Title:
PHASE DERIVATION-BASED OPTICAL COMPONENT DELAY MEASUREMENT METHOD, AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/082377
Kind Code:
A1
Abstract:
A phase derivation-based optical component delay measurement method comprises: determining, according to a measurement requirement, a frequency sweep range in advance, and selecting multiple frequency sweep points therefrom; modulating, at each of the frequency sweep points, an optical carrier wave by using a microwave modulation of a frequency of the frequency sweep point, and measuring, by using a phase detector, a phase change of the microwave modulation signal after the modulation signal propagates through an optical component under test; performing phase unwrapping on a series of phase changes obtained from measurements, and calculating, by using an unwrapped phase of each of the frequency sweep points obtained from the phase unwrapping, whole-cycle ambiguity of a maximum frequency sweep point, and calculating a delay of the optical component under test according to the whole-cycle ambiguity of the maximum frequency sweep point. Further disclosed is a phase derivation-based optical component delay measurement device. The method and device significantly reduce the number of frequency sweep points, thereby improving measurement efficiency, and mitigating the influence of environment errors on measurements.
Inventors:
PAN SHILONG (CN)
LI SHUPENG (CN)
QING TING (CN)
FU JIANBIN (CN)
PAN WANSHENG (CN)
LI SHUPENG (CN)
QING TING (CN)
FU JIANBIN (CN)
PAN WANSHENG (CN)
Application Number:
PCT/CN2020/087447
Publication Date:
May 06, 2021
Filing Date:
April 28, 2020
Export Citation:
Assignee:
NANGJING UNIV OF AERONAUTICS AND ASTRONAUTICS (CN)
SUZHOU LIUYAOSI INFORMATION TECH CO LTD (CN)
SUZHOU LIUYAOSI INFORMATION TECH CO LTD (CN)
International Classes:
G01M11/02
Foreign References:
| CN110715796A | 2020-01-21 | |||
| CN110207822A | 2019-09-06 | |||
| CN109495169A | 2019-03-19 | |||
| CN208971520U | 2019-06-11 | |||
| JP2019105530A | 2019-06-27 |
Other References:
SHUPENG LI ET AL.: "Optical Fiber Transfer Delay Measurement Based on Phase-Derived Ranging", IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 31, no. 16, 15 August 2019 (2019-08-15), XP011737589, DOI: 10.1109/LPT.2019.2926508
Attorney, Agent or Firm:
JW IP LAW FIRM (CN)
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