Bismuth-doped silicophosphate-based optical glass and preparation method thereof

Abstract

The invention provides bismuth-doped silicophosphate-based optical glass and a preparation method thereof. The preparation method comprises the following steps of: uniformly mixing the following components in percentage by mole: 34.9-64.9 percent of SiO2, 8-20 percent of P2O5, 15-35 percent of Al2O3, 15-45 percent of RO and / or RCO3 and 0.1-5 percent of Bi2O3; heating the mixture to 1,300-1,600 DEG C, preserving heat for 30-180 minutes and melting the raw material to be in a liquid state; and annealing at 500-650 DEG C for 0.5-6 hours, and naturally cooling to room temperature to obtain the bismuth-doped silicophosphate-based optical glass. The bismuth-doped silicophosphate-based optical glass has the ultra-broadband optical performance of covering an entire communication waveband, the melting temperature is remarkably lowered relative to quartz glass, and the viscosity of the melting liquid in the melting process of the glass is lowered, so that the defects (such as air bubbles and the like) in the melting and molding processes of the glass are reduced compared with those of quartz glass, the mechanical performance of the glass is improved, and infrared illumination intensity of bismuth in the glass is high.

Description

technical field [0001] The invention relates to an optical glass, in particular to a bismuth-doped silicon phosphate-based optical glass and a preparation method thereof. Background technique [0002] On March 4, 1998, Yasushi Fujimoto and others of Mitsubishi Electric Wire Industries Co., Ltd. applied for a patent entitled "Manufacturing Method of Secret-doped Quartz Glass, Optical Fiber and Optical Amplifier" (Patent Publication No. 11-29334). They used bismuth-exchanged zeolite as a dispersion medium, combined the sol-gel method and high-temperature melting method, and prepared pentavalent secret ion Bi in air. 5+ The corresponding optical fiber was drawn out of quartz glass, and the optical amplification at 1.3 μm under 800nm ​​pumping was realized. The fluorescence peak of this glass is located near 1130nm, the maximum fluorescence half-maximum width is 250nm, the maximum fluorescence lifetime is 650μs, and the stimulated emission cross section is about 1.0 × 10-20cm ...

AI Technical Summary

Problems solved by technology

[0004] In 2001, Fujimoto and Nakatsuka reported in Jpn. J. App. Phys., 40, (2001) L279 the preparation of pentavalent bismuth ions Bi 5+ Doped A1 2 o 3 -SiO 2 Glass, the existence of a large number of bubbles reduces its transmittance in the infrared region to about 30%, which largely limits the SiO 2 Practical Applications of Base Glass

However, the infrared luminous intensity of the original bismuth-doped glass is relatively weak compared with the rare earth ions used as optical fiber amplifiers, which is not conducive to the use as optical amplifier materials; although microcrystallization of glass can improve the strength of glass, the glass The microcrystals formed in the matrix are easy to cause the reflection and refraction of light in the glass, resulting in reduced light transmission efficiency and weakened light amplification effect