开(公告)日：2004-09-02

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.

公开(公告)号：DE69808867D1

公开(公告)日：2002-11-28

申请号：DE69808867

申请日：1998-09-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MADSEN CHRISTI KAY

IPC: G02B6/12 ,  G02F1/01 ,  G02F1/065 ,  G02F1/313 ,  G02F1/225 ,  H04J14/02

公开(公告)号：DE60000166D1

公开(公告)日：2002-06-20

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.