公开(公告)号：US20230129521A1

公开(公告)日：2023-04-27

申请号：US17970730

申请日：2022-10-21

Applicant: ADVA Optical Networking SE

Inventor： Lutz Rapp

IPC: H04B10/2507

Abstract: Provided is a method for reducing the impact of transient effects in an optical network. The optical network includes at least one span, and an optical signal having a plurality of sub-bands travels through at least one span of the at least one span of the optical network. Each of the at least one span has associated amplifiers and the associated amplifiers are connected to launch optical signals into a remainder of a corresponding optical transmission line. Respectively one of the sub-bands of the optical signal traveling through the span is amplified by one of these associated amplifiers. Each of the associated amplifiers includes at least one control element for controlling gain and tilt of the corresponding amplifier. The method includes the steps of for each span, acquiring an actual value of at least one performance parameter; for each span, respectively computing actual settings for each of the control elements included in the amplifiers associated to the corresponding span based on the actual value of the at least one performance parameter of the corresponding span; and for each span, respectively adjusting the settings of each of the control elements included in the amplifiers associated to the corresponding span based on the computed actual settings for the corresponding control element, in order to reduce the impact of transient effects.

公开(公告)号：US20230076889A1

公开(公告)日：2023-03-09

申请号：US17941637

申请日：2022-09-09

Applicant: ADVA Optical Networking SE

Inventor： Michael RABINOVICH ,  Moshe TOFEF

IPC: H04J3/06

Abstract: There is provided a method of clock recovery and a system thereof. The method comprises: by master clock node or by client clock node, generating a first flow of time-stamped packets bearing indication of high priority of delivery and, in parallel, generating a second flow of time-stamped packets bearing indication of lower priority of delivery. By client clock node, processing the packets from the first flow separately from the packets from the second flow to define, separately for each flow, a function informative of changes of packets' delays in the respective flow over time; using the defined functions informative of changes of packets' delays in the first and the second flows over the same time intervals to assess a cause of the packets' delays changes; and applying a clock recovery algorithm in a manner differentiated in accordance with the assessed cause.

公开(公告)号：US11476948B2

公开(公告)日：2022-10-18

申请号：US17005393

申请日：2020-08-28

Applicant: ADVA Optical Networking SE

Inventor： Michael Eiselt

IPC: H04B10/61 ,  G02B6/293 ,  G02F1/21

Abstract: An optical endless phase shifting device includes a Mach-Zehnder structure operated in push-pull configuration and that creates a differential phase shift. The first stage outputs combined signals which are phase shifted by a phase shift of zero or π in the second stage by phase shifters provided in both arms of the second stage or in a first arm only. These additionally phase-shifted signals are combined to at least one output signal. A control device controls the phase shifters such that endless shifting capability is provided by switching one of the phase shifters or the single phase shifter of the second stage to the respective other value when the differential phase shift reaches a given range of the differential phase shift of [0;π/2] in the configuration with two phase shifters in the second stage or [0;π/2] in the configuration with only one phase shifters in the second stage.

公开(公告)号：US11307104B2

公开(公告)日：2022-04-19

申请号：US16832915

申请日：2020-03-27

Applicant: ADVA Optical Networking SE

Inventor： Michael Eiselt ,  Florian Azendorf

IPC: G01L1/24 ,  G01D21/02 ,  G01K11/3206

Abstract: The invention relates to a method for optically sensing a parameter of the group of temperature, humidity or mechanical stress using at least one optical sensor which includes a chirped Bragg grating and an optical reference reflector. The method includes the steps of; creating at least one optical probing signal having a predetermined center wavelength and a bandwidth that lies, for the whole range of the parameter to be sensed, within the reflection bandwidth of the chirped Bragg grating; feeding the at least one optical probing signal to the at least one optical sensor; receiving at least one optical reflection signal created by the at least one optical sensor, wherein the at least one optical reflection signal includes, for each of the at least one optical sensor, a first partial reflection signal created by the optical reference reflector and a second partial reflection signal created by the chirped Brag grating of the respective at least one optical sensor; measuring the group delay between the first and second partial reflection signal created by each of the at least one optical sensor; and determining, for each of the at least one optical sensors, an absolute or relative value of the at least one parameter using the group delay measured and a reference information. The invention further relates to a sensor arrangement for implementing the method as well as to an optical sensor that is suitable for being used in such a sensor arrangement.

公开(公告)号：US20220116396A1

公开(公告)日：2022-04-14

申请号：US17070732

申请日：2020-10-14

Applicant: ADVA Optical Networking SE

Inventor： Gopi Allu ,  Christopher Newman

IPC: H04L29/06 ,  G06F9/451

Abstract: user is authenticated via remote authentication to access a managed device, the restricted GUI Element information is pushed from the remote authentication server to the managed device where this information is used to grant or deny GUI access to the corresponding functional elements of the device. The process allows for granular control of each user's rights on different managed devices.

