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公开(公告)号：JP2001156716A
公开(公告)日：2001-06-08
申请号：JP2000298175
申请日：2000-09-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DOERR CHRISTOPHER RICHARD , GILES RANDY CLINTON
IPC: G02B26/02 , G02B6/12 , G02B6/34 , G02F1/01 , H04B10/02 , H04B10/43 , H04J14/00 , H04J14/02 , H04Q3/52
Abstract: PROBLEM TO BE SOLVED: To realize both an add/drop function and an add and continue function for WADM node of an optical communication network at the same time. SOLUTION: This invention provides a configuration including two duplicate port waveguide grating routers(WGR) and a plurality of attenuation switches. The one WGR is configured as a 1×2N demultiplexer and the other as a 2N×1 multiplexer. Each WGR includes a plurality of duplicate input or output waveguides and the respective pairs have nearly the same spectral characteristic. The 1st output waveguides of the 1st WGR are connected to the input waveguides of the 2nd WGR and the attenuation switches are provided between them to cut off a specific wavelength. The 2nd output waveguide of the 1st WGR act like drop waveguide and the 2nd waveguides of the 2nd WGR act like add waveguides to realize the add/drop function.
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公开(公告)号：JPH11311814A
公开(公告)日：1999-11-09
申请号：JP6871099
申请日：1999-03-15
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DOERR CHRISTOPHER RICHARD , LI YUAN P
Abstract: PROBLEM TO BE SOLVED: To provide an optical add-drop multiplexer(ADM) which avoids crossing of waveguides by having Mach-Zehnder interferometer constitution having demultiplexer/multiplexer couples at respective shunts. SOLUTION: In ADM 60, the respective multiplexer/demultiplexer couples (300-1, 400-1) (300-2, 400-2) are interconnected by coherent connection waveguides 70 and 80 having heating elements 65 and 66 for increasing the path length of a selected connection waveguide. Waveguide optical couplers 61 and having an asymmetrical transfer function are used for the input port and output port of the ADM 60. Those couplers add and drop selected optical channels for an optical transmission line by cooperating with heating elements in active states.
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公开(公告)号：CA2371272A1
公开(公告)日：2002-09-15
申请号：CA2371272
申请日：2002-02-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DOERR CHRISTOPHER RICHARD
Abstract: A wavelength-selective cross connect (WSC) switch is disclosed that can selectively pass a mufti-wavelength incoming signal received on a given incoming port to a corresponding output port in a bar state; or cross the received signal to an opposite output port in a cross state, using only two wavelength blockers and a numbe r of optical circulators. Power splitters divide the power of each incoming signal in hal f and the half power signals are applied to the two wavelength blockers surrounded by corresponding optical circulators. Each of the wavelength blockers control either the bar state or the cross state. The outputs of the two wavelength blockers are combined to produce an output signal at each of the output ports. Thus, the wavelength-selective cross connect can selectively pass or cross an incoming signal to an appropriate output port, as desired. The disclosed wavelength-selective cross connects can be serviced without interrupting traffic- In addition, the disclosed wavelength-selective cross connect requires only shutters, i.e., the wavelength blocker, and is significantly easier to manufacture than a device requiring switches.
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公开(公告)号：CA2479178C
公开(公告)日：2008-09-30
申请号：CA2479178
申请日：2003-03-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DOERR CHRISTOPHER RICHARD
Abstract: A thenno-optic lens (150) of the present invention includes a plurality of parallel heating elements (2101-210n) having substantially constant center-t o- center spacing and respective dimensions varying from the outermost heating elements to the innermost heating elements, and at least two conductive elements (2201, 2202) for providing a potential across the heating elements. The dimensions of the heating elements are varied such that a parabolic temperature distribution is generated within the thermo-optic lens. A dispersion compensator (100) of the present invention includes a first and a second waveguide grating (1101, 1102), each of the waveguide gratings having a first star coupler (1301, 1322), an array of waveguides (1201-120n, 1221-122 n) of increasing path lengths, a first end of each of the waveguides of the arr ay of waveguides optically coupled to the first star coupler, and a second star coupler (1302, 1322), a second end of each of the waveguides of the array of waveguides optically coupled to the second star coupler. The dispersion compensator further includes a lens (150) having a parabolic refractive inde x distribution, the lens optically coupling the second star coupler of the fir st waveguide grating and the second star coupler of the second waveguide gratin g.
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公开(公告)号：DE60115525T2
公开(公告)日：2006-07-20
申请号：DE60115525
申请日：2001-03-12
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DAMASK JAY N , DOERR CHRISTOPHER RICHARD
Abstract: A double-pass birefringent filter apparatus comprises an external-interface apparatus (illustratively including of a beam-displacer element and a waveplate element); a birefringent filter comprised of a series of several birefringent waveplates; and a wrap-around unit (illustratively comprised of a beam-displacer element and a retro-reflector). In response to an input beam received at the external-interface apparatus, the double-pass birefringent filter forms two output beams having complimentary intensities which vary periodically with frequency.
