Rapid determination of Faraday rotation in optical glasses by means of secondary Faraday modulator

Sofronie, M.; Elisa, M.; Sava, Bogdan Alexandru; Boroica, Lucica; Văleanu, M.; Kuncser, V.

doi:10.1063/1.4920920

Cited by 11 publications

(6 citation statements)

References 18 publications

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“…Verdet constant is calculated using Equation : 46,47

θ_{normalF} = V B d,

where θ F is directly proportional with the applied magnetic field, B , the geometrical path of the light through the glass (eg, the glass thickness), d, and a proportional constant, V , named Verdet constant that is a specific for each material. Verdet constant in dependence on visible wavelength is presented in Figure 6B.…”

Section: Resultsmentioning

confidence: 70%

Synthesis and characterization of a titanium phosphate‐tellurite glass for Faraday rotators

et al. 2020

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This work is focused on investigation of thermal, structural, optical, magnetic, and magneto‐optical properties of novel titanium phosphate‐tellurite glass applied as Faraday rotators. The glass belonging to the system 35Li2O–10Al2O3–5TiO2–45P2O5–5TeO2 was prepared by a nonconventional wet route of raw materials processing, followed by melting‐quenching‐annealing steps. Some important physical properties of the investigated glass have been measured and calculated, providing knowledge related to glass compactness, electronic structure, glass forming capability, etc. XRD analysis evidenced an amorphous network structure of the investigated glass. The optical absorption in the Vis domain is mainly due to Ti3+ ions and Te2 clusters formed during the glass melting process. A relatively low optical absorption is noticed over 600 nm that activates a significant Faraday magneto‐optical effect. Photoluminescence bands in the blue, red, and infrared domains are observed, caused by Te2 clusters formed during the glass melting process. The magnetization in dependency on applied magnetic field reveals a complex behavior of the glass, depending on temperature. Thus, it is found a ferromagnetic behavior up to 2000 Oe, a paramagnetic component up to 40 000 Oe, followed by a diamagnetic one over 40 000 Oe. Faraday rotation angle and Verdet constant values in the visible domain are correlated with the reduced TeO2 content of the glass.

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“…Verdet constant is calculated using Equation : 46,47

θ_{normalF} = V B d,

Section: Resultsmentioning

confidence: 70%

Synthesis and characterization of a titanium phosphate‐tellurite glass for Faraday rotators

et al. 2020

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show abstract

“…The Faraday rotation angle, θ F , is directly proportional with the applied magnetic field, B , the geometrical pathway of the light through the glass (e.g., the thickness of the glass), d , and a proportional constant, V , named Verdet constant that is a characteristic for each material. Verdet constant was calculated using Equation (9) [ 9 , 10 ]:

…”

Section: Resultsmentioning

confidence: 99%

“…It is worth mentioning the previous results of the authors related to magnetic and magneto-optical properties of Dy 3+ /Tb 3+ /La 3+ alumina-phosphate vitreous systems applied as bulk Faraday rotators [ 9 , 10 , 11 ] as well as to the rare-earth-doped silico-phosphate sol–gel thin films for magneto-optical applications [ 12 ]. A very recent work of the authors also referred to thermal, structural, mechanical, magnetic and magneto-optical properties of Bi 2 O 3 and PbO-doped boron-phosphate glasses [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

A New Zinc Phosphate-Tellurite Glass for Magneto-Optical Applications

et al. 2020

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This work investigates the structural, magnetic and magneto-optical properties of a new zinc phosphate-tellurite glass belonging to the 45ZnO-10Al2O3-40P2O5-5TeO2 system. The glass was prepared by a wet method of processing the starting reagents followed by suitable melting–stirring–quenching–annealing steps. Specific parameters such as density, average molecular mass, molar volume, oxygen packaging density, refractive index, molar refractivity, electronic polarizability, reflection loss, optical transmission, band gap and optical basicity have been reported together with thermal, magnetic and magneto-optical characteristics. Absorption bands appear in the blue and red visible region, while over 600 nm the glass becomes more transparent. FTIR and Raman spectra evidenced phosphate-tellurite vibration modes proving the P2O5 and TeO2 network forming role. Magnetic measurements reveal the diamagnetic character of the Te-doped glass with an additional weak ferromagnetic signal, specific to diluted ferromagnetic oxides. Positive Faraday rotation angle with monotonous decreasing value at increasing wavelength was evidenced from magneto-optical measurements. The final product is a composite material comprising of a non-crystalline vitreous phase and Te-based nanoclusters accompanied by oxygen vacancies. The metallic-like Te colloids are responsible for the dark reddish color of the glass whereas the accompanying oxygen vacancies might be responsible for the weak ferromagnetic signal persisting up to room temperature.

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“…The typical applications involving the measurement of Faraday rotation include highly sensitive atomic magnetometers [1,3,5] , atomic sensors [6,7] , experiments on fundamental physics [2,4] , optical isolators [8] , optical modulators [9] , magnetic field, and current sensor [10][11][12] . Different polarimetry techniques have been demonstrated to measure the Faraday rotation with and without any modulation [2,4,[12][13][14][15][16][17][18][19][20] . The simplest polarimeter requires two linear polarizers, a laser light source, and a photodetector (PD).…”

mentioning

confidence: 99%

“…A widely used modulation technique by means of magneto-optical effects is known as Faraday modulation. In this technique, the plane of polarization of light is modulated by the optical Faraday effect [1][2][3][4]13,15,17,22] . The spectral decomposition of the Faraday rotation output signal gives a steady state DC component and modulated AC components.…”

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confidence: 99%

Noise reduction and signal to noise ratio improvement in magneto-optical polarization rotation measurement

Basharat

Ding

et al. 2018

Chin. Opt. Lett.

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The measurement of an extremely small magneto-optical polarization rotation angle with high sensitivity is integral to many scientific and technological applications. In this Letter, we have presented a technique based on Faraday modulation combined with the optical differential method to measure an extremely small polarization rotation angle with high sensitivity. The theoretical and experimental results show that common mode noise is reduced appreciably and signal to noise ratio is enhanced. The effectiveness of this technique has been demonstrated by measuring the Verdet constant of terbium gallium garnet glass and measuring the small polarization rotation angle. A sensitivity of enhancement of one order of magnitude has been achieved using differential detection based on Faraday modulation.

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Rapid determination of Faraday rotation in optical glasses by means of secondary Faraday modulator

Cited by 11 publications

References 18 publications

Synthesis and characterization of a titanium phosphate‐tellurite glass for Faraday rotators

Synthesis and characterization of a titanium phosphate‐tellurite glass for Faraday rotators

A New Zinc Phosphate-Tellurite Glass for Magneto-Optical Applications

Noise reduction and signal to noise ratio improvement in magneto-optical polarization rotation measurement

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