-
1.发明专利
公开(公告)号：JPH11331128A
公开(公告)日：1999-11-30
申请号：JP4084299
申请日：1999-02-19
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BOIVIN LUC , KNOX WAYNE HARVEY , NUSS MARTIN C , STARK JASON BLAIN
IPC: H04J14/08 , H04B10/02 , H04B10/155 , H04J14/00 , H04J14/02
Abstract: PROBLEM TO BE SOLVED: To overcome restriction on the aspect of a capacity which a chirped pulse WDM(wavelength division multiplexing) system holds by further optically multiplexing the chirped pulse wavelength dividing signal. SOLUTION: An optical pulse with a band width exceeding 80 nm is extracted from a mode-locked (fixed) laser 202 with the speed of 36.7 MHz. The spectrum of each pulse is mapper on a time axis by being propagated through a part extending over 16 km of a single mode chirping fiber 204, and the pulse is extended. The chirped pulse is propagated to a modulator 210 through a circulator 207 and a polarization controller 208. After being amplified by a gain- flattened erbium-doped fiber power amplifier(EDFA) 212, this data flow is inputted to an optical multiplexer 214 which is used in an experiment for multiplexing a pseudo-data stream, and the bit rate of the data flow is increased by 64 times and becomes 2.35 Gb/s.
-
公开(公告)号：JP2001311972A
公开(公告)日：2001-11-09
申请号：JP2001076123
申请日：2001-03-16
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BOIVIN LUC , SARATHY JITEN
Abstract: PROBLEM TO BE SOLVED: To reduce an in-band crosstalk penalty in an add/drop device. SOLUTION: An optical switch includes a programmable light polarizing unit (POLCON) which receives an input optical signal and selects output signal polarization in response to a control signal. A polarizing beam splitter(PBS) splits the polarized signal selected from POLCON into 1st and 2nd orthogonally polarized signals. A feedback circuits couples a feedback signal presenting optical signal intensity of at least one orthogonally polarized signal with POLCON, and the POLCON uses it for adjusting the output signal polarization. The optical switch can be used with the input optical signal containing fixed or varying polarized light by using a single or two feedback signals. The optical switch is used a an optical add/drop unit, or can be included as a part of a wavelength division multiplexing(WDM) signal add/drop unit.
-
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.
-
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.
-
Patent Agency Ranking
公开(公告)号：DE60132728D1
公开(公告)日：2008-03-27
申请号：DE60132728
申请日：2001-03-12
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BOIVIN LUC , SARATHY JITEN
Abstract: An optical switch comprises a programmable optical polarization unit (POLCON) which receives an input optical signal and selects an output signal polarization in response to a control signal. A polarization beam splitter (PBS) splits the selected polarization signal from the POLCON into a first and second orthogonally polarized signals. A feedback circuit couples a feedback signal indicative of the optical signal strength of at least one of the orthogonally polarized signals back to the POLCON which uses it to adjust the output signal polarization. The optical switch may be used with input optical signals having fixed or varying polarizations by utilizing a single or two feedback signals, respectively. The optical switch may be used as an optical Add/Drop unit or incorporated as part of a wavelength division multiplexed (WDM) signal Add/Drop unit.
-
公开(公告)号：DE60132728T2
公开(公告)日：2009-01-29
申请号：DE60132728
申请日：2001-03-12
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BOIVIN LUC , SARATHY JITEN
Abstract: An optical switch comprises a programmable optical polarization unit (POLCON) which receives an input optical signal and selects an output signal polarization in response to a control signal. A polarization beam splitter (PBS) splits the selected polarization signal from the POLCON into a first and second orthogonally polarized signals. A feedback circuit couples a feedback signal indicative of the optical signal strength of at least one of the orthogonally polarized signals back to the POLCON which uses it to adjust the output signal polarization. The optical switch may be used with input optical signals having fixed or varying polarizations by utilizing a single or two feedback signals, respectively. The optical switch may be used as an optical Add/Drop unit or incorporated as part of a wavelength division multiplexed (WDM) signal Add/Drop unit.
-
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.
-
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.
-
公开(公告)号：CA2247610C
公开(公告)日：2003-04-15
申请号：CA2247610
申请日：1998-09-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BOIVIN LUC , FELDMAN ROBERT D , NUSS MARTIN C
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.
-
-
-
-
-
-
-
-
Search Results
9
records
(took 0.022 seconds)
