Light-amplifying glass

A light amplification and glass technology, applied in optics, light guides, lasers, etc., can solve the problems of inability to obtain amplification and insufficient suppression, and achieve the effect of increasing the number of repetitions

Inactive Publication Date: 2011-09-28
ASAHI GLASS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, there may be a problem that when oscillating the pulsed laser, the number of repetitions of the oscillation cannot be increased sufficiently, and the influence of the induced Brillouin scattering that is enhanced in proportion to the fiber length cannot be sufficiently suppressed, so that a stable laser beam cannot be obtained. enlarge

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Embodiment Construction

[0043] In Table 1-3 by Bi 2 o 3 to CeO 2 The glass with the composition expressed in mol% in the column of is produced by the melting method of melting at 1150°C. In addition, the glass transition temperature Tg (unit: ° C), the relative luminous intensity E for a wavelength of 1064 nm, the luminous lifetime τ (unit: ms) for a wavelength of 1064 nm, and the absorption coefficient A (915) for a wavelength of 915 nm (unit: : dB / cm), the absorption coefficient A(940) (unit: dB / cm) for the wavelength of 940nm, the absorption coefficient A(p) (unit: dB / cm) for the peak of the wavelength of 940-990nm, for 915 The index of the flatness (flatness) of the absorption coefficient in the wavelength range of ~940 nm, that is, the ratio A' between the maximum value and the minimum value of the absorption coefficient is shown in the table.

[0044] Examples 1 to 20 are examples, and examples 21 and 22 are comparative examples. All of the glasses in Examples 1 to 20 have a Tg of 430° C. o...

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Abstract

Provided is a light-amplifying glass which absorbs more Yb3+. A light-amplifying glass contains, in mol% based on oxides, 30-55% of Bi2O3, 25-50% of SiO2 or B2O3 or both in total, 12-27% of Al2O3 or Ga2O3 or both in total, 0-4% of La2O3, and 0.1-4% of Yb2O3, does not substantially contain Er2O3, and is used for amplifying light having a wavelength of 1.0-1.2[mu]m. An optical waveguide having the light-amplifying glass as a core is also provided.

Description

technical field [0001] The present invention relates to light amplifying glass suitable for amplifying light having a wavelength of 1.0 to 1.2 μm. Background technique [0002] As a laser for processing, in recent years, development of a fiber laser made of Yb-doped fiber instead of a solid-state YAG laser has been progressing. The characteristics of fiber lasers are: the light transmission mode is limited, so the beam quality is good, and the heat dissipation is good due to the use of extremely thin fibers, and cooling is not required. [0003] However, the fiber to which Yb is added usually adopts the fiber based on quartz glass. However, the Yb that appears near 975nm in the single-mode fiber with quartz as the matrix and added with Yb 3+ The absorption is usually about 0.8 ~ 3.5dB / cm. In addition, Yb in the glass 3+ A sharp absorption peak appears around 975 nm, and other absorption peaks appear around 915 nm on the shorter wavelength side (refer to Non-Patent Docume...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/095C03C3/068C03C4/12C03C3/15G02B6/12G02B6/00C03C3/062G02B6/02
CPCC03C3/068H01S3/06716C03C3/15H01S3/176C03C3/062C03C13/048H01S3/1618C03C13/046H01S3/1693H01S3/1691
Inventor 大原盛辉近藤裕己
Owner ASAHI GLASS CO LTD
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