Development of optical grade polycrystalline <scp>YIG</scp> ceramics for faraday rotator

Ikesue, Akio; Aung, Yan Lin

doi:10.1111/jace.15772

Cited by 52 publications

(19 citation statements)

References 15 publications

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“…The relative deviations of the data from the obtained model ( 8 ) are <

, except of the wavelengths above

, where the error increases. As a next step, we have extracted several values of the specific Faraday rotation from the figures found in the available literature sources [ 25 , 44 , 57 , 62 , 63 ], and included them in the second plot, in the Figure 4 b. The deviation of the specific Faraday rotation values found in the available literature from the values given by the model ( 8 ) with the aforementioned fitted parameters is <

in the <

, as well as in the extrapolated >

spectral ranges.…”

Section: Resultsmentioning

confidence: 99%

“…The deviation of the specific Faraday rotation values found in the available literature from the values given by the model ( 8) with the aforementioned fitted parameters is <8% in the <1.8 µm, as well as in the extrapolated >3.5 µm spectral ranges. [rad/m] YIG ceramics [25] YIG crystal [44] YIG crystal [57] YIG crystal [62] YIG crystal [63] (b)…”

Section: Yig Crystalmentioning

confidence: 99%

“…Nevertheless, the fabrication of these crystals is a relatively time-consuming process due to the need for using the floating zone or liquid phase epitaxial methods. These drawbacks have recently prompted researchers to explore the possibility of fabricating the iron garnets in the form of transparent ceramics which would enable reducing the time needed for obtaining the iron-garnet-based magneto-optical elements as well as to manufacture them in larger sizes [ 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

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Faraday Rotation of Dy2O3, CeF3 and Y3Fe5O12 at the Mid-Infrared Wavelengths

et al. 2020

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The relatively narrow choice of magneto-active materials that could be used to construct Faraday devices (such as rotators or isolators) for the mid-infrared wavelengths arguably represents a pressing issue that is currently limiting the development of the mid-infrared lasers. Furthermore, the knowledge of the magneto-optical properties of the yet-reported mid-infrared magneto-active materials is usually restricted to a single wavelength only. To address this issue, we have dedicated this work to a comprehensive investigation of the magneto-optical properties of both the emerging (Dy2O3 ceramics and CeF3 crystal) and established (Y3Fe5O12 crystal) mid-infrared magneto-active materials. A broadband radiation source was used in a combination with an advanced polarization-stepping method, enabling an in-depth analysis of the wavelength dependence of the investigated materials’ Faraday rotation. We were able to derive approximate models for the examined dependence, which, as we believe, may be conveniently used for designing the needed mid-infrared Faraday devices for lasers with the emission wavelengths in the 2-μm spectral region. In the case of Y3Fe5O12 crystal, the derived model may be used as a rough approximation of the material’s saturated Faraday rotation even beyond the 2-μm wavelengths.

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“…The relative deviations of the data from the obtained model ( 8 ) are <

, except of the wavelengths above

in the <

, as well as in the extrapolated >

spectral ranges.…”

Section: Resultsmentioning

confidence: 99%

Section: Yig Crystalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Faraday Rotation of Dy2O3, CeF3 and Y3Fe5O12 at the Mid-Infrared Wavelengths

et al. 2020

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“…The RE-substituted iron garnets possess very high Verdet constant [153][154][155][156] and low saturation magnetization [157], which is the main reason for its wide utilization for low-power applications in telecommunications, medical field or integrated magneto-optical devices [4]. Moreover, a high-grade YIG ceramics has been very recently reported [158], possibly enabling fabrication of large-aperture YIG elements in the near future.…”

Section: Nir-mir Region (λ > 1100 Nm)mentioning

confidence: 99%

Verdet Constant of Magneto-Active Materials Developed for High-Power Faraday Devices

et al. 2019

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We review the progress in the investigation of the Verdet constant of new magneto-active materials for the Faraday-effect-based devices used in high-power laser systems. A practical methodology for advanced characterization of the Verdet constant of these materials is presented, providing a useful tool for benchmarking the new materials. The experimental setup used for the characterization is a flexible and robust tool for evaluating the Faraday rotation angle induced in the magneto-active material, from which the Verdet constant is calculated based on the knowledge of the magnetic field and the material sample parameters. A general model for describing the measured Verdet constant data as a function of wavelength and temperature is given. In the final part of this review, we present a brief overview of several magneto-active materials, which have been to-date reported as promising candidates for utilization in the Faraday devices. This overview covers room-temperature investigations of the Verdet constant of several materials, which could be used for the ultraviolet, visible, near-infrared and mid-infrared wavelengths.

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“…The magneto-optical medium plays a key role in the isolator, so a suitable magneto-optical material is an important factor to promote the development of a Faraday isolator. At present, a lot of widely used magneto-optical materials have been reported, such as YIG (Y 3 Fe 5 O 12 ) [9][10][11], TGG (Tb 3 Ga 5 O 12 ) [12][13][14], and TAG (Tb 3 Al 5 O 12 ) [15][16][17][18][19]. It is known that Ce 3+ , Pr 3+ , Dy 3+ , Ho 3+ , and Tb 3+ ions have excellent magneto-optical properties [20] due to their 4f-5d transition.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Dy2O3 Transparent Ceramics by Vacuum Sintering Using Precipitated Powders

Liu

et al. 2020

Magnetochemistry

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As a kind of promising material for a Faraday isolator used in the visible and near infrared range, Dy2O3 transparent ceramics were prepared by vacuum sintering from the nano-powders synthesized by the liquid precipitation method using ammonium hydrogen carbonate as precipitant with no sintering aids. The synthesized precursor was calcinated at 950 °C–1150 °C for 4 h in air. The influences of the calcination temperature on the morphologies and phase composition of Dy2O3 powders were characterized. It is found that the Dy2O3 powder calcinated at 1000 °C for 4 h is superior for the fabrication of Dy2O3 ceramics. The Dy2O3 transparent ceramic sample prepared by vacuum sintering at 1850 °C for 10 h, and subsequently with air annealing at 1400 °C for 10 h, from the 1000 °C-calcined Dy2O3 powders, presents the best optical quality. The values of in-line transmittance of the optimal ceramic specimen with the thickness of 1.0 mm are 75.3% at 2000 nm and 67.9% at 633 nm. The Verdet constant of Dy2O3 ceramics was measured to be −325.3 ± 1.9 rad/(T·m) at 633 nm, about 2.4 times larger than that of TGG (Tb3Ga5O12) single crystals.

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Development of optical grade polycrystalline YIG ceramics for faraday rotator

Cited by 52 publications

References 15 publications

Faraday Rotation of Dy2O3, CeF3 and Y3Fe5O12 at the Mid-Infrared Wavelengths

Faraday Rotation of Dy2O3, CeF3 and Y3Fe5O12 at the Mid-Infrared Wavelengths

Verdet Constant of Magneto-Active Materials Developed for High-Power Faraday Devices

Fabrication of Dy2O3 Transparent Ceramics by Vacuum Sintering Using Precipitated Powders

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