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1.发明专利
公开(公告)号：JP2003101514A
公开(公告)日：2003-04-04
申请号：JP2002199360
申请日：2002-07-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CAROLI CARL A , FELDMAN ROBERT D , YOUNG SCOTT D
Abstract: PROBLEM TO BE SOLVED: To provide an optical signal power control method at add/drop nodes in WDM (wavelength division multiplex) optical communication system. SOLUTION: The level of optical signal power of selected optical channel processed in an add/drop node of a WDM system is adjusted as a function of signal power fluctuation of incoming WDM signals generated by gain ripple. In particular, a ripple fitting method is described. According to this method, optical signal power of each optical channel added by the add/drop node is adjusted to a level corresponding to a ripple profile of another optical channel routed through the add/drop node. According to this arrangement, gain ripple of a WDM signal outputted from the add/drop node is made to correspond almost to the gain ripple of a WDM signal arriving to the add/drop node.
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公开(公告)号：JPH11163794A
公开(公告)日：1999-06-18
申请号：JP27070498
申请日：1998-09-25
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BOIVIN LUC , FELDMAN ROBERT D , NUSS MARTIN C
Abstract: PROBLEM TO BE SOLVED: To overcome coherent Rayleigh noise by connecting a cable to a photodetector that has a second bandwidth so that a first bandwidth is wider that the second bandwidth. SOLUTION: A light source 401 which has undergone spectrum slice is connected to a first end part of a first section 407 of an optical fiber cable. A second end part of the section 407 of the optical fiber cable is connected to an input port of a router 409. A first output port of the router 409 is connected to a first end part of a second section 411 of the optical fiber cable. A second output port of the router 409 is connected a first end part of a third section 413 of the optical fiber cable. The cable is connected to a light output source which has first bandwidth and has undergone spectrum slice, and the cable is connected to a photodetector which has second bandwidth so that the first bandwidth is wider that the second bandwidth.
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公开(公告)号：DE69833913T2
公开(公告)日：2006-11-23
申请号：DE69833913
申请日：1998-09-15
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BOIVIN LUC , NUSS MARTIN C , FELDMAN ROBERT D
Abstract: Low-noise, bidirectional communications in a fiber optic cable is achieved by coupling a first end of the cable to a spectrally-sliced optical power source. A second end of the cable is coupled to an optical detector having a detector bandwidth, such that the bandwidth of the optical power source is greater than the detector bandwidth. When the bandwidth of the optical power source is large compared to the bandwidth of the detector, the beat frequencies resulting from coherent Rayleigh noise fall outside the bandwidth of the detector and are not detected.
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4.发明专利
公开(公告)号：CA2385647C
公开(公告)日：2006-07-11
申请号：CA2385647
申请日：2002-05-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FELDMAN ROBERT D , CAROLI CARL A , YOUNG SCOTT D
IPC: H04J14/00 , H04J14/02 , H04B10/07 , H04B10/2543 , H04B10/293 , H04B10/296 , H04B10/297 , H04B10/564 , H04B10/572 , H04Q11/00
Abstract: Optical signal power levels for selected optical channels processed within an add/drop node in a wavelength division multiplexed (WDM) system are adjusted as a function of variations in signal power in an incoming WDM signal caused by gain ripple. In particular, a "ripple fitting" method is described whereby the optical signal power of individual optical channels being added at the add/drop node are adjusted to levels that correspond to the ripple profile of other optical channels being routed through the add/drop node. In this manner, the gain ripple in the WDM signal being output from the add/drop node approximately corresponds to the gain ripple i n the incoming WDM signal at the node.
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5.发明专利
公开(公告)号：CA2385647A1
公开(公告)日：2003-01-09
申请号：CA2385647
申请日：2002-05-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： YOUNG SCOTT D , CAROLI CARL A , FELDMAN ROBERT D
IPC: H04J14/00 , H04B10/07 , H04B10/2543 , H04B10/293 , H04B10/296 , H04B10/297 , H04B10/564 , H04B10/572 , H04J14/02 , H04Q11/00 , H04B10/20
Abstract: Optical signal power levels for selected optical channels processed within an add/drop node in a wavelength division multiplexed (WDM) system are adjusted as a function of variations in signal power in an incoming WDM signal caused by gain ripple. In particular, a "ripple fitting" method is described whereby the optical signal power of individual optical channels being added at the add/drop node are adjusted to levels that correspond to the ripple profile of other optical channels being routed through the add/drop node. In this manner, the gain ripple in the WDM signal being output from the add/drop node approximately corresponds to the gain ripple in the incoming WDM signal at the node.
