-
公开(公告)号：JPH10268370A
公开(公告)日：1998-10-09
申请号：JP7633198
申请日：1998-03-24
Applicant: LUCENT TECHNOLOGIES INC
Inventor： JOPSON ROBERT MEACHEM
Abstract: PROBLEM TO BE SOLVED: To obtain a desired optical channel having desired corresponding time delay by arranging a filter which selects a specific 'teeth' in an optical frequency comb on the output side of an optical comb generating device. SOLUTION: The optical frequency comb 122 has many channels which are separated in terms of time and frequency. The frequency interval between adjacent channels, i.e., 'teeth' of optical frequency combs 122 and 150 is determined by the frequency of a shifting signal applied to optical comb generating devices 126A and 126B. The time delay of the respective 'teeth' of the optical frequency combs 122 and 150 is equal to the frequency at which signals of the 'teeth' make rounds of an optical fiber loop of the optical comb generating devices 126A and 126B. Filters 140 and 142 which specify specific 'teeth' in the optical frequency combs 122 and 150 are arranged on the output sides of the optical comb generating devices 126A and 126B to obtain a desired optical channel having desired corresponding time delay.
-
公开(公告)号：JP2000244399A
公开(公告)日：2000-09-08
申请号：JP2000037111
申请日：2000-02-15
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHRAPLYVY ANDREW ROMAN , JOPSON ROBERT MEACHEM , SRIVASTAVA ATUL KUMAR , SULHOFF JAMES WILLIAM , SUN YAN
IPC: H01S5/50 , H04B10/00 , H04B10/02 , H04B10/17 , H04B10/18 , H04B10/29 , H04J14/00 , H04J14/02 , H04B10/16
Abstract: PROBLEM TO BE SOLVED: To realize communication without substantially an error by detecting transmitted bits in an amplified optical signal according to detection thresholds derived as a function of the maximum power level corresponding to the first bit value and the minimum power level corresponding to the second bit value. SOLUTION: In a receiver opart 650, a band-pass filter 651 is used for selecting one channel at once for a proper measurement, for example, a BER or eye measurement. To put it concretely, bits in 12 channels using the optimal detection threshold level are detected by using a detector 652. The other components in the receiver part 650 are used for applying pre-amplification to an erbium-dopes fiber amplifier 660. A light attenuator 661 and an eye monitor 662 are used for simplifying the measurement of an input signal pattern. An attenuator 663 is used for simplifying the measurements of the power and bit error rate of a received signal.
-
公开(公告)号：JPH1174970A
公开(公告)日：1999-03-16
申请号：JP7988498
申请日：1998-03-26
Applicant: LUCENT TECHNOLOGIES INC
Inventor： JOPSON ROBERT MEACHEM
Abstract: PROBLEM TO BE SOLVED: To provide the processing method of a telephone call routed by an unsuitable incoming exchange. SOLUTION: In the processing method of a telephone call to the exchange of an incoming call telephone company 108 which does not deal with a called telephone number, a calling exchange 117 accesses to the data base 118 of the exchange 117 for routing the call. The call is routed to the exchange of the incoming call telephone company 108 based on obtained data. The calling exchange 117 receives the release message of effect that a line corresponding to the number of the call cannot be detected from the exchange of the incoming call telephone company 108. A local number transfer concentration data base 115 which the plural exchanges share is accessed and an obtained response is compared with data of the data base 118. When both data are not matched, the data base 118 of the exchange 117 is updated by data obtained from the concentration data base 115.
