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公开(公告)号：JPH1168216A
公开(公告)日：1999-03-09
申请号：JP3526198
申请日：1998-02-17
Applicant: CORNING INC , NORTHERN TELECOM LTD
Inventor： BENNETT KEVIN W , DAVIS FIONA , HABEL RICHARD A , JAKOBSON PAUL A , JOLLEY NIGEL E , KEYS ROBERT W , ROBERTS KIM BYRON , NEWHOUSE MARK A , YADLOWSKY MICHAEL J
IPC: H01S3/07 , H01S3/06 , H01S3/094 , H01S3/10 , H01S3/13 , H01S3/131 , H01S3/17 , H04B10/12 , H04B10/17 , H04J14/00 , H04J14/02
Abstract: PROBLEM TO BE SOLVED: To substantially reduce gain difference due to pump optical wavelength. SOLUTION: A transfer system comprises a transmitter and a receiver connected with an optical fiber. A plurality of optical amplifiers are arrayed along the optical fiber between the transmitter and the receiver for amplifying signal channel. Each amplifier comprises a pump light source, and its wavelength is such that a gain difference due to pump optical wavelength related to effect is substantially reduced. A WDM transmission system comprising a transmission channel containing longitudinal succession of the optical amplifier is also stated. Relating to a gain spectrum of the amplifier, at least a part of it is controlled by a feedback loop 25 which controls temperature of a laser diode pump 21. The feedback loop 25 derives a control signal based on measurement of for example, a drive current applied to the pump, emission wavelength of the pump, or none-equilibration between the output power from amplifier in one of multiplex signal channels and that from at least one of other channels, etc.
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公开(公告)号：JPH08320419A
公开(公告)日：1996-12-03
申请号：JP11433296
申请日：1996-04-12
Applicant: CORNING INC
Inventor： BERKEY GEORGE E , BHAGAVATULA VENKATA A , JONES PETER C , KECK DONALD B , LIU YANMING , MODAVIS ROBERT A , MORROW ALAN J , NEWHOUSE MARK A , NOLAN DANIEL A
IPC: G02B6/00 , C03B37/012 , C03B37/014 , C03B37/018 , C03B37/02 , C03B37/027 , G02B6/02 , G02B6/028 , G02B6/036 , G02B6/10 , G02B6/18 , G02B6/22
Abstract: PROBLEM TO BE SOLVED: To provide a single mode light waveguide fiber designed to restrict a power penalty due to four optics mixtures and a manufacturing method of that waveguide. SOLUTION: A characteristic change such as radius (diameter 83, 84) or refractive index, for example, of a waveguide fiber core gives all divergence along the length of a waveguide. An algebraic summation of multiples of the length and all divergence is controlled to a pre-selected value toward each waveguide constituting a system link. When the size and the small length part of the change of all divergence is properly selected, a system link with which a signal advances by a short distance in a waveguide part having all divergence close to zero is obtained. However, the change of all divergence gives the system link generating a distributed effect pre-selected for the signals in the wavelength range pre-selected. The distributed effect against the signals can be selected to be substantially zero. A veriety of techniques for manufacture of DM fibers is disclosed.
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3.发明申请PUMP WAVELENGTH TUNING OF OPTICAL AMPLIFIERS AND USE OF SAME IN WAVELENGTH DIVISION MULTIPLEXED SYSTEMS 审中-公开光学放大器的波导波长调谐及其在波长分割多用户系统中的应用
公开(公告)号：WO9836294A3
公开(公告)日：1998-10-29
申请号：PCT/US9802183
申请日：1998-01-30
Applicant: CORNING INC , NORTHERN TELECOM LTD
Inventor： BENNETT KEVIN W , DAVIS FIONA , HABEL RICHARD A , JAKOBSON PAUL A , JOLLEY NIGEL E , KEYS ROBERT W , ROBERTS KIM B , NEWHOUSE MARK A , YADLOWSKY MICHAEL J
IPC: H01S3/07 , H01S3/06 , H01S3/094 , H01S3/10 , H01S3/13 , H01S3/131 , H01S3/17 , H04B10/12 , H04B10/17 , H04J14/00 , H04J14/02 , G02B
CPC classification number: H04B10/2942 , H01S3/10069 , H01S3/1301 , H01S5/0612 , H01S5/0687 , H01S2301/04 , H04B10/2912 , H04B10/2935
Abstract: A transmission system is disclosed having a transmitter (11) and a receiver (10) connected by an optical fiber (12). A plurality of optical amplifiers (13) are located along the optical fiber (12) to amplify signal channels between the transmitter and receiver. Each of the amplifiers has a pump light source (21), the wavelength of which is such that contributions to differential gain due to pump light wavelength related effects is substantially reduced. Also disclosed is a WDM transmission system having a transmission path including a concatenation of laser diode pumped optical amplifiers (13) wherein the gain spectrum of an amplifier is controlled at least in part by a feedback loop regulating the temperature of its laser diode pump (21).
