scholarly journals Effect of Modulation Error on All Optical Fiber Current Transformers

2012 ◽  
Vol 02 (04) ◽  
pp. 172-176 ◽  
Author(s):  
Zhengping Wang ◽  
Yuekun Wang ◽  
Shuai Sun
Keyword(s):  
Optical Fiber ◽  
Current Transformers ◽  
All Optical

Error Calculating and Compensating Method of All-Optical Fiber Current Transformer in ± 10 kV DC Distribution Network

2019 ◽  
Vol 14 (11) ◽  
pp. 1606-1615
Author(s):  
Jicheng Yu ◽  
Changxi Yue ◽  
Jun Li ◽  
Dengyun Li ◽  
He Li
Keyword(s):  
Optical Fiber ◽  
Distribution Network ◽  
Current Transformer ◽  
Electromagnetic Current ◽  
Current Transformers ◽  
Wave Plate ◽  
Remote Transmission ◽  
Dc Distribution ◽  
All Optical ◽  
Database Technology

Current transformer is one of the main equipment in ±10 kV DC distribution network. Traditional electromagnetic current transformer has poor anti-jamming capacity and poor insulation, so it cannot realize transient protection. The emergence of all-optical fiber current transformer brings solutions to these problems, which has attracted more and more attention. In this study, aiming at the problem of error and compensation of λ/4 waveform of all-fiber current transformer, the fabrication method of λ/4 waveform is studied, the mathematical model of the waveform is established, the influence of the waveform error on the scale factor is analyzed, and a calculating device of angle difference and ratio difference to compare the error is designed. The device adopts the principle of traceability of quantities to collect the state data of the wave plate. At the same time, in order to collect data for errors, database technology and network technology are used to realize remote transmission of monitoring data. The error of the λ/4 wave plate is compensated, the bidirectional principle generated by the birefringence in the fiber ring is analyzed, and the data logic description of the transformer sensitive ring is performed. The phase delay and the angle of the shaft are selected as the main factors causing the error. Compensation is performed by means of peak segmentation and variable cancellation. In the experimental process, compared with the error sampling of the traditional transformer, the error calculated by the current amplitude and phase angle parameters obtained by the all-fiber current transformer is more accurate, and the compensation scheme can suppress the size of the birefringence and improve sensing accuracy of fiber optic current transformers. This study provides a powerful reference for the error analysis of all-fiber current transformer λ/4 wave plates, which is beneficial to promote the better application of such current transformers.

Optical Vibration and Acceleration Sensor With a Silicon Cantilever

1999 ◽  
Author(s):  
Mitsuteru Kimura ◽  
Katsuhisa Toshima ◽  
Harunobu Satoh
Keyword(s):  
Simple Model ◽  
Optical Fiber ◽  
Resonance Frequency ◽  
Acceleration Sensor ◽  
Frequency Range ◽  
Silicon Cantilever ◽  
All Optical ◽  
New Type ◽  
Good Agreement ◽  
Optical Vibration

Abstract A new type all optical vibration and acceleration sensor using the combination of micromachined Si cantilever and optical fiber is proposed, and its fundamental characteristics are demonstrated. The light emitted from bulb-lens set into the V-groove is reflected at the reflector formed on the Si cantilever and then recoupled into the bulb-lens. Several sensors with different length (0.64–6.0 mm long) of the Si cantilever are fabricated to compare the theoretical resonance frequency fr obtained from the simple model and experimental ones. They had good agreement. From the sensing principle the sensing frequency range of the vibration is suitable below the fr of the Si cantilever of the sensor.

All optical fiber mode selective coupler based on non-weak guided fiber

2021 ◽  
Author(s):  
Lianzhen Zhang ◽  
Xuejing Liu ◽  
qianbo wang ◽  
na yang ◽  
jun zhou ◽  
...  
Keyword(s):  
Optical Fiber ◽  
All Optical ◽  
Fiber Mode

All-optically-driven and All-optical-fiber Vacuum Gauge via Ytterbium-doped Optical Fiber Microheater

2021 ◽  
Author(s):  
Nanjie Yu ◽  
Andrey E. Mironov ◽  
Sehyun Park ◽  
Matthew Tuggle ◽  
Jane Gragg ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Vacuum Gauge ◽  
All Optical

scholarly journals All-optical fiber optic coherent amplifier

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
A. Goodarzi ◽  
M. Ghanaatshoar ◽  
M. Mozafari
Keyword(s):  
Optical Fiber ◽  
Fiber Optic ◽  
All Optical
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