Fiber shape measurement method and apparatus

An apparatus for an optical fiber shape measurement, the apparatus comprising:

• a processor and an interface circuit, wherein the processor is connected to the interface circuit, and the processor is configured to:
• determine, based on a correlation between measured acoustic vibration signals at segments in each pair of fiber segments in a plurality of fiber segments of an optical fiber, a spatial distance between each pair of fiber segments;
• determine a fiber distance between each pair of fiber segments of the plurality of fiber segments, wherein the fiber distance represents a path length along the optical fiber;
• and
• determine a shape of the optical fiber based on spatial distances and fiber distances of pairs of fiber segments in the plurality of fiber segments.

A computer-readable storage medium having instructions stored thereon which, when executed by one or more processors, cause the one or more processors to perform operations including:

• determining, based on a correlation between measured acoustic vibration signals at segments in each pair of fiber segments in a plurality of fiber segments of an optical fiber, a spatial distance between each pair of fiber segments;
• determining a fiber distance between each pair of fiber segments of the plurality of fiber segments, wherein the fiber distance represents a path length along the optical fiber;
• and
• determining a shape of the optical fiber based on spatial distances and fiber distances of pairs of fiber segments in the plurality of fiber segments.