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Patent Agency Ranking
公开(公告)号：CA2247610A1
公开(公告)日：1999-03-27
申请号：CA2247610
申请日：1998-09-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： NUSS MARTIN C , FELDMAN ROBERT D , BOIVIN LUC
Abstract: Low-noise, bidirectional communications in a fiber optic cable is achieved by coupling a first end of the cable to a spectrally-sliced optical power source. A second end of the cable is coupled to an optical detector having a detector bandwidth, such that the bandwidth of the optical power source is greater than the detector bandwidth. When the bandwidth of the optical power source is large compared to the bandwidth of the detector, the beat frequencies resulting from coherent Rayleigh noise fall outside the bandwidth of the detector and are not detected.
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公开(公告)号：DE60200060T2
公开(公告)日：2004-07-22
申请号：DE60200060
申请日：2002-05-22
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CAROLI CARL A , FELDMAN ROBERT D , YOUNG SCOTT D
IPC: H04J14/00 , H04B10/07 , H04B10/2543 , H04B10/293 , H04B10/296 , H04B10/297 , H04B10/564 , H04B10/572 , H04J14/02 , H04Q11/00
Abstract: Optical signal power levels for selected optical channels processed within an add/drop node in a wavelength division multiplexed (WDM) system are adjusted as a function of variations in signal power in an incoming WDM signal caused by gain ripple. In particular, a "ripple fitting" method is described whereby the optical signal power of individual optical channels being added at the add/drop node are adjusted to levels that correspond to the ripple profile of other optical channels being routed through the add/drop node. In this manner, the gain ripple in the WDM signal being output from the add/drop node approximately corresponds to the gain ripple in the incoming WDM signal at the node.
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公开(公告)号：DE60200060D1
公开(公告)日：2003-11-20
申请号：DE60200060
申请日：2002-05-22
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CAROLI CARL A , FELDMAN ROBERT D , YOUNG SCOTT D
IPC: H04J14/00 , H04B10/07 , H04B10/2543 , H04B10/293 , H04B10/296 , H04B10/297 , H04B10/564 , H04B10/572 , H04J14/02 , H04Q11/00
Abstract: Optical signal power levels for selected optical channels processed within an add/drop node in a wavelength division multiplexed (WDM) system are adjusted as a function of variations in signal power in an incoming WDM signal caused by gain ripple. In particular, a "ripple fitting" method is described whereby the optical signal power of individual optical channels being added at the add/drop node are adjusted to levels that correspond to the ripple profile of other optical channels being routed through the add/drop node. In this manner, the gain ripple in the WDM signal being output from the add/drop node approximately corresponds to the gain ripple in the incoming WDM signal at the node.
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公开(公告)号：CA2384236A1
公开(公告)日：2002-12-29
申请号：CA2384236
申请日：2002-04-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DOERR CHRISTOPHER RICHARD , CAROLI CARL A , FELDMAN ROBERT D
IPC: H04B10/27 , H04B10/278 , H04B10/29 , H04B10/291 , H04J14/00 , H04J14/02 , H04B10/20
Abstract: A WDM input signal received at an add/drop node is coupled onto both a "drop" transmission path and a "through" transmission path within the node. Optical channels to be dropped are then processed within the "drop" path, such as by optical demultiplexing. Because a copy of the same WBM input signal is routed on the "through" path, a dynamically configurable and programmable wavelength block er selectively blocks the optical channels that are being dropped from the WDM input signal and passes through those optical channels not being dropped onto the "through" path. In an "add" path within the node, optical channels are selectively added, such as by using optical multiplexing. Those optical channels from the multiplexed optical signal that are not designated for "add" (e.g., "unused" channels) are selectively blocked within the "add" transmission path. Optical channels from the "add" and "through" paths are then combined form a WDM output signal.
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公开(公告)号：DE69833913D1
公开(公告)日：2006-05-11
申请号：DE69833913
申请日：1998-09-15
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BOIVIN LUC , NUSS MARTIN C , FELDMAN ROBERT D
Abstract: Low-noise, bidirectional communications in a fiber optic cable is achieved by coupling a first end of the cable to a spectrally-sliced optical power source. A second end of the cable is coupled to an optical detector having a detector bandwidth, such that the bandwidth of the optical power source is greater than the detector bandwidth. When the bandwidth of the optical power source is large compared to the bandwidth of the detector, the beat frequencies resulting from coherent Rayleigh noise fall outside the bandwidth of the detector and are not detected.
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