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1.发明专利
公开(公告)号：JP2000013328A
公开(公告)日：2000-01-14
申请号：JP11890099
申请日：1999-04-27
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FATEHI MOHAMMAD T , NELSON BRUCE LEE , RAYCHAUDHURI KAMAL KUMAR
Abstract: PROBLEM TO BE SOLVED: To control a power level of an optical signal to reduce substantially a defect in the optical signal caused in a failure downstream in an optical fiber path. SOLUTION: A device that automatically reduces or shuts optical signal power fed from an upstream circuit network element is placed along an optical fiber path includes a directional optical transfer device 220 placed along the optical fiber path and coupled with the circuit network element, an optical power monitor 231 that measures reflected light energy received through a directional photocoupler 212 as a result of downstream discontinuous fiber, and a control circuit 250 that is provided between the power monitor and the circuit network element to control the optical signal power supplied from the circuit network element based on the power level resulting from monitoring the reflected optical signal. The control circuit 250 may be an analog or digital control circuit or can use a microprocessor operated under the software or firmware program control.
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公开(公告)号：JPH11149097A
公开(公告)日：1999-06-02
申请号：JP24241298
申请日：1998-08-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FATEHI MOHAMMAD T
Abstract: PROBLEM TO BE SOLVED: To realize a wavelength selective adding/removing function without a loss by providing an integrated amplifier, a wavelength selecting fiber path and a passive optical coupler in order to selectively add or remove a wavelength signal to or from multiple wavelength signals. SOLUTION: This system mounts a fiber amplifier (EDFA) consisting of at least two segments of fibers (EDF) which are dopingly processed with erbium and which is dopingly processed with erbium, at least one of a wavelength selecting element 230 and an exciting part provided with a coupler 262 and an optical excitation separator 263. Then, proper amplifying operations are performed in order to compensate specific losses in paths of an addition, a removal and a passage. Moreover, a freely expandable constitution supporting the additional service of a addition/removal without interrupting the content of a present service is realized by integrating an amplifying function and a wavelength selective adding/removing function.
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公开(公告)号：JP2001112034A
公开(公告)日：2001-04-20
申请号：JP2000239400
申请日：2000-08-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FATEHI MOHAMMAD T , KNOX WAYNE HARVEY
Abstract: PROBLEM TO BE SOLVED: To provide a method for realizing an optical cross connection exchange that can switch optical signals relating to many optical channels and requires only a few wavelength selection elements to each passing signal path and to provide an exchange. SOLUTION: The number of the wavelength selection elements having been required for signal paths of a conventional optical cross connection exchange is considerably reduced in the new optical cross connection exchange of this invention. A single optical channel distributor or more distributors accept wavelength multiplex optical signal as an input. Each signal includes channels, each of which is related to a single wavelength or more. Each distributor is distributed to any of a plurality of wavelength selection cross connectors arranged to receive each channel of the related wavelength multiplex input signal from the single or a plurality of distributors relating to a unique subset among a plurality of wavelengths.
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4.发明专利
公开(公告)号：JPH11154769A
公开(公告)日：1999-06-08
申请号：JP24241198
申请日：1998-08-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FATEHI MOHAMMAD T
IPC: H01S3/10 , G02B6/34 , H01S3/06 , H01S3/067 , H04B10/02 , H04B10/17 , H04B10/29 , H04J14/02 , H04B10/16
Abstract: PROBLEM TO BE SOLVED: To eliminate a passage loss due to the addition or elimination of wavelength, by optically exciting a fiber amplifier that is subjected to doping treatment by rate earth elements. SOLUTION: A wavelength division multiplexing signal is fed as an input to an optical circulator 310. When it exits the light circulator 310, it is amplified by an optical fiber segment 340 that is subjected to doping treatment by erbium before reaching a Bragg lattice 330. The Bragg lattice 330 is adapted to reflect and return the subset of a light signal with a selective wavelength toward the optical circulator 310. These reflected signals are eliminated, subjected to multiplex separation, or divided as needed. In this configuration, an excitation source 360 is coupled to an area between the optical fiber segment 340 and an output port 312 of the light circular 310, thus exciting the optical fiber segment 340 so that an erbium ion reaches a high meta-stable energy state.
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公开(公告)号：JP2002111741A
公开(公告)日：2002-04-12
申请号：JP2001250223
申请日：2001-08-21
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FATEHI MOHAMMAD T , LAWRENCE VICTOR B , SOHRABY KAZEM A
Abstract: PROBLEM TO BE SOLVED: To enable to handle ATM cells and IP packets when a multi-traffic type is carried. SOLUTION: Network nodes 105, 110, 115 and 120 transfer mixed different types of traffics having a plurality of protocol formats which are supplied by a plurality of users or sub networks in a communication network 100. The different types of traffics are packed in a digital container by which routing between interconnected users or network nodes of the sub networks are performed. The digital container has a frame structure which is composed of a header section and a payload section.
