Laser polarization imaging method based on frequency-shifted optical feedback

Deng, Shiwei; Liu, Weixin; Shen, Hua

doi:10.1016/j.optlastec.2022.109099

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…Self-mixing interference occurs when a portion of light emitted from a laser source is reflected or scattered back into the laser cavity by a remote target, the reflected light mixes with the light inside the cavity, causing a modulation of both the amplitude and the frequency of the lasing field. Using a simple opto-electronic system, SMI-based sensors have been developed for various applications of displacement, 5 – 7 distance, 8 – 10 flow, 11 – 15 imaging, 16 , 17 etc. Recently, the rapid development of semiconductors, advanced manufacturing has given rise to a growing demand for multiplexed displacement sensors.…”

Section: Introductionmentioning

confidence: 99%

Laser self-mixing interferometry for dynamic displacement sensing of multiple targets

Zhang,

Li,

Xie

et al. 2024

Opt. Eng.

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A multichannel laser self-mixing interferometry (SMI) is proposed based on a combination of linear injection current modulation and carrier frequency division multiplexing (FDM) technique. The laser output is split into several beams with each beam directed toward a specific target for measurement. The reflected beams then return to the laser cavity, where self-mixing interference takes place. Since the external cavity length of each measurement channel is different, the SMI signal contains multiple carriers due to the injection current modulation. An algorithm based on FDM is developed for displacement sensing of multiple targets from a single SMI signal. Experimental results show that the relative error of multichannel displacement measurement is <1.4%. This work demonstrates an attractive multichannel SMI for displacement sensing featuring compact configuration and high resolution.

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Section: Introductionmentioning

confidence: 99%

Laser self-mixing interferometry for dynamic displacement sensing of multiple targets

Zhang,

Li,

Xie

et al. 2024

Opt. Eng.

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“…Compared with array sensors, the benefits of a single-pixel detector are its quick reaction time, excellent sensitivity, and wide operating band [2]. Therefore, single-pixel imaging has attracted wide attention and has been used in terahertz imaging [4,5], 3D imaging [6,7], multispectral imaging [8,9], image encryption [10], target tracking [11][12][13], polarization imaging [14,15], underwater imaging [16,17], remote sensing [18,19], and other fields.…”

Section: Introductionmentioning

confidence: 99%

Fourier Single-Pixel Imaging Based on Online Modulation Pattern Binarization

Jiang,

Tong,

et al. 2023

Photonics

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Down-sampling Fourier single-pixel imaging is typically achieved by truncating the Fourier spectrum, where exclusively the low-frequency Fourier coefficients are extracted while discarding the high-frequency components. However, the truncation of the Fourier spectrum can lead to an undesired ringing effect in the reconstructed result. Moreover, the original Fourier single-pixel imaging necessitated grayscale Fourier basis patterns for illumination. This requirement limits imaging speed because digital micromirror devices (DMDs) generate grayscale patterns at a lower refresh rate. In order to solve the above problem, a fast and high-quality Fourier single-pixel imaging reconstruction method is proposed in the paper. In the method, the threshold binarization of the Fourier base pattern is performed online to improve the DMD refresh rate, and the reconstruction quality of Fourier single-pixel imaging at a low-sampling rate is improved by generating an adversarial network. This method enables fast reconstruction of target images with higher quality despite low-sampling rates. Compared with conventional Fourier single-pixel imaging, numerical simulation and experimentation demonstrate the effectiveness of the proposed method. Notably, this method is particularly significant for fast Fourier single-pixel imaging applications.

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Inhomogeneous thermal analysis of microlayer mold for glass molding of fast-axis collimation lens array

Wang,

Zhou,

et al. 2024

Optics and Lasers in Engineering

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Laser polarization imaging method based on frequency-shifted optical feedback

Cited by 5 publications

References 26 publications

Laser self-mixing interferometry for dynamic displacement sensing of multiple targets

Laser self-mixing interferometry for dynamic displacement sensing of multiple targets

Fourier Single-Pixel Imaging Based on Online Modulation Pattern Binarization

Inhomogeneous thermal analysis of microlayer mold for glass molding of fast-axis collimation lens array

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