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公开(公告)号：DE69620274D1
公开(公告)日：2002-05-08
申请号：DE69620274
申请日：1996-01-12
Applicant: CORNING INC
Inventor： LIU YANMING , NEWHOUSE MARK A
Abstract: A single mode optical waveguide fiber is provided which is dispersion shifted for use over a wavelength range of about 1500 nm to 1600 nm and which reduces non-linear optical effects. The core region of the fiber has a central core segment with maximum refractive index n0, and an annular segment having a maximum index n,. There is a clad layer, having a refractive index nc, surrounding said core region, and n0 > n1 > nc. The fiber has a total dispersion zero within the waveguide range of about 1500 nm to 1600 nm, but outside the limits from about 1540 nm to 1560 nm, an effective area of about 70 microns or greater, and a dispersion slope of about 0.12 ps/nm -km or less.
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公开(公告)号：BR9800632A
公开(公告)日：1999-10-05
申请号：BR9800632
申请日：1998-02-17
Applicant: CORNING INC , NORTHERN TELECOM LTD
Inventor： BENNETT KEVIN W , DAVIS FIONA , HABEL RICHARD A , JAKOBSON PAUL A , JOLLEY NIGEL E , KEYS ROBERT W , ROBERTS KIM BYRON , NEWHOUSE MARK A , YADLOWSKY MICHAEL J
IPC: H01S3/07 , H01S3/06 , H01S3/094 , H01S3/10 , H01S3/13 , H01S3/131 , H01S3/17 , H04B10/12 , H04B10/17 , H04J14/00 , H04J14/02 , G02F1/025
Abstract: The variables and parameters previously understood to affect the gain spectrum of an optical amplifier 13 were: (1) the wavelengths to be amplified; (2) the input power levels at those wavelengths; (3) the characteristics of the amplifying medium 20; (4) the insertion loss spectra of the amplifier's components, including any filter(s) used for gain flattening; (5) the pump band chosen to pump the amplifying medium 20; and (6) the total amount of pump power supplied in the chosen pump band. An additional fundamental variable has been identified which can be used to control the gain spectrum of an optical amplifier 13, namely, the center wavelength of the spectrum of the pump's output power within the chosen pump band. Methods and apparatus for using this variable for this purpose are disclosed. For example a, transmission system is disclosed having a transmitter 11 and a receiver 10 connected by an optical fiber 12. A plurality of optical amplifiers 13 are located along the optical fiber 12 to amplify signal channels between the transmitter and receiver. Each of the amplifiers has a pump light source 21, the wavelength of which is such that contributions to differential gain due to pump light wavelength related effects is substantially reduced. Also disclosed is a WDM transmission system having a transmission path including a concatenation of laser diode pumped optical amplifiers 13 wherein the gain spectrum of an amplifier is controlled at least in part by a feedback loop regulating the temperature of its laser diode pump 21. The feedback loop may for instance derive its control signal from a measure of the drive current applied to the pump, of the emission wavelength of the pump, or of the disparity between the power output from the amplifier in one of the multiplexed signal channels and that from at least one other of the channels.
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Patent Agency Ranking
公开(公告)号：CA2228122A1
公开(公告)日：1998-08-17
申请号：CA2228122
申请日：1998-01-28
Applicant: CORNING INC , NORTHERN TELECOM LTD
Inventor： YADLOWSKY MICHAEL J , BENNETT KEVIN W , ROBERTS KIM BYRON , DAVIS FIONA , KEYS ROBERT W , NEWHOUSE MARK A , JOLLEY NIGEL E , JAKOBSON PAUL A , HABEL RICHARD A
IPC: H01S3/07 , H01S3/06 , H01S3/094 , H01S3/10 , H01S3/13 , H01S3/131 , H01S3/17 , H04B10/12 , H04B10/17 , H04J14/00 , H04J14/02
Abstract: The variables and parameters previously understood to affect the gain spectrum of an optical amplifier 13 were: (1) the wavelengths to be amplified; (2) the input power levels at those wavelengths; (3) the characteristics of the amplifying medium 20; (4) the insertion loss spectra of the amplifier's components, including any filter(s) used for gain flattening; (5) the pump band chosen to pump the amplifying medium 20; and (6) the total amount of pump power supplied in the chosen pump band. An additional fundamental variable has been identified which can be used to control the gain spectrum of an optical amplifier 13, namely, the center wavelength of the spectrum of the pump's output power within the chosen pump band. Methods and apparatus for using this variable for this purpose are disclosed. For example a, transmission system is disclosed having a transmitter 11 and a receiver 10 connected by an optical fiber 12. A plurality of optical amplifiers 13 are located along the optical fiber 12 to amplify signal channels between the transmitter and receiver. Each of the amplifiers has a pump light source 21, the wavelength of which is such that contributions to differential gain due to pump light wavelength related effects is substantially reduced. Also disclosed is a WDM transmission system having a transmission path including a concatenation of laser diode pumped optical amplifiers 13 wherein the gain spectrum of an amplifier is controlled at least in part by a feedback loop regulating the temperature of its laser diode pump 21. The feedback loop may for instance derive its control signal from a measure of the drive current applied to the pump, of the emission wavelength of the pump, or of the disparity between the power output from the amplifier in one of the multiplexed signal channels and that from at least one other of the channels.
