US 12,680,908 B2Granted

Optical pulse test device and optical pulse test method

AssigneeAnritsu Corporation

InventorsRyota Takasu, Taichi Murakami, Kodai Ishida

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Abstract

According to the present disclosure, an optical pulse test device includes an OTDR waveform measurement unit that measures an OTDR waveform with a plurality of pulse widths, an event analysis unit that calculates a level, a loss, and a return loss at a start point of each event, and an analysis result integration unit that calculates a cumulative loss at the start point and an end point of each event from the level, the loss, and the return loss at the start point of each event, determines a pulse width that enables securing of a required SN ratio or more for each of the start point and the end point of each event, integrates the cumulative loss at each of the start point and the end point of each event with the determined pulse width, and sets the integrated cumulative loss as an analysis result.

Claims8

Dependent claims

An optical pulse test device comprising:

an OTDR waveform measurement unit configured to measure an OTDR waveform in an object under test with a plurality of pulse widths;
an event analysis unit configured to calculate, from the OTDR waveform measured by the OTDR waveform measurement unit, a level, a loss, and a return loss at a start point of each event occurring in the object under test;
and
an analysis result integration unit configured to calculate a cumulative loss at the start point and an end point of each event from the level, the loss, and the return loss at the start point of each event, which are calculated by the event analysis unit, for each of the plurality of pulse widths, determine, for each event, a pulse width that enables securing of a required SN ratio or more for each of the start point and the end point of each event, integrate the cumulative loss at each of the start point and the end point of each event with the determined pulse width, and set the integrated cumulative loss as an analysis result.

1 more element

An optical pulse test method comprising:

an OTDR waveform measurement step of measuring an OTDR waveform in an object under test with a plurality of pulse widths;
an event analysis step of calculating, from the OTDR waveform measured in the OTDR waveform measurement step, a level, a loss, and a return loss at a start point of each event occurring in the object under test;
and
an analysis result integration step of calculating a cumulative loss at the start point and an end point of each event from the level, the loss, and the return loss at the start point of each event, which are calculated in the event analysis step, for each of the plurality of pulse widths, determining, for each event, a pulse width that enables securing of a required SN ratio or more for each of the start point and the end point of each event, integrating the cumulative loss at each of the start point and the end point of each event with the determined pulse width, and setting the integrated cumulative loss as an analysis result.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 18/330,044Filed 6 Jun 2023
Priority: JP 2022-09610214 Jun 2022
Published: US 2023/0400383 A114 Dec 2023
Granted: 14 Jul 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

G01M 11/3145
Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR: details of the optoelectronics or data analysis
G01M 11/3118
Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR: using coded light-pulse sequences
G01M
Testing static or dynamic balance of machines or structures