-
公开(公告)号：CA2298272A1
公开(公告)日：2000-08-19
申请号：CA2298272
申请日：2000-02-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHRAPLYVY ANDREW ROMAN , JOPSON ROBERT MEACHEM , SRIVASTAVA ATUL KUMAR , SULHOFF JAMES WILLIAM , SUN YAN
IPC: H01S5/50 , H04B10/00 , H04B10/02 , H04B10/17 , H04B10/18 , H04B10/29 , H04J14/00 , H04J14/02 , H04B10/16
Abstract: Substantially error-free communications is achieved in an optical communication system that includes optical amplifiers by detecting bits transmitted in the amplified optical signal using a detection threshold that is derived as a function of a maximum power level associated with a first bit value, e.g., bit "0", and a minimum power level associated with a second bit value, e.g., bit "I". Importantly, this detection scheme can be used to accurately detect bit patterns in the amplified signal even in the presence of nonlinear distortions caused by gain variations, such as inter-modal distortion and saturation induced crosstalk. In a wavelength division multiplexed (WDM) system comprising semiconductor optical amplifiers, for example, the detection threshold can be set at a level corresponding to P TOTAL/2N, where P TOTAL represents the total power in the WDM signal and N represents the number of optical channels in the WDM signal. According to another aspect of the invention, the effect of gain fluctuations becomes smaller as the number of channels increase. In particular, a smoothing effect is realized for the total effective saturation power as gain variations decrease as a function of an increase in the number of channels. As such, the performance of a semiconductor optical amplifier according to the principles of the invention approaches the linear performance of fiber amplifiers as the number of channels increases.
-
公开(公告)号：DE60036891D1
公开(公告)日：2007-12-13
申请号：DE60036891
申请日：2000-02-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHRAPLYVY ANDREW ROMAN , JOPSON ROBERT MEACHEM , SRIVASTAVA ATUL KUMAR , SULHOFF JAMES WILLIAM , SUN YAN
Abstract: Substantially error-free communications is achieved in an optical communication system that includes optical amplifiers by detecting bits transmitted in the amplified optical signal using a detection threshold that is derived as a function of a maximum power level associated with a first bit value, e.g., bit "0", and a minimum power level associated with a second bit value, e.g., bit "1". Importantly, this detection scheme can be used to accurately detect bit patterns in the amplified signal even in the presence of nonlinear distortions caused by gain variations, such as inter-modal distortion and saturation induced crosstalk. In a wavelength division multiplexed (WDM) system comprising semiconductor optical amplifiers, for example, the detection threshold can be set at a level corresponding to PTOTAL/2N, where PTOTAL represents the total power in the WDM signal and N represents the number of optical channels in the WDM signal. According to another aspect of the invention, the effect of gain fluctuations becomes smaller as the number of channels increase. In particular, a smoothing effect is realized for the total effective saturation power as gain variations decrease as a function of an increase in the number of channels. As such, the performance of a semiconductor optical amplifier according to the principles of the invention approaches the linear performance of fiber amplifiers as the number of channels increases.
-
Patent Agency Ranking
公开(公告)号：AU1643000A
公开(公告)日：2000-08-24
申请号：AU1643000
申请日：2000-02-15
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHRAPLYVY ANDREW ROMAN , SUN YAN , SULHOFF JAMES WILLIAM , SRIVASTAVA ATUL KUMAR , JOPSON ROBERT MEACHEM
Abstract: Substantially error-free communications is achieved in an optical communication system that includes optical amplifiers by detecting bits transmitted in the amplified optical signal using a detection threshold that is derived as a function of a maximum power level associated with a first bit value, e.g., bit "0", and a minimum power level associated with a second bit value, e.g., bit "1". Importantly, this detection scheme can be used to accurately detect bit patterns in the amplified signal even in the presence of nonlinear distortions caused by gain variations, such as inter-modal distortion and saturation induced crosstalk. In a wavelength division multiplexed (WDM) system comprising semiconductor optical amplifiers, for example, the detection threshold can be set at a level corresponding to PTOTAL/2N, where PTOTAL represents the total power in the WDM signal and N represents the number of optical channels in the WDM signal. According to another aspect of the invention, the effect of gain fluctuations becomes smaller as the number of channels increase. In particular, a smoothing effect is realized for the total effective saturation power as gain variations decrease as a function of an increase in the number of channels. As such, the performance of a semiconductor optical amplifier according to the principles of the invention approaches the linear performance of fiber amplifiers as the number of channels increases.
