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公开(公告)号：JP2001311973A
公开(公告)日：2001-11-09
申请号：JP2001056619
申请日：2001-03-01
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ACKERMAN DAVID ALAN , BACHER KENNETH L , DAUTREMONT-SMITH WILLIAM C , DU MEI , ROTTWITT KARSTEN , STENTZ ANDREW J , STRASSER THOMAS ANDREW , ZHANG LIMING
Abstract: PROBLEM TO BE SOLVED: To provide a co-propagating Raman amplifying system which provides a sufficient on-off gain without causing pump signal crosstalk and signal pump signal crosstalk at unwanted level, and makes the device useful. SOLUTION: A fiber Raman amplifier is configured to use a co-propagating Raman pumping source, and this is advantageous in various system configurations. One example is a bi-directional communication system. A sufficient optical gain can be obtained with the co-propagating system by carefully configuring pumping source characteristics. These characteristics include the points such as (1) to use at least 50mW optical pump power, (2) to have a relatively large spectrum bandwidth in the pump for suppressing SBS, (3) a frequency difference among all the vertical pump modes of each pump laser is separated by at least a walk-off frequency between a pump laser frequency and a signal frequency, and all the strong vertical modes among individual pump laser are separated by at least an electric frequency bandwidth of a communication system.
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公开(公告)号：CA2335166C
公开(公告)日：2005-01-11
申请号：CA2335166
申请日：2001-02-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ACKERMAN DAVID ALAN , ROTTWITT KARSTEN , STENTZ ANDREW JOHN , STRASSER THOMAS ANDREW , ZHANG LIMING , DU MEI , BACHER KENNETH L , DAUTREMONT-SMITH WILLIAM CROSS
Abstract: A fiber Raman amplifier is configured to use a co-propagating Raman pum p source, which may be beneficial in a variety of system configurations (for example, in bidirectional communication systems). By carefully configuring the pump sour ce characteristics, sufficient optical gain can be achieved in the co-propagati ng arrangement, the characteristics including: (1) using an optical pump power of at least 50mW, (2) having a relatively large spectral bandwidth within the pump (to suppress SBS); and (3) a frequency difference between all longitudinal pump modes of each pump laser being separated by at least the walk-off frequency between the pu mp laser frequency and the signal frequency, and all intense longitudinal modes betwe en different pump lasers being separated by at least the electrical bandwidth o f the communication system.
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公开(公告)号：DE60133960D1
公开(公告)日：2008-06-26
申请号：DE60133960
申请日：2001-02-19
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ACKERMAN DAVID ALAN , BACHER KENNETH L , DAUTREMONT-SMITH WILLIAM , DU MEI , ROTTWITT KARSTEN , STENTZ ANDREW JOHN , STRASSER THOMAS ANDREW , ZHANG LIMING
Abstract: A fiber Raman amplifier is configured to use a co-propagating Raman pump source, which may be beneficial in a variety of system configurations (for example, in bidirectional communication systems). By carefully configuring the pump source characteristics, sufficient optical gain can be achieved in the co-propagating arrangement, the characteristics including: (1) using an optical pump power of at least 50mW, (2) having a relatively large spectral bandwidth within the pump (to suppress SBS); and (3) a frequency difference between all longitudinal pump modes of each pump laser being separated by at least the walk-off frequency between the pump laser frequency and the signal frequency, and all intense longitudinal modes between different pump lasers being separated by at least the electrical bandwidth of the communication system.
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公开(公告)号：CA2335166A1
公开(公告)日：2001-09-03
申请号：CA2335166
申请日：2001-02-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ZHANG LIMING , STRASSER THOMAS ANDREW , DU MEI , ACKERMAN DAVID ALAN , STENTZ ANDREW JOHN , ROTTWITT KARSTEN , BACHER KENNETH L , DAUTREMONT-SMITH WILLIAM CROSS
Abstract: A fiber Raman amplifier is configured to use a co-propagating Raman pum p source, which may be beneficial in a variety of system configurations (for example, in bidirectional communication systems). By carefully configuring the pump sour ce characteristics, sufficient optical gain can be achieved in the co-propagati ng arrangement, the characteristics including: (1) using an optical pump power of at least 50mW, (2) having a relatively large spectral bandwidth within the pump (to suppress SBS); and (3) a frequency difference between all longitudinal pump modes of each pump laser being separated by at least the walk-off frequency between the pu mp laser frequency and the signal frequency, and all intense longitudinal modes betwe en different pump lasers being separated by at least the electrical bandwidth o f the communication system.
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