公开(公告)号：DE602005000298T2

公开(公告)日：2007-07-05

申请号：DE602005000298

申请日：2005-07-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KILPER DANIEL CHARLES ,  RAGHAVAN NARASIMHAN ,  RICHEY ELIZABETH O ,  TAEGER SYDNEY A ,  WHITE CHRISTOPHER ALAN

IPC: H04J14/02 ,  H04B10/17 ,  H04B10/29

Abstract: A channel-growth plan for an optical transmission system selects channels such that the transients that result in the channels that survive a network failure, such as an upstream fiber cut, are either minimized or effectively handled by some transient-control technique. In one embodiment, the growth plan may try to keep post-transient surviving channel total power gain equal to the pre-transient total power gain. Alternatively, the growth plan may try to distribute the surviving channels uniformly over the pre-transient channel-frequency range. Other manifestations are to keep (1) the average power of the surviving channels substantially equal to the average power of the pre-transient channels or (2) the average power of the post-transient surviving channels substantially equal to the power level of a specified channel. Transient-control can be balanced with conventional low-cost and high-performance goals to provide an effective hybrid channel-growth plan.

公开(公告)号：DE602005000298D1

公开(公告)日：2007-01-11

申请号：DE602005000298

申请日：2005-07-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KILPER DANIEL CHARLES ,  RAGHAVAN NARASIMHAN ,  RICHEY ELIZABETH O ,  TAEGER SYDNEY A ,  WHITE CHRISTOPHER ALAN

IPC: H04J14/02 ,  H04B10/17 ,  H04B10/29

Abstract: A channel-growth plan for an optical transmission system selects channels such that the transients that result in the channels that survive a network failure, such as an upstream fiber cut, are either minimized or effectively handled by some transient-control technique. In one embodiment, the growth plan may try to keep post-transient surviving channel total power gain equal to the pre-transient total power gain. Alternatively, the growth plan may try to distribute the surviving channels uniformly over the pre-transient channel-frequency range. Other manifestations are to keep (1) the average power of the surviving channels substantially equal to the average power of the pre-transient channels or (2) the average power of the post-transient surviving channels substantially equal to the power level of a specified channel. Transient-control can be balanced with conventional low-cost and high-performance goals to provide an effective hybrid channel-growth plan.

公开(公告)号：DE602005009293D1

公开(公告)日：2008-10-09

申请号：DE602005009293

申请日：2005-07-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KILPER DANIEL CHARLES ,  MARTELL CLAUDE A ,  RAGHAVAN NARASIMHAN ,  SADLER DAVID A ,  WHITE CHRISTOPHER ALAN

IPC: H04J14/02 ,  H04B10/17 ,  H04B10/29

Abstract: In an optical transmission system, operations of certain elements are adjusted in an individualized manner after detecting a change in the total optical power level corresponding to multiple optical channels in a link of the system in order to control transients in those channels. For example, in response to a sudden drop in the number of channels resulting from a fiber cut, the power levels of the optical pumps in a Raman amplifier in an OADM are adjusted to reduce transient gain errors in the surviving channels, where the adjustment to the pump power level for each different optical pump is a function of both the detected change in the total optical power level and at least one specified coefficient for that particular optical pump, in order to handle non-linearities in the response of the Raman amplifier to the sudden drop in the number of optical channels.