Deformation Method of Self-Mixing Laser Sensor’s Feedback Phase for Estimation of Optical Feedback Coupling Factor and Displacement

Khan, Junaid Iqbal; Zabit, Usman

doi:10.1109/jsen.2020.3046266

Cited by 7 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Parameters C and

can be estimated from SMI vibrometric signals in air at rest [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. Among the different methods, some are only effective in weak feedback [ 23 , 24 , 25 ] and others only in moderate feedback [ 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…For instance, if the distance between the LD and the retro-reflective surface is about 20 cm, an acoustic wave at 112 dB SPL induces an optical path variation of 1.2 nanometers [ 13 ], which is three orders of magnitude below mechanical vibrations of a few micrometers [ 3 ]. For the measurement of C and

in strong feedback regime, the methods can be divided into two categories: phase unwrapping methods [ 29 , 30 , 31 , 33 ] and direct SMI signal analysis methods [ 32 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Self-Mixing Interferometer for Acoustic Measurements through Vibrometric Calibration

Chanu-Rigaldies,

Lecomte,

Ollivier

et al. 2024

Sensors

View full text Add to dashboard Cite

The Self-Mixing Interformeter (SMI) is a self-aligned optical interferometer which has been used for acoustic wave sensing in air through the acousto-optic effect. This paper presents how to use a SMI for the measurement of Sound Pressure Level (SPL) in acoustic waveguides. To achieve this, the SMI is first calibrated in situ as a vibrometer. The optical feedback parameters C and α in the strong feedback regime (C≥4.6) are estimated from the SMI vibrometric signals and by the solving of non-linear equations governing the SMI behaviour. The calibration method is validated on synthetic SMI signals simulated from SMI governing equations for C ranging from 5 to 20 and α ranging from 4 to 10. Knowing C and α, the SMI is then used as an acoustic pressure sensor. The SPLs obtained using the SMI are compared with a reference microphone, and a maximal deviation of 2.2 dB is obtained for plane waves of amplitudes ranging from 20 to 860 Pa and frequencies from 614 to 17,900 Hz. The SPL measurements are carried out for C values ranging from 7.1 to 21.5.

show abstract

“…Parameters C and

Section: Introductionmentioning

confidence: 99%

in strong feedback regime, the methods can be divided into two categories: phase unwrapping methods [ 29 , 30 , 31 , 33 ] and direct SMI signal analysis methods [ 32 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%