Infinera Corporation

Robert Maher

Han Henry Sun

Pierre Mertz

Sharfuddin Syed

Abhinava Shivakumar Sadasivarao

Loukas Paraschis

A transceiver is herein described. The transceiver comprises an optical source providing an optical signal, a modulator receiving the optical signal and configured to encode data into the optical signal, a transmitter module to receive data to be encoded into the optical signal and having at least one drive circuit supplying driver signals to the modulator to cause the modulator to encode data into a carrier having a frequency band and a tone signal outside of the frequency band into the optical signal, a narrowband filter operable to receive a portion of the optical signal via an optical loopback, the optical signal having the encoded data and a first tone reflection of the tone signal at a first instant of time and to pass the first tone reflection, a polarimeter operable to receive the first tone reflection and determine a first tone polarization of the first tone reflection.

State of polarization sensitive coherent optical time domain reflectometry

Methods for, and network elements in, packet or optical transport networks are disclosed, including a network element comprising non-transitory computer readable medium storing computer-executable instructions configured as one or more software agents that when executed with computer hardware: determine a state of the network element, comprising comparing a current state of transient properties of the network element against a predetermined, expected state of the transient properties of the network element; and verify a state of other network elements or paths in the transport network by comparing a current state of one or more network-level constraints of the other network elements or paths against a predetermined, expected state of the one or more network-level constraints on the other network elements or paths. The computer hardware may further positively or negatively acknowledge received instructions to apply a configuration to the network element based on the determination and/or verification.

Growing community of inventors

Campbell, CA, United States of America

Robert Maher