Automated interferometric technique for express analysis of the refractive indices in isotropic and anisotropic optical materials

Andrushchak, Anatoliy; Tybinka, B.V.; Ostrovskij, I.P.; Schranz, W.; Kityk, A. V.

doi:10.1016/j.optlaseng.2007.08.006

Cited by 26 publications

(6 citation statements)

References 10 publications

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“…The optical pathlength, Δ k , induced by the applied stress, m , can be compensated by rotating the quartz plate by angle ( Δ k = Δ( )) in a way to keep the output light intensity at the same level. Following the route given in [38] it is easily to show that the angular changes of the optical pathlength are defined as Δ( ) = [ 1 − cos − + ( 2 − si n 2 ) 1∕2 ] ,…”

Section: Methodsmentioning

confidence: 99%

Characterization of photoelastic materials by combined Mach-Zehnder and conoscopic interferometry: Application to tetragonal lithium tetraborate crystals

Mytsyk

Andrushchak

Vynnyk

et al. 2020

Optics and Lasers in Engineering

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Mach-Zehnder and conoscopic interferometry are used to explore photoelastic properties of anisotropic crystal materials. In a number of cases an application of both techniques significantly improves an accuracy of piezoop-tic and photoelastic measurements. The performance of such combined approach is demonstrated on tetragonal lithium tetraborate (LTB) single crystals, as an example. Special attention is paid to methodological and metrological aspects, such as measurement accuracy and the quantitative error analysis of the resulting measurements. Performing the interferometric measurements for different geometries of piezooptic coupling the full sets of piezooptic and photoelastic tensor constants of LTB crystals have been determined. The acoustooptic efficiency, on the other hand, has been evaluated using the magnitudes of photoelastic constants derived from the piezooptical measurements. For the geometries with strong photoelastic coupling LTB demonstrates quite large acous-tooptic performance with figure of merit value, М 2 , achieving 2.12 × 10 -15 s 3 /kg. It is several times larger than that of strontium borate crystals, nowadays the best acoustooptic material in deepultraviolet spectral region.

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Section: Methodsmentioning

confidence: 99%

Characterization of photoelastic materials by combined Mach-Zehnder and conoscopic interferometry: Application to tetragonal lithium tetraborate crystals

Mytsyk

Andrushchak

Vynnyk

et al. 2020

Optics and Lasers in Engineering

Self Cite

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“…For the details regarding the derivation of Eq. (2), we refer readers to the recent publications [13, 14]. The difference in the optical path lengths δΔ = Δ(φ) – Δ(0) may be determined from the interference pattern shift, whereas the sample is turned out from its ZP on the angle φ.…”

Section: Laboratory Setupmentioning

confidence: 99%

Interferometry technique for refractive index measurements at subcentimeter wavelengths

Andrushchak

Syrotynsky

Karbovnyk

et al. 2011

Micro & Optical Tech Letters

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tends to be sensitive to the tolerances in both the design and fabrication, some related sensitivity analyses based on the proposed parameters have been performed, and it is found that the tuning distortion caused by the variation of resonant frequency of each resonator have some noticeable effect on the desired response. CONCLUSIONThis letter presents the synthesis of a narrow-band bandpass filter for CDMA2000 communications systems, which has a 14pole general Chebyshev function response with a passband of 11.2 MHz at 830 MHz. The coupling matrix of the filter is derived from cost function using nonlinear LM algorithm. The filter response with two pairs of TZs for group delay self-equalization and one pair of TZs at finite frequencies for high selectivity requirement is implemented by using three CQ coupling structures. The frequency responses demonstrating a good agreement between the measured and the simulated specifications are obtained. The proposed method can be further exploited for various mobile communication system applications.

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“…In biological sciences, refractometry was employed to determine salinity levels due to total plasma protein (TPP) in fish blood samples 1 and in avian species, 2 to study the molecular basis of virus entry by analyzing the interactions between cellular receptors of herpes virus and the viral glycoproteins in a molecular level, 3 to evaluate the purity and the quality of antimalarial drugs, 4 to rapidly measure glucose concentration in blood, 5,6 and to diagnose and evaluate the evolution of tumors in breast tissues. 7 By performing refractive index measurements, the study of bubble flow, 8 as well as the characterization of optical, 9 polymeric, 10,11 and chemical 12,13 materials can be carried out. For such a large variety of applications many refractometry devices were proposed and developed concerning the particularities of each application.…”

Section: Introductionmentioning

confidence: 99%

Design, construction, and performance of a real-time holographic refractometry prototype for liquid analysis

Barbosa

Silva

Preto

et al. 2011

Review of Scientific Instruments

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The development and the performance of a portable holographic refractometer prototype for liquid measurement employing multimode diode lasers with emission centered at 662 nm as light sources is reported. Due to the multiwavelength character of the holographic recording, a synthetic wavelength was generated, and the diffracted wave intensity was thus modulated as a function of the optical path difference between the reference and the object beams. The transparent test cell containing the liquid was placed at the reference-beam arm of the optical setup, while the contour interferogram generated on the holographic image of a flat object was used for fringe counting. A change L on the liquid column length is proportional to the p running fringes on the object image, and from this relation the refractive index of the test liquid was obtained. The holograms were recorded on a photorefractive Bi 12 TiO 20 crystal whether using a single multimode diode laser or by combining two diode lasers. In the latter configuration the synthetic wavelength can be varied in order to enhance the measurement sensitivity and/or to allow the analysis of turbid liquids. The size of the whole prototype is 54 × 22 × 14 cm 3 . The refractive indexes of ethanol/water mixtures with different concentrations were measured, as well as the NaCl concentrations in aqueous solutions were determined upon comparison with an empirical curve. In both cases the results were compared with the ones obtained through an Abbe refractometer.

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Automated interferometric technique for express analysis of the refractive indices in isotropic and anisotropic optical materials

Cited by 26 publications

References 10 publications

Characterization of photoelastic materials by combined Mach-Zehnder and conoscopic interferometry: Application to tetragonal lithium tetraborate crystals

Characterization of photoelastic materials by combined Mach-Zehnder and conoscopic interferometry: Application to tetragonal lithium tetraborate crystals

Interferometry technique for refractive index measurements at subcentimeter wavelengths

Design, construction, and performance of a real-time holographic refractometry prototype for liquid analysis

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