公开(公告)号：US20180248620A1

公开(公告)日：2018-08-30

申请号：US15965326

申请日：2018-04-27

Applicant: Juniper Networks, Inc.

Inventor： Qiang WANG ,  Yang YUE ,  Xuan HE

IPC: H04B10/079 ,  H04B10/532 ,  H04B10/564 ,  H04B10/516

CPC classification number: H04B10/07955 ,  H04B10/5161 ,  H04B10/532 ,  H04B10/541 ,  H04B10/564

Abstract: In some embodiments, a non-transitory processor-readable medium storing code representing instructions to be executed by a processor comprises code to cause the processor to determine, during a calibration of a coherent optical transmitter, a set of parameters associated with each tributary channel by sending a first signal to a digital signal processor (DSP) to adjust a scale factor of that tributary channel. The scale factor is associated with a tap characteristic of a finite impulse response (FIR) filter of the DSP. The code further causes the processor to determine a power imbalance between two tributary channels based on the set of parameters associated with each tributary channel. The code further causes the processor to send a second signal to the coherent optical transmitter to adjust a set of operational settings of the coherent optical transmitter based on the power imbalance and the set of parameters associated with each tributary channel.

公开(公告)号：US20190342028A1

公开(公告)日：2019-11-07

申请号：US15970485

申请日：2018-05-03

Applicant: Juniper Networks, Inc.

Inventor： Xuan HE ,  Qiang WANG ,  Yang YUE

IPC: H04J14/06 ,  H04B10/61 ,  G02B6/12 ,  H04B10/2507

Abstract: In some embodiments, an apparatus includes a memory and a processor operatively coupled to the memory. The processor is configured to be operatively coupled to a first optical transponder and a second optical transponder. The processor is configured to receive, from the second optical transponder, a signal representing a skew value of an optical signal and a signal representing a bit-error-rate (BER) value of the optical signal. The skew value is associated with a skew between an in-phase component of the optical signal and a quadrature component of the optical signal. The processor is configured to determine, based on at least one of the skew value or the BER value, if a performance degradation of the first optical transponder satisfies a threshold. The processor is configured to send a control signal to the first optical transponder to adjust a pulse shaping or a data baud rate of the first optical transponder.