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Glass for optical amplifier fiber

An optical amplifier and amplifier technology, applied in the field of optical fiber, can solve the problem of unsatisfactory optical amplifier fiber

Inactive Publication Date: 2010-09-08
艾利森电讯公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, optical amplifier fibers for conventional telecommunication systems are far from satisfactory, and there is a considerable demand for improved glass compositions to achieve broadband amplification of optical signals

Method used

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  • Glass for optical amplifier fiber
  • Glass for optical amplifier fiber
  • Glass for optical amplifier fiber

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Embodiment Construction

[0016] Figure 1 illustrates the basic structure of a typical fiber optic cable. An optical fiber 10 including a core 12 and a cladding 14 is illustrated. The core 12 is a transparent glass material through which light travels. The core is surrounded by a cladding 14 of another glass plate, the cladding generally having a lower refractive index than the core. The cladding acts like a mirror, reflecting light back to the core so that the light propagates through the fiber 10 by internal reflection. The exterior of the optical fiber 10 is covered by a protective coating 16 of an insulating material.

[0017] If the optical fiber is used for amplification purposes, the core glass is usually doped with substances capable of fluorescing, such as rare earth ions. The light from the pump source induces the electronic transition of the rare earth ions to a temporary excited state, and the light of the input signal stimulates the spontaneous emission of the excited level. The light ...

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Abstract

A germanate glass composition suitable for use in a fiber amplifier for broadband amplification of optical signals is provided. The glass preferably includes 35-75 % GeO2, 0-45 % PbO, 5-20 % BaO, 5-20 % ZnO, and 2-10 % R2O (R=Na, Li, K). It is doped with thulium ions (Tm3+) and codoped with holmium ions (Ho3+). The glass composition of the invention results in a remarkably large bandwidth as compared with previous glasses. It is also highly compatible with existing silica optical fibers.

Description

technical field [0001] This invention relates to optical fibers, and more particularly to glass compositions for optical fiber amplifiers for amplifying optical signals. Background technique [0002] Today's telecommunications networks generally use optical fibers to transmit signals. Optical signals are transmitted over long distances by means of optical carriers, and features such as long legs and power splitting make it necessary to amplify weak signals. Optical amplifiers typically include relatively short amplifier fibers doped with rare earth ions or other species capable of fluorescing. The light from the pump source makes the electrons of the rare earth ions jump to a temporary excited state, and the light of the input signal stimulates the spontaneous emission of the excited level. The light thus emitted exhibits the same characteristics (wavelength, polarization and direction of propagation) as the input signal and the emission increases the gain of the input sig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C4/00H01S3/067C03C13/04C03C3/253
CPCC03C3/253H01S3/06716C03C13/048C03C4/0071C03C3/32
Inventor Y·默萨德奇S·J·L·里贝罗E·佩科拉罗E·M·纳斯希门托
Owner 艾利森电讯公司