Amazon Technologies, Inc.

Matthew Connolly

Alaa Adel Mahdi Hayder

Emily Abbess

Salman Khaleghi

Kevin Giblin

Sean Smyth

Edgard Alberto Delgado

Optical fiber communication systems include monitor filters that permit OTDR or other monitoring signals to co-propagate or counter-propagate on link fibers. OTDR measurements are periodically triggered, and acquired OTDR signatures are compared with store signatures to locate faults. The monitor filter can be used in single direction, dual OTDR bidirectional, or signal OTDR bidirectional (loopback) monitoring.

Bidirectional optical fiber auto-notifier test system

Optical communication systems include optical time domain reflectometers that are coupled to link fibers to determine link fiber lengths. After length measurement, chromatic dispersion associated with the measured length is estimated. In some examples, the estimated chromatic dispersion is compensated. A single OTDR can be used to assess a pair of link fibers coupling first and second network nodes by injecting a probe pulse at a common end of the link fibers or by routing the probe pulses from a remote end of one link fiber into a remote end of a second fiber.

Latency based chromatic dispersion estimation methods

Growing community of inventors

Dublin, Ireland

Matthew Connolly