Journal ArticleDOI
Jones matrix analysis of magnetooptical media and read-back systems
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TLDR
A Jones matrix approach is used to study a magnetooptic read-back system which uses a wave plate for maximizing the signal and minimizing the noise.Abstract:
A Jones matrix approach is used to study a magnetooptic read-back system which uses a wave plate for maximizing the signal. The effects and interactions of Kerr rotation, Kerr ellipticity, birefringence in the substrate and in the optical system, and misalignment of the optical components are considered. Several criteria are developed for maximizing the signal and minimizing the noise.read more
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Patent
Optical Recording Medium
TL;DR: In this article, an optical recording medium consisting of a substrate, a first information layer and a second information layer, which are disposed on the substrate through an intermediate layer in a laminar structure.
Journal ArticleDOI
Influence of birefringence on the signal quality of magnetooptic disks using polycarbonate substrates
TL;DR: Magnetooptic (MO) disks using polycarbonate (PC) substrates were investigated and the effect of the birefringence on the signal quality was estimated.
Journal ArticleDOI
Compositing orbital angular momentum beams in Bi4Ge3O12 crystal for magnetic field sensing
TL;DR: In this article, the rotation angle of petal-like patterns of OAM beams propagating in a Bi4Ge3O12 crystal under an applied magnetic field was investigated.
Journal ArticleDOI
Measurement of birefringence for optical recording of disk substrates
TL;DR: Investigation of the birefringence of bare and coated substrates for magneto-optical recording, using ellipsometry at wavelengths of 632.8 and 780 nm, shows that one of the principal axes is always along the substrate's normal direction, but the orientations of the in-plane principal axes can be much different from the radial and track directions.
Journal ArticleDOI
Effect of disk birefringence on a differential magneto-optic readout.
TL;DR: The effect of disk birefringence on the signal-to-noise ratio of a differential magneto-optic readout is evaluated and it is shown that this effect may be represented by two parameters J(2) and J(3) that depend only on the bireFringence and the numerical aperture of a beam illuminating the disk.
References
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Journal ArticleDOI
PtMnSb, a material with very high magneto‐optical Kerr effect
TL;DR: In this article, the double magneto-optical Kerr effect was measured at room temperature on the Heusler alloy PtMnSb in the wavelength range 280-2000 nm.
Journal ArticleDOI
Signal and noise in magneto-optical readout
TL;DR: In this article, the power spectral density of the read signal has been derived for a magneto-optical readout system which uses the Kerr effect, and the noise components originating in the photodetection and amplification stages appear as additive terms in the expression for the overall spectral density.
Journal ArticleDOI
Magneto-optical spectra of RF-sputtered amorphous Gd-Co and Gd-Fe films
Katsuaki Sato,Yuji Togami +1 more
TL;DR: In this paper, the spectral properties of polar magneto-optical effects of Gd-Co and gd-Fe have been studied and it has been shown that Kerr rotation increases gradually from the visible to the near ir region with a hump around 1 eV and Kerr ellipticity changes sign at a certain photon energy.
Proceedings ArticleDOI
Signal-To-Noise In Magneto-Optic Storage
TL;DR: In this paper, the power spectral density of the read signal for a magneto-optical readout system based on the polar Kerr effect has been analyzed and a criterion for optimum performance deriving from the signal to noise ratio is defined and it is shown that a quadrilayer disk structure which acts as an interference device for the enhancement of the Kerr effect is superior to other structures.
Proceedings ArticleDOI
Static Tests Of TbFe Films For Magneto-Optical Recordings
David Cheng,David Treves,Tu Chen +2 more
TL;DR: In this paper, a number of TbFe thin films on 2"x2" glass slides were evaluated as candidates for an erasable memory, and it was shown that a variation of a factor of 2 in write power can be tolerated without an appreciable loss in either resolution or error rate.