Polycrystalline (Tb_XY_1-X)_2O_3 Faraday rotator

Ikesue, Akio; Aung, Yan Lin; Makikawa, Shinji; Yahagi, Akira

doi:10.1364/ol.42.004399

Cited by 70 publications

(18 citation statements)

References 8 publications

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“…We have already succeeded in synthesizing transparent iron garnet ceramics in which Bi is solid‐dissolved in a large amount, but we will report this case on another occasion in near future. On the other hand, we developed a TYO (Tb 2 O 3 –Y 2 O 3 ) ceramic which is difficult to synthesize with single crystal growth methods in the visible to near infrared wavelength range where iron magnetic garnet such as YIG cannot be used . This material possesses about 4 times higher Verdet constant than the commercially available TGG (Tb 3 Ga 5 O 12 ) single crystal, which is regarded as highest class.…”

Section: Resultsmentioning

confidence: 99%

Development of optical grade polycrystalline YIG ceramics for faraday rotator

Ikesue¹,

Aung²

2018

J Am Ceram Soc

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Fully dense and infrared transparent YIG (Y3Fe5O12) ceramics was successfully produced by solid‐state reaction of Y2O3 and Fe2O3 powders. Its relative density reached 99.8% (5.16 g/cm3) after sintered at 1400°C for 3 hours, and almost 100% relative density (5.17 g/cm3) was obtained by additional HIP treatment. It was transparent at wavelength ranges longer than 1100 nm, and its in‐line transmittance (ca. 75%‐77%) was very comparable to that of commercial YIG single crystal especially over 1700 nm. Faraday rotation angle at 1300 and 1550 nm was 224 and 175 deg/cm, respectively, and extinction ratio was 35 dB and insertion loss polarized at 45° was 0.3 dB at 1550 nm. It was confirmed that the Faraday effect of polycrystalline material which has numerous grain boundaries and randomized crystal orientations is analogous to that of the single crystal. To the best of our knowledge, this is the first report to achieve highly transparent polycrystalline iron garnet ceramics successfully, and it is expected to use as an optical isolator in optical communication and medical field.

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Section: Resultsmentioning

confidence: 99%

Development of optical grade polycrystalline YIG ceramics for faraday rotator

Ikesue¹,

Aung²

2018

J Am Ceram Soc

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“…Snetkov et al synthesized Tb 3+ :Y 2 O 3 ceramics [32] but the transparency of their material is extremely poor and it cannot be used for optical applications. Although the basic characteristics of the TYO ceramics were reported in our previous paper [33], it is important to demonstrate the total performance parameters which are required to determine it to be a practical Faraday rotator material.…”

Section: Discussionmentioning

confidence: 99%

Total Performance of Magneto-Optical Ceramics with a Bixbyite Structure

Ikesue¹,

Aung²,

Makikawa

et al. 2019

Materials

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High-quality magneto-optical ceramics (TbxY1−x)2O3 (x = 0.5–1.0) with a Bixbyite structure were extensively investigated for the first time. The total performances of these ceramics were far superior to those of commercial TGG (Tb3Ga5O12) crystal, which is regarded as the highest class of Faraday rotator material. In particular, the Verdet constant of Tb2O3 (when x = 1.0) ceramic was the largest—495 to 154 rad·T−1·m−1 in the wavelength range of 633 to 1064 nm, respectively. It was possible to further minimize the Faraday isolator device. The insertion loss of this ceramic was equivalent to that of the commercial TGG single crystal (0.04 dB), and its extinction ratio reached more than 42 dB, which is higher than the value for TGG crystal (35 dB). The thermal lens effect (1/f) was as small as 0.40 m−1 as measured by a 50 W fiber laser. The laser damage threshold of this ceramic was 18 J/cm2, which is 1.8 times larger than that of TGG, and it was not damaged during a power handling test using a pulsed laser (pulse width 50 ps, power density 78 MW/cm2) irradiated at 2 MHz for 7000 h.

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“…The sodium terbium fluoride (NTF) [50,119] and the potassium terbium fluoride (KTF) crystals [72,120,121] also deserve attention: although they possess ∼20% lower Verdet constant, they exhibit a higher FOM parameter than the TGG crystal. Notable characteristics were recently reported for the rare-earth (RE) sesquioxide ceramics (RE 2 O 3 ; RE = Tb [122][123][124][125][126][127], Dy [48,[128][129][130] or Ho [47,[131][132][133]), which possess high concentrations of the magnetically-active RE 3+ ions. Among these, Tb 2 O 3 holds the record Verdet constant (∼3.5 times higher than TGG), followed by the Dy 2 O 3 (∼2 times higher (at 633 nm wavelength)) and Ho 2 O 3 (∼1.4 times higher (at 1064 nm wavelength)).…”

Section: Vis-nir Region (400 < 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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Polycrystalline (Tb_XY_1-X)_2O_3 Faraday rotator

Cited by 70 publications

References 8 publications

Development of optical grade polycrystalline YIG ceramics for faraday rotator

Development of optical grade polycrystalline YIG ceramics for faraday rotator

Total Performance of Magneto-Optical Ceramics with a Bixbyite Structure

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

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