Efficient Processing of Spectral Measurements Using Virtually Imaged Phased Array

Xie, Chengfeng; Cai, Changjun; Wang, Ping; Zhang, Yubao; Shi, Jiulin; He, Xingdao

doi:10.1109/lpt.2021.3049121

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…The VIPA is a plate glass with a surface roughness of less than 0.01, and a 100% and 95% reflectivity coating, respectively [10][11][12]. A schematic diagram is shown in figure 1.…”

Section: Vipa Spectrometermentioning

confidence: 99%

An axial length measurement system based on the VIPA spectrometer

Li¹,

Yang²,

Zhou³

et al. 2023

Laser Phys.

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In the ophthalmology field, the length of the eye axis is an effective way to determine whether the eye is healthy or not. Thus, the accurate measurement of the axial length becomes very important. In this paper, a measurement system for axial length based on a virtual image phase array spectrometer is planned. This system has many advantages, such as short acquisition time, wide spectrum measurement variability, high spectral resolution, etc. With the advantages of it being non-invasive and the fact that it can be used in real time, the optical coherence tomography system can be used to enhance the speed of the interference image spectrum of the cornea and retina. By verifying the effectiveness of the system, eye samples with an axis length of 18–32 mm are measured accurately with a measurement error of ±0.07 mm and a minimum measurement length of around 0.55 mm. The optical power of the incident light entering the sample at a wavelength of 810 nm is measured by an optical power meter to be less than 710 μm, and the power of the reflected light from the sample is 95nW. Based on the data above, the measurement system in this paper is identified as a biometric instrument that complies with internationally accepted safety standards.

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“…The VIPA is a plate glass with a surface roughness of less than 0.01, and a 100% and 95% reflectivity coating, respectively [10][11][12]. A schematic diagram is shown in figure 1.…”

Section: Vipa Spectrometermentioning

confidence: 99%

An axial length measurement system based on the VIPA spectrometer

Li¹,

Yang²,

Zhou³

et al. 2023

Laser Phys.

View full text Add to dashboard Cite

show abstract

Brillouin microscopic imaging of ex-vivo porcine eye using VIPA-CMOS-based spectrometer

Xu,

Liu,

Lan

et al. 2024

Measurement

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Orthogonal dispersion modeling of double-stage VIPA spectrometer in SBS system

Xu,

Liu,

Luo

et al. 2024

Opt. Express

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Brillouin microscopy enables the assessment of the mechanical properties of biological tissues by mapping the Brillouin shift in three-dimensional (3D), all-optical, label-free, non-contact, and subcellular resolution. The virtually imaged phased array (VIPA) etalon is widely utilized for measuring Brillouin spectra owing to its superior light throughput, large angular dispersion, and rapid signal acquisition capabilities. The VIPA-based spectrometer plays a significant role in Brillouin microscopy, but it is highly sensitive to factors such as the tilt angle, beam radius, lens focal length, and so on. Here, we propose an orthogonal dispersion model based on paraxial wave theory. This model is employed to explore the output intensity distribution and dispersion characteristics of a double-stage VIPA spectrometer. To validate the proposed model, we develop a stimulated Brillouin scattering (SBS) system by leveraging the optimal spectrometer parameters to measure the Brillouin frequency shift in pure water. We demonstrate the capabilities of this model in mitigating spectral dispersion and enhancing spectral measurement accuracy by optimizing the spectrometer's system parameters. This work is pivotal for the future deployment of the double-stage VIPA spectrometer in SBS-based microscopy applications.

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Efficient Processing of Spectral Measurements Using Virtually Imaged Phased Array

Cited by 3 publications

References 18 publications

An axial length measurement system based on the VIPA spectrometer

An axial length measurement system based on the VIPA spectrometer

Brillouin microscopic imaging of ex-vivo porcine eye using VIPA-CMOS-based spectrometer

Orthogonal dispersion modeling of double-stage VIPA spectrometer in SBS system

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