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Glass material and manufacturing method thereof

A glass material and manufacturing method technology, applied in glass manufacturing equipment, manufacturing tools, glass molding and other directions, can solve the problems of reduced light transmittance, poor light extraction efficiency of magneto-optical equipment, etc., and achieve the effect of high light transmittance

Active Publication Date: 2021-01-26
NIPPON ELECTRIC GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to increase the Faraday effect, it is effective to increase the Tb content in the glass material, but in this case, the light transmittance at the wavelength used (for example, 300 to 1100 nm) tends to decrease, and the light extraction efficiency of the magneto-optical device may be poor. question

Method used

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  • Glass material and manufacturing method thereof
  • Glass material and manufacturing method thereof

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Experimental program
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Embodiment

[0057] Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to these Examples.

[0058] Table 1 shows Examples and Comparative Examples of the present invention.

[0059] [Table 1]

[0060]

[0061] First, the raw material prepared so that it might become the glass composition shown in Table 1 was press-molded, and it fired at 1000-1400 degreeC for 6 hours, and the glass raw material block was produced. Next, the glass raw material mass was roughly pulverized in a mortar to form small pieces of 0.05 to 0.5 g. Using the small pieces of the obtained glass raw material block, by using according to figure 1 Precursor glass (about 1-8mm in diameter) is produced by the vessel-free suspension method of the device. In addition, the type and flow rate of the gas used to suspend the glass raw material block are as described in Table 1, and 100W CO was used as the heat source 2 laser oscillator.

[0062] The obtained precursor gl...

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Abstract

The present invention provides a glass material capable of achieving both high Faraday effect and high light transmittance at the wavelength used. The glass material is characterized by containing more than 40% of Tb in terms of mol% of oxides 2 o 3 , Tb 3+ The ratio to the total Tb is 55% or more in mol%.

Description

technical field [0001] The present invention relates to a glass material suitable for a magneto-optical element constituting a magnetic device such as an optical isolator, an optical circulator, and a magnetic sensor, and a method for manufacturing the same. Background technique [0002] It is known that a glass material containing terbium oxide as a paramagnetic compound exhibits the Faraday effect as one of the magneto-optical effects. The Faraday effect refers to an effect of rotating the plane of polarization of linearly polarized light passing through a material placed in a magnetic field. Such effects are utilized in magneto-optical devices such as optical isolators and magnetic field sensors. [0003] The degree of optical rotation (rotation angle of the plane of polarization) θ obtained by the Faraday effect is represented by the following formula, where H is the strength of the magnetic field and L is the length of the substance through which the polarized light pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/068C03B5/16C03B32/00C03C3/095C03C3/15G02B1/00G02F1/09
CPCC03B40/04C03C4/0085C03C4/10C03B19/063C03B19/1005C03C3/068G02F1/0036G02B1/00C03B5/16C03B32/00
Inventor 铃木太志
Owner NIPPON ELECTRIC GLASS CO LTD