Connection loss difference measurement method, equipment and program

A connection loss difference measuring method, comprising:

• individually inputting light pulses to a first core and a second core at one end of a non-coupled multicore fiber having a connection portion, and individually acquiring OTDR waveforms regarding the first core and the second core;
• obtaining, for each core, a loss of backscattered light intensity, at the connection portion, based on the OTDR waveforms;
• and
• calculating a ratio between the loss of the first core and the loss of the second core.

A connection loss difference measuring device, comprising:

• an optical time domain reflectometer that individually acquires OTDR waveforms regarding a first core and a second core at one end of a non-coupled multicore fiber having a connection portion;
• a processor;
• and
• a storage medium having computer program instructions stored thereon, when executed by the processor, perform to:
• calculate ratios between backscattering intensity regarding the first core and backscattering intensity regarding the second core, at at least two points including one point on one end side with respect to the connection portion and one point on another end side with respect to the connection portion, based on the OTDR waveforms, and calculate a ratio between the calculated ratio on the one end side and the calculated ratio on the another end side.

A connection loss difference measuring device, comprising:

• an optical time domain reflectometer that individually acquires OTDR waveforms regarding a first core and a second core at one end of a non-coupled multicore fiber having a connection portion;
• a processor;
• and
• a storage medium having computer program instructions stored thereon, when executed by the processor, perform to:
• obtain, for each core, a loss of backscattered light intensity, at the connection portion, based on the OTDR waveforms, and calculate a ratio between the loss of the first core and the loss of the second core.