公开(公告)号：JP2002026818A

公开(公告)日：2002-01-25

申请号：JP2001163609

申请日：2001-05-31

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DELAVAUX JEAN-MARC PIERRE ,  YENIAY AYDIN

IPC: G02F1/03 ,  G02F1/11 ,  H01S5/042 ,  H04B10/02 ,  H04B10/18 ,  H04J14/00 ,  H04J14/04 ,  H04J14/06

Abstract: PROBLEM TO BE SOLVED: To provide an optical fiber transmission system which uses polarization multiplexing of a pump signal for reducing the influence of a stimulated Brillouin scattering(SBS) as for an optical fiber transmission system whose SBS is low. SOLUTION: A technique for suppressing the stimulated Brillouin scattering(SBS) in an optical fiber signal path divides power of emitted (signal) into (signals in) a polarization state by using polarization modulation at the place of a transmitter. By reducing the power of each polarization, the SBS is reduced. The line width of a light source is expanded by (1) introducing incoherence property between the polarization state (by introducing time delay into one of the signal paths in a polarization state) and (2) introducing a frequency shift between the polarizing state (by providing an acoustic optical modulator(AOM) within the signal path of the remaining polarization state).

公开(公告)号：JP2001217491A

公开(公告)日：2001-08-10

申请号：JP2000389859

申请日：2000-12-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DELAVAUX JEAN-MARC PIERRE ,  GREENBERG KOSONSKI SANDRA ,  YENIAY AYDIN

IPC: G02B6/00 ,  H01S3/06 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H04B10/00 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/29 ,  H04B10/16

Abstract: PROBLEM TO BE SOLVED: To reduce or remove residual pumping power while increasing the efficiency by a simultaneous doped Er3+-Yb3+ fiber amplifier. SOLUTION: The fiber amplifier 30 includes at least two rare earth doped optical fiber sections 32, 34. A pumping light source 38 is connected to one 34 of the fiber sections. The residual pumping power at the exit of the fiber section 34 is sent to a WDM(wavelength-division multiplexer) 46, which sends residual pumping light to the other fiber section 32 as a pumping signal input. The length of the fiber is determined based on a quantity of residual power existing in the output of the second section. In this example, the pumping signal is connected to the second section 34 and the residual pumping power is connected to the first section 32. Three or more fiber sections can be installed to build up multistage amplifier.

公开(公告)号：JP2001168441A

公开(公告)日：2001-06-22

申请号：JP2000289845

申请日：2000-09-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DELAVAUX JEAN-MARC PIERRE ,  YENIAY AYDIN

IPC: H01S3/23 ,  H01S3/06 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H04B10/17 ,  H04B10/29

Abstract: PROBLEM TO BE SOLVED: To provide a high-power optical amplifier which is effective for multiple-output applications, such as CATV and WDM systems. SOLUTION: This high-power optical amplifier 40 with multiple outputs is formed by using a preamplifier stage 42 (such as an erbium-doped fiber amplifier), followed by a power splitter 44 or wavelength division multiplexer router (forming the desired number of M separate optical outputs). Each preamplified and split output is then amplified separately in a high-power amplifier 46, such as an erbium-ytterbium co-doped amplifier. The power loss associated with the signal splitting thus occurs, prior to imparting of the high power gain onto the optical signals, allowing a plurality of high power optical outputs to be formed.

公开(公告)号：CA2342538C

公开(公告)日：2006-05-30

申请号：CA2342538

申请日：2001-04-03

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DELAVAUX JEAN-MARC PIERRE ,  YENIAY AYDIN

IPC: G02F1/03 ,  H04B10/12 ,  G02F1/11 ,  H01S5/042 ,  H04B10/02 ,  H04B10/18 ,  H04J14/00 ,  H04J14/04 ,  H04J14/06

Abstract: A technique for suppressing stimulated Brillouin scattering SBS along an optical fiber signal path utilizes polarization modulation at the transmitter to spl it the launched power into orthogonal polarization states. By reducing the power along each polarization, SBS will be reduced. Linewidth broadening of the optical sourc e is achieved by introducing: (1) a incoherence between the polarization states (using a time delay along the signal path of one polarization state); and (2) a frequency shift between the polarization states (using an acousto-optic modulator along the signal path of the remaining polarization state).

公开(公告)号：CA2342538A1

公开(公告)日：2001-11-30

申请号：CA2342538

申请日：2001-04-03

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DELAVAUX JEAN-MARC PIERRE ,  YENIAY AYDIN

IPC: G02F1/03 ,  G02F1/11 ,  H01S5/042 ,  H04B10/02 ,  H04B10/18 ,  H04J14/00 ,  H04J14/04 ,  H04J14/06 ,  H04B10/12

Abstract: A technique for suppressing stimulated Brillouin scattering SBS along an optical fiber signal path utilizes polarization modulation at the transmitter to spl it the launched power into orthogonal polarization states. By reducing the power along each polarization, SBS will be reduced. Linewidth broadening of the optical sourc e is achieved by introducing: (1) a incoherence between the polarization states (using a time delay along the signal path of one polarization state); and (2) a frequency shift between the polarization states (using an acousto-optic modulator along the signal path of the remaining polarization state).

公开(公告)号：CA2319280A1

公开(公告)日：2001-03-24

申请号：CA2319280

申请日：2000-09-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DELAVAUX JEAN-MARC PIERRE ,  YENIAY AYDIN

IPC: H01S3/23 ,  H01S3/06 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H04B10/17 ,  H04B10/29

Abstract: A high power optical amplifier with multiple outputs is formed by using a preamplifier stage (such as an EDFA), followed by a power splitter/WDM route r (forming the desired number of M separate optical outputs). Each preamplified/split output is then separately amplified in a high power amplifier, such as a erbium-ytterbium co-doped amplifier. The power loss associated wit h the signal splitting thus occurs prior to imparting the high power gain onto the optical signals, allowing for a plurality of high power optical outputs to b e formed.