-
公开(公告)号：DE69839684D1
公开(公告)日：2008-08-21
申请号：DE69839684
申请日：1998-03-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： JOPSON ROBERT MEACHEM
Abstract: A time delay device for an optical signal wherein an optical frequency comb is generated by a comb generation device. The optical frequency comb consists of a plurality of discrete and temporally spaced optical channels or carriers. The separation of the channels is dictated by the shifting frequency applied to the comb generation device and the temporal spacing is defined by the length of fiber used so that a time delay is created for each traverse of the fiber loop by the optical frequency comb. A filter connected to the comb generation device is used for tuning to a particular frequency or channel in the optical comb to obtain an optical signal having a desired time delay.
-
公开(公告)号：DE60036891T2
公开(公告)日：2008-08-07
申请号：DE60036891
申请日：2000-02-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHRAPLYVY ANDREW ROMAN , JOPSON ROBERT MEACHEM , SRIVASTAVA ATUL KUMAR , SULHOFF JAMES WILLIAM , SUN YAN
Abstract: Substantially error-free communications is achieved in an optical communication system that includes optical amplifiers by detecting bits transmitted in the amplified optical signal using a detection threshold that is derived as a function of a maximum power level associated with a first bit value, e.g., bit "0", and a minimum power level associated with a second bit value, e.g., bit "1". Importantly, this detection scheme can be used to accurately detect bit patterns in the amplified signal even in the presence of nonlinear distortions caused by gain variations, such as inter-modal distortion and saturation induced crosstalk. In a wavelength division multiplexed (WDM) system comprising semiconductor optical amplifiers, for example, the detection threshold can be set at a level corresponding to PTOTAL/2N, where PTOTAL represents the total power in the WDM signal and N represents the number of optical channels in the WDM signal. According to another aspect of the invention, the effect of gain fluctuations becomes smaller as the number of channels increase. In particular, a smoothing effect is realized for the total effective saturation power as gain variations decrease as a function of an increase in the number of channels. As such, the performance of a semiconductor optical amplifier according to the principles of the invention approaches the linear performance of fiber amplifiers as the number of channels increases.
-
公开(公告)号：DE602005001187T2
公开(公告)日：2008-01-24
申请号：DE602005001187
申请日：2005-09-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHRAPLYVY ANDREW ROMAN , GNAUCK ALAN H , JOPSON ROBERT MEACHEM , RADIC STOJAN
IPC: G02F1/35
Abstract: A multi-pump phase modulator apparatus and operating method uses only one phase modulator (302) to eliminate SBS without degrading idler(s). The single phase modulator phase modulates multiple pump signals to form multiple phase modulated pump signals using a modulation signal (311,312) having a modulation period. A delay apparatus delays (306) a first wavelength group by the modulation period relative to other wavelength groups. A combiner (307) combines the delayed first wavelength group with the other wavelength groups to form a combined modulated multiple pump signal. In one embodiment a multi-pump phase parametric apparatus comprises the multi-pump phase modulator apparatus combined with a parametric apparatus (250) to generate an amplified input signal and one or more idlers . Other embodiments of the multi-pump phase conjugator apparatus are used as part of an Optical Switch, Sampler, Tributary Extractor, and Regenerator.
-
公开(公告)号：DE602005001187D1
公开(公告)日：2007-07-05
申请号：DE602005001187
申请日：2005-09-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHRAPLYVY ANDREW ROMAN , GNAUCK ALAN H , JOPSON ROBERT MEACHEM , RADIC STOJAN
IPC: G02F1/35
Abstract: A multi-pump phase modulator apparatus and operating method uses only one phase modulator (302) to eliminate SBS without degrading idler(s). The single phase modulator phase modulates multiple pump signals to form multiple phase modulated pump signals using a modulation signal (311,312) having a modulation period. A delay apparatus delays (306) a first wavelength group by the modulation period relative to other wavelength groups. A combiner (307) combines the delayed first wavelength group with the other wavelength groups to form a combined modulated multiple pump signal. In one embodiment a multi-pump phase parametric apparatus comprises the multi-pump phase modulator apparatus combined with a parametric apparatus (250) to generate an amplified input signal and one or more idlers . Other embodiments of the multi-pump phase conjugator apparatus are used as part of an Optical Switch, Sampler, Tributary Extractor, and Regenerator.
-
-
-
-
-
-
-
-
-
Search Results
11
records
(took 0.023 seconds)