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Patent Agency Ranking
公开(公告)号：DE602004000348D1
公开(公告)日：2006-04-13
申请号：DE602004000348
申请日：2004-02-24
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHANDRASEKHAR SETHUMADHAVAN , CHRAPLYVY ANDREW ROMAN , DOERR CHRISTOPHER RICHARD , WINZER PETER J
Abstract: An improved multi-channel optical equalizer method and apparatus for intersymbol interference mitigation compensates for single- or multi- wavelength channels simultaneously and requires few adjustable parameters. The optical equalizer can also compensate for overshoots and signal transition degradations of a semiconductor optical amplifier. The equalizer unit has only two control signals, one to control signal magnitude and one to control signal phase, yet it can still compensate many wavelength channels simultaneously. The equalizer includes a coupler with a controllable coupling ratio for splitting the light into two portions and a controllable interferometer means having two arms, one arm having an additional delay which is equal to an integer multiple of 1/ DELTA f, where DELTA f is the channel spacing between adjacent wavelengths utilized in the optical system. The controllable interferometer unit also has a controllable delay in a first or second arm for adjusting the relative phase of the light passing therethrough. A coupler combines the two signal portions from the first and second arms to form the equalized output signal. In a second embodiment, the equalizer includes two equalizer units connected in series to compensate for both leading and lagging intersymbol interference.
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公开(公告)号：CA2372536A1
公开(公告)日：2002-09-15
申请号：CA2372536
申请日：2002-02-18
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DOERR CHRISTOPHER RICHARD
Abstract: A method and apparatus are disclosed for selectively passing or blocking an optical signal using an opaque or reflective shutter that is selectively positioned in or out of the light path. The disclosed wavelength blocker can be employed to filter input wavelength-division multiplexed (WDM) signal comprised of N wavelength channels, where a mechanical shutter array selectively passes each of the N wavelength channels. Each mechanical shutter may be controlled, for example, by a micromachine control element that physically lifts the shutter into or out of the lightpath. The disclosed wavelength blockers may be utilized in wavelength-selective cross connects, as well as other optical devices. In an exemplary wavelength-selective cross connect, a n array of mirrors are employed in a planar waveguide having two sets of waveguide gratings intersecting at an angle. The mirrors and waveguide gratings are positioned such that if the mirror for a given channel is up (removed from the light path), then tha t channel passes across the device and exits the corresponding output port (bar state) , otherwise the light is reflected by the mirror and exits the opposite output port (bar state).
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公开(公告)号：DE69840088D1
公开(公告)日：2008-11-20
申请号：DE69840088
申请日：1998-08-25
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DOERR CHRISTOPHER RICHARD
Abstract: A Wavelength-Division-Multiplexer (WDM) cross-connect (100) is implemented using two connected units of angular dispersive elements, with non-zero relative phase shifts between the elements, which are interconnected using controllable phase shifters. Another embodiment uses two "interleave-chirped" waveguide grating routers (110, 120) connected by waveguides with phase shifters (130,140). The phase shifters can be selectively controlled (at 149) enabling the WDM to be reconfigureable. Yet another embodiment recognizes the symmetrical property of the WDM cross-connect and uses a reflector unit to replace one half of the WDM cross-connect.
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公开(公告)号：DE602005001370T2
公开(公告)日：2008-02-07
申请号：DE602005001370
申请日：2005-08-11
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DOERR CHRISTOPHER RICHARD
Abstract: A method of and apparatus for implementing a wavelength-tracking dispersion compensator (WT-DC) that tracks the wavelength of a
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公开(公告)号：CA2371272C
公开(公告)日：2005-10-04
申请号：CA2371272
申请日：2002-02-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DOERR CHRISTOPHER RICHARD
Abstract: A wavelength-selective cross connect (WSC) switch is disclosed that can selectively pass a mufti-wavelength incoming signal received on a given incoming port to a corresponding output port in a bar state; or cross the received signal to an opposite output port in a cross state, using only two wavelength blockers and a numbe r of optical circulators. Power splitters divide the power of each incoming signal in hal f and the half power signals are applied to the two wavelength blockers surrounded by corresponding optical circulators. Each of the wavelength blockers control either the bar state or the cross state. The outputs of the two wavelength blockers are combined to produce an output signal at each of the output ports. Thus, the wavelength-selective cross connect can selectively pass or cross an incoming signal to an appropriate output port, as desired. The disclosed wavelength-selective cross connects can be serviced without interrupting traffic- In addition, the disclosed wavelength-selective cross connect requires only shutters, i.e., the wavelength blocker, and is significantly easier to manufacture than a device requiring switches.
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