Patent ID: 11910134
Assignee: GOOGLE LLC
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A system comprising:
an optical circuit switch (OCS) comprising:
a first fiber collimator and a second fiber collimator;
an OSC internal optical path coupling the first and second fiber collimators
an optical circulator having a bidirectional port optically coupled to a port of the second fiber collimator; and
a first transceiver optically coupled to the optical circulator; and

a link diagnostic system comprising:
a first photodetector and a second photodetector;
a light source;
an optical coupler, coupling the light source to the second photodetector; and

wherein:
the first photodetector is optically coupled to the optical circulator along a path comprising a fiber input to the first fiber collimator, the OSC internal optical path, and the port of the second fiber collimator.