Eliminating Light Intensity Disturbance With Reference Compensation in Interferometers

Zhang, S.; Zhang, A.; Pan, Honggang

doi:10.1109/lpt.2015.2444421

Cited by 36 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The key factors affecting the PGC demodulation effect include the laser intensity disturbance (LID) effect, 50,51 phase modulation depth, 46,48,49 and phase delay 52–56 . Due to the limitation of wavelength modulation range, PGC demodulation is suitable for demodulating F‐P sensors with long cavity length.…”

Section: Fast Interrogation Techniquesmentioning

confidence: 99%

Fast interrogation of dynamic low‐finesse Fabry‐Perot interferometers: A review

Liu

Peng

2021

Micro & Optical Tech Letters

View full text Add to dashboard Cite

Low‐finesse fiber‐optic Fabry–Perot (F‐P) interferometric sensor has the advantages of high sensitivity, anti‐electromagnetic interference, and compact size, and is one of the most widely used optical fiber sensors. With the development of sensor design and demodulation algorithms, F‐P sensing technique plays an increasingly important role in high‐speed dynamic measurement, such as dynamic temperature or pressure, acoustic vibration, dynamic displacement, and distance. Signal demodulation methods largely determine the performance of the entire sensing system. Compared with quasi‐static measurement, high‐precision measurement of dynamic F‐P cavity is more challenging. The advancement of fast tunable laser technology in telecommunication field provides novel perspectives for demodulation methods and dynamic applications based on F‐P sensors. This article reviews the latest developments in fast interrogation techniques for dynamic low‐finesse F‐P sensors, including intensity demodulation, quadrature phase demodulation and absolute cavity length demodulation. In addition, array multiplexing and multi‐parameter measurement techniques are also involved.

show abstract

Section: Fast Interrogation Techniquesmentioning

confidence: 99%

Fast interrogation of dynamic low‐finesse Fabry‐Perot interferometers: A review

Liu

Peng

2021

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…To address these problems, more and more PGC demodulation algorithms have been developed by scholars. For example, a PGC-RCM algorithm based on DCM phase demodulation that can eliminate the effect of light intensity disturbance was proposed by Zhang et al [20], and to eliminate the effect of phase modulation depth on phase demodulation, they proposed another algorithm called PGC-AD-RCM [21]. He et al [22] proposed a PGC-DSM-DCM algorithm with low harmonic distortion and high stability.…”

Section: Introductionmentioning

confidence: 99%

Detection of Water Surface Acoustic Waves Using Sinusoidal Phase Modulation Interferometer and Prenormalized PGC-Arctan Algorithm

Zhang,

Fang,

Yang

et al. 2024

Photonics

View full text Add to dashboard Cite

A sinusoidal phase modulation laser interferometer is proposed to detect water surface acoustic waves excited by underwater acoustic radiation, and an improved PGC-Arctan demodulation algorithm that combines prenormalization and Lissajous ellipse fitting is proposed to demodulate detection signals. In this paper, the effects of phase modulation depth, carrier phase delay, and interference signal visibility on the Lissajous figure formed by quadrature interference components are analyzed. The demodulation algorithm first uses the amplitudes of multiple Fourier spectral components of an interference signal to calculate the phase modulation depth C, and calculation of the carrier phase delay Vc is achieved through the introduction of a quadrature carrier signal. Then, certain coefficients regarding C and Vc are constructed for prenormalization of the two quadrature interference signal components to eliminate the local nonuniform widening phenomenon of Lissajous ellipse. Next, the outer and the inner contours are extracted from a uniformly widened Lissajous ellipse resulting from light intensity disturbance, and the axial ratio of the ellipse is obtained, which is used to correct the ratio of the quadrature interference signal to eliminate the effect of filter gain coefficients. At last, through the combination of an Arctan algorithm and a phase-unwrapping algorithm, high-precision demodulation of the interference signal is realized. A sinusoidal phase modulation interferometer was set up to detect water surface acoustic waves, and a series of detection experiments were carried out. The experiment results show that the detection method and demodulation algorithm described in this paper can accurately realize the measurement of weak water surface acoustic waves. The proposed algorithm shows less distortion in demodulation results, and its signal-to-noise distortion ratio is less than 20 dB at 500 Hz, which is significantly better than traditional algorithms. The experimental results demonstrate the effectiveness and accuracy of water surface acoustic wave detection using sinusoidal phase modulation interferometer.

show abstract

“…Direct interference intensity demodulation method has fast interrogation speed for acoustic sensing, however, its performance limited severely by unstable operating point of the EFPI sensor in the linear operating region [18], [19]. The differential cross multiplication (DCM) phase demodulation [20] method does not have the above limitation and provide a way for large-dynamic-range and wide bandwidth acoustic signal. Many configurations based on dual-wavelength or three-wavelength were proposed to realize the DCM phase demodulation.…”

Section: Introductionmentioning

confidence: 99%

Environment-Robust Polarization-Based Phase-Shift Dynamic Demodulation Method for Optical Fiber Acoustic Sensor

et al. 2022

View full text Add to dashboard Cite

In this paper, an environment-robust polarizationbased phase-shift dynamic demodulation method for optical fiber acoustic sensor is proposed. Through optical lever effect of polarization low-coherence interference and amplitude scaling differential cross multiplication (AS-DCM) algorithm, acoustic-source induced interference phase of the acoustic sensor can be demodulated in real-time with high precision. The maximum relative phase demodulation error was only 0.694% when the cavity length had an offset ∼4 µm. The maximum cavity length demodulation error was keeping less than 3.988 nm under the optical power reduced ten times, which demonstrated an ultra-stable demodulation for the largest permitted optical power attenuation range, to our best knowledge. The proposed method has a capability of tolerating large optical power attenuation and large cavity length random offset, providing an environment-robust way for optical fiber acoustic sensor working in extreme environments.

show abstract

Eliminating Light Intensity Disturbance With Reference Compensation in Interferometers

Cited by 36 publications

References 12 publications

Fast interrogation of dynamic low‐finesse Fabry‐Perot interferometers: A review

Fast interrogation of dynamic low‐finesse Fabry‐Perot interferometers: A review

Detection of Water Surface Acoustic Waves Using Sinusoidal Phase Modulation Interferometer and Prenormalized PGC-Arctan Algorithm

Environment-Robust Polarization-Based Phase-Shift Dynamic Demodulation Method for Optical Fiber Acoustic Sensor

Contact Info

Product

Resources

About