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Faraday-rotation phosphorate glass with low non-linear refractivity

A technology of Faraday rotation and optical glass, applied in nonlinear optics, optics, instruments, etc., can solve the problems of poor stability of glass formation and achieve good glass stability and optical uniformity

Inactive Publication Date: 2002-04-03
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

And high Tb 2 o 3 The glass formation stability of the content glass is poor, and other glass oxides and intermediate oxides must be introduced, a small amount of SiO 2 , B 2 o 3 and Al 2 o 3 The introduction is necessary

Method used

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Embodiment Construction

[0023] Glass composition, Verdet constant and V / n of the present invention 2 Listed in Table 1.

[0024] Prepare batch according to the glass composition of the present invention listed in table 1, and used raw material is respectively: Tb 4 o 7 ,P 2 o 5 or H 3 PO 3 , Al(PO 3 ) 3 or Al(OH) 3 、H 3 BO 3 , Sb 2 o 3 、As 2 o 3 , K 2 O, Na 2 O, BaO, SrO can be introduced with corresponding nitrates or carbonates. The raw materials are mixed and put into a quartz crucible, melted and clarified at a temperature of 1300-1350°C, and the melting or clarification time depends on the size of the crucible. The melted glass is transferred into a platinum crucible, stirred with a ceramic or platinum stirrer, the temperature is gradually lowered, and poured into a preheated mold at 1200-1300 ° C. After the glass is hardened, it is transferred to an annealing furnace for annealing to obtain an optically uniform glass. Finished optical glass.

[0025] From among the 11 example...

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Abstract

A Farady rotating phosphorate glass with low non-linear refractivity and high content of Tb3+ for Farady rotator is on the basis of Tb2O3 and P2O5, and contains Tb2O3 (17-26 mol%), P2O5 (70-80), and small quantity of Sb2O3 and / or As2O3, and further including small-quantity of Al2O3, B2O3, SiO2, R2O and RO. Its advantages are high Verdet constant, low non-linear refractivity, high transparency in visual light or near infrared region, and high stability.

Description

Technical field: [0001] The present invention relates to a low nonlinear refractive index phosphate Faraday rotator glass for Faraday rotators, in particular to high Tb 2 o 3 content of optically active glass. And it has a large Verdet constant, a small nonlinear refractive index (n 2 ), which can be made into optically active glass with large size and high uniformity. That is to say, it involves a glass material that has a large Faraday effect and is used to manufacture Faraday rotators. Background technique: [0002] In the structure of a Faraday rotator, a coil passing a direct current generates a longitudinal magnetic field in an optically active material, and when linearly polarized light passes through, the polarization plane rotates. The rotation angle is θ minutes (min) [0003] θ=VLH Wherein, L is the length (cm) of the optically active material, H is the magnetic field strength, and the unit is Oe, and V is an intrinsic constant of the optica...

Claims

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Application Information

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IPC IPC(8): C03C3/16C03C3/17
CPCC03C3/16C03C3/17
Inventor 蒋亚丝周蓓明
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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