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Patent Agency Ranking
公开(公告)号：JP2000295182A
公开(公告)日：2000-10-20
申请号：JP2000078071
申请日：2000-03-21
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FATEHI MOHAMMAD T , LA ROCHE HUMBERTO JOSE , SOHRABY KAZEM A
Abstract: PROBLEM TO BE SOLVED: To provide a wavelength division multiplex(WDM) network that provides seamless connection performance from a long distance network to a metropolitan area network, to an access network and finally to a desktop of a user. SOLUTION: A WDM ring architecture includes a central node 102 that generates a plurality of WDM signals with a plurality of continuous wave (non modulation) optical wavelengths, which are sent to a plurality of access nodes 111, 112, 113, 114 of the system via an optical facility. One or two or over of the non modulation optical wavelength are separated from the WDM signal received via the optical facility, modulated by a user's or customer's signal and multiplexed on the WDM signal on the optical facility.
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公开(公告)号：JPH10209544A
公开(公告)日：1998-08-07
申请号：JP35597697
申请日：1997-12-25
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FATEHI MOHAMMAD T , KNOX WAYNE HARVEY
Abstract: PROBLEM TO BE SOLVED: To obtain an optical communication element, especially, an optical selector switch with low switching speed by using a rare-earth doped fiber light amplifier as a switch element of a gain switch optical selector. SOLUTION: The secondary output of a coupler 207 is supplied to a light- electricity convertor 208, and its output is subject to accurate pumping selection in a selection circuit 209. In this step, the circuit 208 monitors the power level of a selection signal and determines a parameter and an ID tag related to the selection route to be supplied to the coupler 207. In addition, an instruction and control information from an instruction and control device 210 is supplied to the circuit 209, and it is used together with an information from other net element in an optical system, so that a pump 205 or a pump 206 is selected, and according to the selection, an amplifier 203 or an amplifier 204 is selected to output an optical signal as an output to an optical fiber 211 through the coupler 207.
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公开(公告)号：JPH11231232A
公开(公告)日：1999-08-27
申请号：JP34499798
申请日：1998-12-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FATEHI MOHAMMAD T , FORD JOSEPH EARL
Abstract: PROBLEM TO BE SOLVED: To provide a free space optical switching array device using only orientation of optical transmitter beams. SOLUTION: Optical signal switching (OXC) from N transmitter to M receivers in free spaces (N and M are larger than 1) requires only transmitter beam orientation for controlling to which receiver 230 the optical signals from the transmitters 210 should be sent. It is preferred that the transmitters 210 process single mod optical signal, and the receiver 230 process multiple mode optical signals. OXC may optionally include fixed an optical unit packaged using either a single fixed common lens or plural M pieces of optical elements for further orienting each of the M pieces of optical signals to their individual receivers 230.
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公开(公告)号：JPH10233546A
公开(公告)日：1998-09-02
申请号：JP35597597
申请日：1997-12-25
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FATEHI MOHAMMAD T , KNOX WAYNE HARVEY
Abstract: PROBLEM TO BE SOLVED: To make it possible to broadcast a light signal to a plurality of outputs from an arbitrary input and to it in a multiple-wavelength optical network by a method wherein an exchange-type pump together with an identical rare-earth-doped light amplifier is used for a gain-exchange optical distributor and a selector. SOLUTION: In a gain-exchange optical distributor and a star optical coupler 102-1 as a selector, an input light signal on an input 101-1 is coupled to respective light amplifiers 103-11 to 103-14 which use a rear-earth-doped fiber. In a star optical coupler 102-2, an input light signal on an input 101-2 is coupled to light amplifiers 103-21 to 103-24. In addition, a star optical coupler 102-3 is coupled to light amplifiers 103-31 to 103-34, and a start optical coupler 102-4 is coupled to light amplifiers 103-41 to 103-44. Then, exchange-type pumps 104-11 to 104-14 and 104-41 to 104-44 are made to correspond to light amplifiers 103-11 to 103-14 and 103-41 to 103-44.
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公开(公告)号：JPH10209966A
公开(公告)日：1998-08-07
申请号：JP32739097
申请日：1997-11-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FATEHI MOHAMMAD T , KNOX WAYNE HARVEY
Abstract: PROBLEM TO BE SOLVED: To improve the operating speed and reliability by using an optical fiber amplifier consisting of an optical fiber of a rare earth dope as a gain switching optical connection device to construct a gain switching optical distributor and a gain switching optical selector and securing the cross connection between the distributor and the selector. SOLUTION: At a head end, the input optical signal received at an input terminal 101 is inputted to the GSOA(gain switching optical amplifier) 103 and 108 via an optical star coupler 102. Each of GSOA 103 and 108 contains an optical fiber amplifier consisting of an optical fiber of an erbium dope, and the input optical signal and a pump signal are inputted to the input side of the GSOA via a wavelength division multiplex coupler and then outputted from the output side via an optical isolator respectively. One of both GSOA 103 and 108 is turned on under the control of a pump controller 111 and sends the optical signal to one of loss type optical fibers/optical devices 104 and 109. Thus, a gain switching optical distributor is formed.
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