ACTIVITY REPORT Department of Physics and Measurement
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Based on the Tb 2 O 3 -B 2 O 3 -Al 2 O 3 - SiO 2 system and the effect of each component on glass formation, glass compositions were selected for development of new Faraday rotator glasses. rotated in traversing a measured thickness of flint glass under the influence of a magnetic field, for several wavelengths and several field strengths. 2. The Verdet constant V = /BD for each of the several wavelengths, from the data obtained in 1. A linear relationship is also established between the Verdet constant and ��� �𝜆 where λ is the wavelength and n is the index of refraction for the glass rod. The Verdet constant is determined to be: 𝑉=−[−0.6787±0.1400+0.81195±0.0152 × ⅇ 2�𝑐 � ⅆ� ⅆλ ] Exp-1 Observing the rotation of the polarization plane when polarized monochromatic light passes through flint glass under influence of a magnetic field. Exp-2 Determining Verdet's constant from the relation between rotation angle and magnetic flux.
(USA For SF-59 glass, the Verdet constant (at 650 nm) is 23 rad T −1 m −1. Assuming the glass rod is 0.15 m long, θ will be 0.086 rad or 4.9°. So, a 3 A current supplied to the solenoid will produce a rotation of a little less than 5° in the plane of a polarized light beam at 650 nm with SF-59 glass. The angle of rotation is given by θ = V l B, where V is the Verdet constant of the glass (given in radians/m·T), l is the length of the glass rod, and B is the magnetic field.
This quartz glass is being used at the Belle II experiment at Tsukuba, Japan. The Verdet constant is measured using the Faraday effect — a magneto-optical phenomenon that describes the rotation of the plane of polarization of TGG (Terbium Gallium Garnet) single crystal is currently the best and widely used magneto-optical material in Faraday rotator and isolator due to its extremely high Verdet constants in the range of 400nm-1100nm(excluding 475-500nm).
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The wavelength and temperature dependencies of the Verdet constants of samples have been investigated in the ranges of 400 to 800 nm and 100 to 300 K. The results show field, verdet constant. Introduction he phenomenon of Faraday Effect was first discovered Michael Faraday in 1845. He discovered for the concrete evidence for the relation between the branch of Optics, magnetism and atomic Physics. He found out that when a block of glass is subjected to a strong magnetic field, it becomes Verdet Constant V (min/Oe.cm): 632.8nm-0.258-0.361: Verdet Constant V (min/Oe.cm): 1064nm-0.075-0.106 I CANNOT find a reference for the Verdet Constant of SF59 glass at 650nm (found V for many other wavelengths).
myPHD/constraint.txt at master · nghoang/myPHD · GitHub
Optical losses are lower for TGG than Tb-doped glasses.
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For the SF-57 glass rod sold with the TeachSpin apparatus, the Verdet constant for 650 nm light is 23 rad/Tm. The “standard” strategy for measuring this rotation is to place a linear polarizer on each end of the solenoid containing the transparent material and cross them at 90°.
The material used in this experiment to display the Faraday effect is an expensive piece of heavy flint glass in the form of a long prism. Verdet constant for several materials and obtain the value of e/m, the charge to mass ratio for the electron. Equipment Electromagnet (Atomic labs, 0028), magnet power supply (Cencocat. #79551, 50V-5A DC, 32 & 140 V AC, RU #00048664), gaussmeter (RFL Industries), High Intensity
Verdet Constant: -0.33min/Oe*cm or -96rad/T*m at 632.8 nm Verdet Constant: -0.11 min/Oe*cm or -31.4 rad/T*m at 1064 nm Transmission window: 400nm-1600nm Type MR3-2 glass is characterized by a high Verdet constant and a lower nonlinear refractive index n2 to avoid self-focusing in high power laser system.
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The observed hysteresis effect is briefly discussed. Materials with a high Verdet constant and good optical quality are very useful in con- structing efficient magneto-optical devices, like optical isolators; among those materials we can mention the TGG (terbium gallium garnet) crystals. Compared to the host glass, Fe3O4 nanoparticles doped glasses shown enhanced Faraday Effect in term of Verdet constant and will have potential application in magneto-optical devices.
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Compared to the host glass, Fe3O4 nanoparticles doped glasses shown enhanced Faraday Effect in term of Verdet constant and will have potential application in magneto-optical devices. Effect of Magnetite Nanoparticles Doped Glass with Enhanced Verdet Constant for Magnetic Optical Current Transducer Applications | Scientific.Net The Verdet constant is as large as 0.200 min G −1 cm −1 at 980 nm for 22.5GeS 2 –67.5Sb 2 S 3 –10PbI 2 composition glass, which is the largest value reported thus far for sulfide glasses; this glass also possesses good thermal and optical properties and therefore might be an attractive candidate for mid‐infrared magneto‐optical device applications. Faraday rotator glass has been used for magneto-optical isolator, switch, modulator and sensor. Faraday rotator glasses have been developed by LLG. TG20 is a high Verdet constant glass in common use.. merit of magneto-optical glass is the Verdet constant which is an intrinsic material property and represents the quantitative measure of Faraday rotation ability of Abstract- Verdet constant describes the strength of Faraday Effect for a particular material. The For performing experiment with flint glass, one requires a very The proportionality between the angle of optical rotation and the magnetic field and the decrease of Verdet's constant with the wavelength λ are verified.
The objectives of this experiment are to measure the Verdet constant for a sample of dense flint glass using Faraday effect and to compare The Verdet Constant of Light Flint Glass. Thomas G. Spears. Physics Department, The College of Wooster, Wooster, Ohio 44691. (Dated: May 1, 2003). Faraday rotation tests on the glass nanocomposite shows giant enhancement in verdet constant due to BiPO4 nanoparticles in phosphate glass. The BiPO4 In this experiment, you will measure the Verdet constant for distilled water. It is an case consists of distilled water inside a quartz glass tube.