公开(公告)号：US20220109509A1

公开(公告)日：2022-04-07

申请号：US17063224

申请日：2020-10-05

Applicant: ADVA Optical Networking SE

Inventor： Sorin Tibuleac ,  Steven Searcy ,  Sergey Burtsev

IPC: H04B10/69 ,  H04B10/293 ,  H04B10/077 ,  H04B10/297 ,  H04B17/336

Abstract: The present invention relates to a method for optimizing performance of a multi-span optical fiber network. Each span has an associated optical transmission fiber connected to an associated optical amplifier. Gain and output power of the associated optical amplifier are respectively controlled independently. An amplifier noise figure respectively depends on the gain of the associated optical amplifier, with each associated optical amplifier further connected to launch optical signals into a remainder of a corresponding optical transmission line. The method includes the steps of for each span, computing the amplifier noise figure and a non-linear noise generated in the span based on information about the span and using the computed amplifier noise figure and the computed non-linear noise to compute an optimum launch power, and optimizing performance of the multi-span optical fiber network based on the computed optimum launch powers of all spans.

公开(公告)号：US11290190B2

公开(公告)日：2022-03-29

申请号：US15827928

申请日：2017-11-30

Applicant: ADVA Optical Networking SE

Inventor： Sorin Tibuleac ,  Steven Searcy

IPC: H01S3/00 ,  H04B10/294 ,  H03G3/30 ,  H04J14/02 ,  H01S3/10 ,  H04B10/69

Abstract: An apparatus for automatic amplifier gain setting of an optical amplifier, said apparatus comprising an optical channel counter, OCC, unit configured to detect a number of channels present in an optical transmission spectrum; a determination unit configured to determine an average power per channel calculated by dividing a measured total power of a signal input and/or signal output of the optical amplifier by the number of channels detected by said optical channel counter, OCC, unit and a gain adjustment unit configured to adjust the amplifier gain of said optical amplifier automatically depending on a calculated power difference between a predetermined desired power per channel and the determined average power per channel provided by said determination unit.

公开(公告)号：US20220029800A1

公开(公告)日：2022-01-27

申请号：US17380149

申请日：2021-07-20

Applicant: ADVA Optical Networking SE

Inventor： Andrew SERGEEV ,  Joo Yeon CHO

IPC: H04L9/08

Abstract: There is provided a technique of establishing encryption keys for communication between 1st peer and 2nd peer via a data path. The technique comprises: by each peer, using input keying material to independently generate equivalent pairs of peer encryption keys (PEKs), verifying equivalence of the generated PEK pairs, and using by 1st peer and 2nd peer the verified PEK pairs to become in possession of equivalent pairs of session encryption keys (SEKs). Verifying comprises: generating by 1st peer a first handshake (HS) message encrypted by PEK Tx1 and sending the first HS message to the 2nd peer via the data path; decrypting by the 2nd peer the first HS message using the PEK Rx2, generating a second HS message encrypted by PEK Tx2, and sending the second HS message to the 1st peer via the data path; and decrypting the second HS message by the 1st peer using PEK Rx1.

公开(公告)号：US11233564B1

公开(公告)日：2022-01-25

申请号：US17315408

申请日：2021-05-10

Applicant: ADVA Optical Networking SE

Inventor： Henning Hinderthür ,  Christian Scheerer ,  Christophe Meyer

IPC: H04J14/02 ,  H04B10/079 ,  H04L12/803 ,  H04L12/801 ,  H04B10/40

Abstract: The invention relates to a method for migrating data traffic from an existing optical WDM transmission system to a new optical WDM transmission system, the existing optical WDM transmission system using a first optical transmission band and the new optical WDM transmission system being capable of using a second optical transmission band. The second optical transmission band at least partially includes the first optical transmission band and a further extension band that does not overlap with the first optical transmission band, the method including the steps of. According to the invention, a migration filter device is used in order to connect, during a migration phase, the network nodes of the existing system and the network nodes of the new system to the network paths that have been used by the existing system. During the migration phase, both systems are operated in parallel, with the new system using the extension band only. In this way, during the migration phase, the data traffic handled by the existing system can stepwise be switched to the new system. After all data traffic has been switched to the new system, the existing system can be deinstalled. The migration filter devices can stepwise be deinstalled.

公开(公告)号：US20210409847A1

公开(公告)日：2021-12-30

申请号：US17355094

申请日：2021-06-22

Applicant: ADVA Optical Networking SE

Inventor： Henning Hinderthür ,  Cornelius Fuerst ,  Paul Morkel ,  Christophe Meyer ,  Christian Scheerer

IPC: H04Q11/00 ,  H04J14/02

Abstract: An apparatus for management of a spectral capacity of a wavelength division multiplexing, WDM, system includes at least one pair of transmission fibers provided for transporting optical signals. Each transmission fiber of a transmission fiber pair is connected to a first port of an optical circulator having at least two additional ports and adapted to transmit an incoming optical signal entering one of its ports via its next port. WDM subsystems configured with counter-propagating assignable wavelengths are connected to associated ports of the optical circulator of the apparatus.