Patent ID: 11885707
Assignee: II-VI DELAWARE, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 14:
15. A method of forming an end-to-end OTDR trace of an optical fiber span, the method including the steps of:
performing a first OTDR procedure from a first, near-end termination of the optical fiber span, using a near-end OTDR module to transmit a near-end optical probe operating at a known wavelength and measure back-reflected optical power associated with the near-end optical probe, generating therefrom a near-end OTDR trace;
performing a second OTDR procedure from a second, far-end termination of the optical fiber span, using a far-end OTDR module to transmit a far-end optical probe operating at the known wavelength and measure back-reflected optical power associated with the far-end optical probe, generating therefrom a far-end OTDR trace;
estimating a span-based parameter of the optical fiber span;
defining an OTDR trace stitching point as a mid-point of the estimated span-based parameter;
starting at the stitching point of the far-end OTDR trace, identify loss values for a set of individual span locations from the stitching point to the far-end termination of the optical fiber span;
adding an inverse of each identified loss value to the near-end OTDR trace to form a combined OTDR trace of the optical fiber span; and
inserting anomalies present in the far-end OTDR trace at defined locations into the combined OTDR trace, forming as an output the end-to-end OTDR trace of the optical fiber span.