Bismuth blended germanium base optical glass

Abstract

The Bi doped germanium base optical glass has the molar composition of: GeO2 90-99.98 mol%, M 0.01-9 mol%, Bi2O3 0.01-5 mol%, where M is Al2O3, Ta2O5, Ga2O3 or B2O3. The glass has absorption spectrum covering the area from visible light to near infrared, central fluorescent spectrum wavelength in 1300 nm, fluorescent life greater than 0.2 ms and fluorescent full width at half maximum greater than 200 nm, and may be pumped with laser of 532 nm, 632.5 nm and 808 nm wavelength. These kinds of optical glass are expected to find the use in ultra wide band amplifier, high power laser, tunable laser and other technological fields.

Description

technical field [0001] The invention relates to optical glass, in particular to a bismuth-germanium-doped optical glass and a preparation method thereof. The glass can emit fluorescence in the near-infrared communication band, has a long fluorescence lifetime and a wide gain bandwidth, and is suitable for use as a gain medium in an optical amplifier and / or lasers. Background technique [0002] On March 4, 1998, Yasushi Fujimoto and others of Mitsubishi Cable Industries Co., Ltd. applied for a patent entitled "Method for Manufacturing Bismuth-doped Quartz Glass, Optical Fiber and Optical Amplifier" (Patent Publication No. 11-29334). They used bismuth-exchanged zeolite as a dispersion medium, integrated the sol-gel method and high-temperature melting method, prepared bismuth-doped quartz glass, drew the corresponding optical fiber, and achieved optical amplification at 1.3 μm under 0.81 μm pumping. The fluorescence peak of this glass is located near 1130nm, the maximum fluore...

AI Technical Summary

Problems solved by technology

Its disadvantage is that the gain bandwidth of C-Band EDFA is only 35nm, which only covers a part of the low-loss window of quartz single-mode fiber, which restricts the number of wavelength channels that the fiber can inherently accommodate; however, with the rapid development of Internet technology and the acceleration of the information process , the transmission capacity of the optical fiber transmission system is required to be continuously expanded, and there are currently three main solutions to expand the transmission capacity: (1) increase the transmission rate of each wavelength; (2) reduce the channel spacing; (3) increase the total transmission bandwidth

For the first method, if the rate is increased to 10Gbit / s, it will bring new dispersion compensation problems, and the current electronic system still has the so-called "electronic bottleneck" effect problem

In the second method, if the signal spacing is reduced from 100GHz to 50GHz or 25GHz, nonlinear effects such as four-wave mixing (FWM) will be brought to the system, and the system is required to adopt wavelength stabilization technology

However, since the general-purpose transmission medium is glass fiber material, it is difficult for crystal materials to be connected to communication systems, so it is natural for people to think of doping transition metal ions into glass matrix materials, so that the above-mentioned docking problems can be solved. solved

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