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公开(公告)号：AU4584997A
公开(公告)日：1998-04-24
申请号：AU4584997
申请日：1997-09-18
Applicant: CORNING INC
Inventor： NEWHOUSE MARK A , YADLOWSKY MICHAEL J
Abstract: A hybrid, erbium doped fiber amplifier device has a dynamic gain tilt that is less than the gain tilt of any of the constituent fibers. The hybrid amplifying device has at most one less pumping source than the number of constituent waveguides of the device. The hybrid device automatically provides an effective change in the pump distribution among the constituent doped waveguide sections so as to achieve a readjustment of the relative gains of the constituent sections. As such, a change in the aggregate gain of the hybrid device will be as nearly spectrally uniform as possible over a range of gain values compared to the constituent doped waveguides. A method for constructing a hybrid optical amplifying device having improved dynamic gain tilt is also provided.
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公开(公告)号：CA2143531A1
公开(公告)日：1995-10-12
申请号：CA2143531
申请日：1995-02-28
Applicant: CORNING INC
Inventor： AITKEN BRUCE G , NEWHOUSE MARK A
Abstract: This invention is directed broadly to transparent glasses exhibiting excellent transmission far into the infrared region of the electromagnetic radiation spectrum, those glasses consisting essentially, expressed in terms of mole percent, of 40-80% Ga2S3, 0-35% RSx, wherein R is at least one network forming cation selected from the group consisting of aluminum, antimony, arsenic, germanium, and indium, 1-50% Ln2S3, wherein Ln is at least one cation selected from the group consisting of a rare earth metal cation and yttrium, 1-45% MSx, wherein M is at least one modifying metal cation selected from the group consisting of barium, cadmium, calcium, lead, lithium, mercury, potassium, silver, sodium, strontium, thallium, and tin, and 0-10% total chloride and/or fluoride. Glass compositions consisting essentially, expressed in terms of mole percent, of 5-30% Ga2S3, 0-10% R2S3, wherein R is at least one network forming cation selected from the group consisting of aluminum, antimony, arsenic, and indium, 55-94.5% GeS2, 0.525% MSx, wherein M is at least one modifying metal cation selected from the group consisting of barium, cadmium, calcium, lead, lithium, potassium, silver, sodium, strontium, tin, yttrium, and a rare earth metal of the lanthanide series, 0-10% total selenide, 0-25% total chloride and/or fluoride, and wherein the sulfur and/or selenium content can vary between 85-125% of the stoichiometric value when doped with Pr demonstrate exceptionally high values of ?.
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公开(公告)号：AU6239199A
公开(公告)日：2000-03-27
申请号：AU6239199
申请日：1999-08-13
Applicant: CORNING INC
Inventor： MCNAMARA THOMAS W , NEWHOUSE MARK A
Abstract: A method for tuning and improving the performance of an optical communication system comprising al link that includes optical amplifiers and, optionally, active and/or passive optical components such as, e.g., DWDM's, WADM's, and optical cross-connects, includes preferentially shaping and, in particular, flattening, with respect to the input power spectrum, the output power spectrum from the amplifier, component or of the link. A flattened output power spectrum is obtained by modifying the gain spectrum operating on the respective input power spectrum. Feedback for such gain modification is typically provided by optimizing the optical signal to noise ratio of each channel of the respective output power spectrum. A system link, an optical amplifier, and optical components having flattened output power spectra are also described.
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公开(公告)号：AU717084B2
公开(公告)日：2000-03-16
申请号：AU4584997
申请日：1997-09-18
Applicant: CORNING INC
Inventor： NEWHOUSE MARK A , YADLOWSKY MICHAEL J
Abstract: A hybrid, erbium doped fiber amplifier device has a dynamic gain tilt that is less than the gain tilt of any of the constituent fibers. The hybrid amplifying device has at most one less pumping source than the number of constituent waveguides of the device. The hybrid device automatically provides an effective change in the pump distribution among the constituent doped waveguide sections so as to achieve a readjustment of the relative gains of the constituent sections. As such, a change in the aggregate gain of the hybrid device will be as nearly spectrally uniform as possible over a range of gain values compared to the constituent doped waveguides. A method for constructing a hybrid optical amplifying device having improved dynamic gain tilt is also provided.
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