公开(公告)号：US10715410B2

公开(公告)日：2020-07-14

申请号：US16039030

申请日：2018-07-18

Applicant: Google LLC

Inventor： Rene Schmogrow ,  Matthew Newland

IPC: H04L12/26 ,  H04J14/02 ,  H04L5/00 ,  H04L12/751

Abstract: Systems and methods for performing connectivity verification testing and topology discovery in a reconfigurable optical add/drop multiplexer (ROADM) are provided. The ROADM can include a ROADM block having a plurality of internal ports connected to a fiber shuffle via respective optical fibers. The ROADM block includes a test signal transmitter configured to inject an outgoing test signal having a unique signature into each internal port. The outgoing test signals are out-of-band of optical data signals traversing the ROADM. The ROADM block includes a test signal monitor configured to monitor for incoming test signals at each of the internal ports. The test signal monitor is configured to validate, based on a signature of an incoming test signal received at an internal port of the ROADM block, whether a valid connection exists between the internal port and an internal port of a second ROADM block.

公开(公告)号：US20200028765A1

公开(公告)日：2020-01-23

申请号：US16039030

申请日：2018-07-18

Applicant: Google LLC

Inventor： Rene Schmogrow ,  Matthew Newland

IPC: H04L12/26 ,  H04L12/751 ,  H04J14/02 ,  H04L5/00

Abstract: Systems and methods for performing connectivity verification testing and topology discovery in a reconfigurable optical add/drop multiplexer (ROADM) are provided. The ROADM can include a ROADM block having a plurality of internal ports connected to a fiber shuffle via respective optical fibers. The ROADM block includes a test signal transmitter configured to inject an outgoing test signal having a unique signature into each internal port. The outgoing test signals are out-of-band of optical data signals traversing the ROADM. The ROADM block includes a test signal monitor configured to monitor for incoming test signals at each of the internal ports. The test signal monitor is configured to validate, based on a signature of an incoming test signal received at an internal port of the ROADM block, whether a valid connection exists between the internal port and an internal port of a second ROADM block.

公开(公告)号：US10574379B2

公开(公告)日：2020-02-25

申请号：US16219241

申请日：2018-12-13

Applicant: Google LLC

Inventor： Vinayak Dangui ,  Vijayanand Vusirikala ,  Matthew Newland

IPC: H04B10/00 ,  H04J14/02 ,  H04B10/294 ,  H04B10/291 ,  H04Q11/00 ,  H04B10/564 ,  H04J14/00

Abstract: A reconfigurable optical add/drop multiplexer (ROADM) includes a plurality of interconnected ROADM blocks. Each ROADM block includes an ingress switchable-gain amplifier, an output power detector coupled to an output of the ingress switchable gain amplifier, and a wavelength-selective switch coupled to the output of the ingress switchable gain amplifier. Each ROADM block includes a plurality of add/drop blocks coupled to the wavelength-selective switches of the plurality of ROADM blocks. The ROADM includes a controller configured to receive an indication of an output signal power from the output power detector and adjust gain and equalization parameters of the ingress switchable-gain amplifier based on the received indication of the output signal power.

公开(公告)号：US20190215090A1

公开(公告)日：2019-07-11

申请号：US16219241

申请日：2018-12-13

Applicant: Google LLC

Inventor： Vinayak Dangui ,  Vijayanand Vusirikala ,  Matthew Newland

IPC: H04J14/02 ,  H04B10/564

Abstract: A reconfigurable optical add/drop multiplexer (ROADM) includes a plurality of interconnected ROADM blocks. Each ROADM block includes an ingress switchable-gain amplifier, an output power detector coupled to an output of the ingress switchable gain amplifier, and a wavelength-selective switch coupled to the output of the ingress switchable gain amplifier. Each ROADM block includes a plurality of add/drop blocks coupled to the wavelength-selective switches of the plurality of ROADM blocks. The ROADM includes a controller configured to receive an indication of an output signal power from the output power detector and adjust gain and equalization parameters of the ingress switchable-gain amplifier based on the received indication of the output signal power.