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1.发明专利
公开(公告)号：JPH10154959A
公开(公告)日：1998-06-09
申请号：JP31775297
申请日：1997-11-05
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： GAMBINI PIERO , PULEO MARIO
IPC: H04B10/04 , H04B10/00 , H04B10/06 , H04B10/08 , H04B10/142 , H04B10/152 , H04B10/22 , H04L7/00
Abstract: PROBLEM TO BE SOLVED: To provide the method and device to control accurately a phase of a clock signal transferred along with an optical fiber between two points. SOLUTION: A signal to be controlled is sent along with an optical fiber 3 by a wavelength tunable laser 2 whose radiation wavelength is varied as a function of possible phase fluctuation in a reception signal with respect to a reference phase. At a receiving end of the optical fiber 3, part of power of the reception signal is extracted and sent back toward a transmission end, then a control signal is generated. At a transmitter end, a phase of part of the power is compared with a phase of an original signal and the tunable laser 2 is driven so that clock information with a wavelength is sent to be reached to the receiving end having the reference phase.
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公开(公告)号：CA2220244C
公开(公告)日：2001-04-03
申请号：CA2220244
申请日：1997-11-05
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： PULEO MARIO , GAMBINI PIERO
IPC: H04B10/04 , H04B10/00 , H04B10/06 , H04B10/08 , H04B10/142 , H04B10/152 , H04B10/22 , H04L7/00 , H04L7/033 , H04B10/12
Abstract: The signal to be controlled is sent along an optical fibre (3) by means of a wavelength tunable laser (2) whose emission wavelength may be varied as a fu nction of a possible phase variation in the received signal with respect to a refer ence phase. At the receiving end of the fibre a control signal is generated by extractin g a fraction of the power associated with the received signal and sending such fraction back towards the transmitting end, and at the transmitting end the phase of said fraction is compared with that of the original signal and the tunable laser is driven (2) in such a way as to transmit at a wavelength such that the clock information reaches the receivi ng end with the reference phase.
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公开(公告)号：CA2111642A1
公开(公告)日：1994-06-18
申请号：CA2111642
申请日：1993-12-16
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： CAVACIUTI ALESSANDRO , PULEO MARIO
IPC: H01S5/06 , H01S5/50 , H04B10/291 , H04B10/50 , H04B10/18
Abstract: A laser device, if directly amplitude modulated, exhibits an unwanted frequency modulation which broadens its emission spectrum. The unwanted frequency modulation is eliminated by carrying out a conversion of the modulated optical signal wavelength, using a semiconductor optical amplifier as a converter and another nonmodulated laser as a conversion signal generator. Wavelength conversion takes place in the amplifier due to gain modulation induced by saturation. An output signal at the conversion signal frequency, taken from a filter following the converter, presents an amplitude modulation equal and opposite to that of the modulated signal at input, but does not show frequency modulation.
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公开(公告)号：DE69327365T2
公开(公告)日：2000-05-25
申请号：DE69327365
申请日：1993-05-24
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： CAVACIUTI ALESSANDRO , PULEO MARIO
Abstract: Optical demultiplexing system, wherein from an optical carrier modulated by a TDM data flow the wanted tributary is extracted as an optical signal. The system makes use of a semiconductor optical amplifier, whose gain is modulated due to saturation effect. The amplifier receives both the modulated optical carrier and one or a plurality of sampling optical carriers, with wavelengths different from that of the modulated carrier. One or a plurality of optical filters supply at the output the tributaries by extracting from the amplifier output the sampling carriers modulated by data signals.
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公开(公告)号：ITTO960896D0
公开(公告)日：1996-11-07
申请号：ITTO960896
申请日：1996-11-07
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： GAMBINI PIERO , PULEO MARIO
IPC: H04B10/04 , H04B10/00 , H04B10/06 , H04B10/08 , H04B10/142 , H04B10/152 , H04B10/22 , H04L7/00
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Patent Agency Ranking
公开(公告)号：DE572890T1
公开(公告)日：1994-07-28
申请号：DE93108342
申请日：1993-05-24
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： CAVACIUTI ALESSANDRO , PULEO MARIO
Abstract: Optical demultiplexing system, wherein from an optical carrier modulated by a TDM data flow the wanted tributary is extracted as an optical signal. The system makes use of a semiconductor optical amplifier, whose gain is modulated due to saturation effect. The amplifier receives both the modulated optical carrier and one or a plurality of sampling optical carriers, with wavelengths different from that of the modulated carrier. One or a plurality of optical filters supply at the output the tributaries by extracting from the amplifier output the sampling carriers modulated by data signals.
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公开(公告)号：CA2096771A1
公开(公告)日：1993-11-27
申请号：CA2096771
申请日：1993-05-21
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： CAVACIUTI ALESSANDRO , PULEO MARIO
Abstract: Optical demultiplexing system, wherein from an optical carrier modulated by a TDM data flow the wanted tributary is extracted as an optical signal. The system makes use of a semiconductor optical amplifier, whose gain is modulated due to saturation effect. The amplifier receives both the modulated optical carrier and one or a plurality of sampling optical carriers, with wavelengths different from that of the modulated carrier. One or a plurality of optical filters supply at the output the tributaries by extracting from the amplifier output the sampling carriers modulated by data signals.
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公开(公告)号：ITTO920443D0
公开(公告)日：1992-05-26
申请号：ITTO920443
申请日：1992-05-26
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： CAVACIUTI ALESSANDRO , PULEO MARIO
Abstract: Optical demultiplexing system, wherein from an optical carrier modulated by a TDM data flow the wanted tributary is extracted as an optical signal. The system makes use of a semiconductor optical amplifier, whose gain is modulated due to saturation effect. The amplifier receives both the modulated optical carrier and one or a plurality of sampling optical carriers, with wavelengths different from that of the modulated carrier. One or a plurality of optical filters supply at the output the tributaries by extracting from the amplifier output the sampling carriers modulated by data signals.
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公开(公告)号：IT1311257B1
公开(公告)日：2002-03-04
申请号：ITTO990930
申请日：1999-10-26
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： PULEO MARIO
Abstract: The component (1), located inside a corresponding package (P), is associated with a first heat sensor (3), located in proximity to the component (1) inside the package (P), together with a second heat sensor (11). The means of thermal conditioning (4) are controlled in such a way as to keep the temperature of the first sensor (3) at a level identified by a reference signal (rifv). The second sensor (11) is associated with the said package (P) in such a way as to generate a second temperature signal indicating the external temperature, and the aforesaid reference signal (rifv) is modified as a function of the said second temperature signal, providing effective temperature control of the component (1).
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10.发明专利
公开(公告)号：CA2220244A1
公开(公告)日：1998-05-07
申请号：CA2220244
申请日：1997-11-05
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： GAMBINI PIERO , PULEO MARIO
IPC: H04B10/04 , H04B10/00 , H04B10/06 , H04B10/08 , H04B10/142 , H04B10/152 , H04B10/22 , H04L7/00 , H04L7/033 , H04B10/12
Abstract: The signal to be controlled is sent along an optical fibre (3) by means of a wavelength tunable laser (2) whose emission wavelength may be varied as a functi on of a possible phase variation in the received signal with respect to a reference phase. At the receiving end of the fibre a control signal is generated by extracting a fraction of the power associated with the received signal and sending such fraction back tow ards the transmitting end, and at the transmitting end the phase of said fraction is compared with that of the original signal and the tunable laser is driven (2) in such a w ay as to transmit at a wavelength such that the clock information reaches the receiving e nd with the reference phase.
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