High-frequency fiber optic phase modulator using piezoelectric polymer coating

1991 ◽  
Author(s):  
Masaaki M. Imai ◽  
T. Yano ◽  
Yoshihiro Ohtsuka
Keyword(s):  
High Frequency ◽  
Polymer Coating ◽  
Fiber Optic ◽  
Phase Modulator ◽  
Piezoelectric Polymer

Wide-frequency fiber-optic phase modulator using piezoelectric polymer coating

1990 ◽  
Vol 2 (10) ◽  
pp. 727-729 ◽  
Author(s):  
M. Imai ◽  
T. Yano ◽  
Y. Ohtsuka ◽  
K. Motoi ◽  
A. Odajima
Keyword(s):  
Polymer Coating ◽  
Fiber Optic ◽  
Phase Modulator ◽  
Piezoelectric Polymer

Using High-Frequency Noiselike Modulation for Reducing Drift Processes in a LiNbO3-Phase Modulator of a Fiber-Optic Gyroscope

2020 ◽  
Vol 46 (10) ◽  
pp. 950-953
Author(s):  
E. V. Vostrikov ◽  
D. A. Pogorelaya ◽  
A. N. Nikitenko ◽  
A. S. Aleinik
Keyword(s):  
High Frequency ◽  
Fiber Optic ◽  
Phase Modulator ◽  
Fiber Optic Gyroscope

High-frequency fiber-optic phase modulator

1987 ◽  
Author(s):  
N. LAGAKOS ◽  
G. KU ◽  
J. H. COLE ◽  
J. A. BUCARO
Keyword(s):  
High Frequency ◽  
Fiber Optic ◽  
Phase Modulator

scholarly journals Использование высокочастотной шумоподобной модуляции для снижения дрейфовых процессов в LiNbO-=SUB=-3-=/SUB=--фазовом модуляторе волоконно-оптического гироскопа

2020 ◽  
Vol 46 (19) ◽  
pp. 11
Author(s):  
Е.В. Востриков ◽  
Д.А. Погорелая ◽  
А.Н. Никитенко ◽  
А.С. Алейник
Keyword(s):  
High Frequency ◽  
Fiber Optic ◽  
Noise Signal ◽  
Frequency Noise ◽  
Phase Modulator ◽  
Fiber Optic Gyroscope ◽  
Frequency Range ◽  
Very High Frequency ◽  
High Frequency Noise ◽  
Very High

In this paper, the phase modulator optical phase drift reduction method is proposed and researched for LiNbO3 multi-functional integrated optical chip as a part of a fiber-optic gyroscope. This approach consists of applying a very high-frequency noise signal to a phase modulator in the range from 20 MHz to 100 MHz, which is outside of a fiber-optic gyroscope operating frequency range. The presented method showed that the increase in very high-frequency noise signal voltage up to around 1.7 half-wave voltages of the phase modulator allows decreasing optical phase drift by more than 4 times in the frequency range below 64.5 kHz.

High Frequency Ultrasonic Measurements

1988 ◽  
Vol 21 (5) ◽  
pp. 133-136
Author(s):  
N Zarsav
Keyword(s):  
High Frequency ◽  
Polymer Coating ◽  
Steel Sheet ◽  
Lamb Waves ◽  
Thin Plates ◽  
Design Features ◽  
Degree Of Cure ◽  
Double Probe ◽  
Ultrasonic Measurements

The use of high frequency ultrasonic Lamb waves to measure the thickness of thin plates and foils, is discussed and the feasibility of their application to the determination of the degree of cure of polymer coating on coated tin plated steel sheet (as used by the food can industry) is evaluated. The paper also discusses briefly the design features of the purpose built precision double probe ultrasonic goniometer used to carry out these measurements.

scholarly journals A High-Frequency Sound based PGC Demodulation Scheme for Fiber Optics Hydrophone

2021 ◽  
Author(s):  
Yunjie Shi ◽  
Mengke Yin ◽  
Zijue Zhu ◽  
Shun Wang ◽  
Panting Niu ◽  
...  
Keyword(s):  
Fiber Optics ◽  
Sound Source ◽  
Acoustic Signal ◽  
High Frequency ◽  
Fiber Optic ◽  
Low Cost ◽  
Research Field ◽  
Interference Signal ◽  
High Frequency Sound ◽  
Frequency Sound

Abstract In the research field of fiber-optic hydrophone, the performance of demodulation scheme is crucial. In this work, a phase-generated-carrier (PGC) demodulation scheme based on high-frequency sound source is proposed. Highfrequency acoustic signal from the external sound source is applied to the fiber-optic hydrophone to achieve phase modulation of the interference signal instead of the piezo-electrical transducer (PZT) or frequency-modulated laser. It possesses the merits of low system complexity and low cost. Through the acoustic detection experiment, we achieve demodulation of acoustic signal at frequency varying from 300 Hz to 800 Hz, and the signal-to-noise ratio (SNR) is higher than 45 dB. Furthermore, the proposed scheme is successfully applied to time division multiplexing (TDM) experiment.

Distributed single fiber optic vibration sensing with high frequency response and multi-points accurate location

2020 ◽  
Vol 129 ◽  
pp. 106060 ◽  
Author(s):  
Pengfei Ma ◽  
Kun Liu ◽  
Zhenshi Sun ◽  
Junfeng Jiang ◽  
Shuang Wang ◽  
...  
Keyword(s):  
Frequency Response ◽  
High Frequency ◽  
Fiber Optic ◽  
Single Fiber ◽  
High Frequency Response ◽  
Vibration Sensing
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