Light-amplifying glass
View Patent ↗To provide a light-amplifying glass capable of increasing absorption of Yb 3+ . A light-amplifying glass to be used for amplifying light having a wavelength of 1.0 to 1.2 μm, which comprises, as represented by mol % based on the following oxides, from 30 to 55% of Bi 2 O 3 , from 25 to 50% of either one, or both in total, of SiO 2 and B 2 O 3 , from 12 to 27% of either one, or both in total, of Al 2 O 3 and Ga 2 O 3 , from 0 to 4% of La 2 O 3 and from 0.1 to 4% of Yb 2 O 3 and which contains substantially no Er 2 O 3 . An optical waveguide having such a light-amplifying glass as a core.
1. A light-amplifying glass to be used for amplifying light having a wavelength of 1.0 to 1.2 μm, which comprises, as represented by mol % based on the following oxides, from 30 to 55% of Bi 2 O 3 , from 25 to 50% of either one, or both in total, of SiO 2 and B 2 O 3 , from 12 to 27% of either one, or both in total, of Al 2 O 3 and Ga 2 O 3 , from 0 to 4% of La 2 O 3 and from 0.1 to 4% of Yb 2 O 3 and which contains substantially no Er 2 O 3 .
2. A light-amplifying glass which comprises, as represented by mol % based on the following oxides, from 30 to 55% of Bi 2 O 3 , from 25 to 50% of either one, or both in total, of SiO 2 and B 2 O 3 , from 12 to 27% of either one, or both in total, of Al 2 O 3 and Ga 2 O 3 , from 0 to 4% of La 2 O 3 and from 0.1 to 4% of Yb 2 O 3 and which contains substantially no Er 2 O 3 or Tm 2 O 3 .
3. The light-amplifying glass according to claim 2 , which is to be used for amplifying light having a wavelength of from 1.0 to 1.2 μm.
4. The light-amplifying glass according to claim 1 , wherein Bi 2 O 3 is from 35 to 50%, SiO 2 is from 0 to 45%, B 2 O 3 is from 0 to 35%, Al 2 O 3 is from 0 to 12% and Ga 2 O 3 is from 5 to 25%.
5. The light-amplifying glass according to claim 2 , wherein Bi 2 O 3 is from 35 to 50%, SiO 2 is from 0 to 45%, B 2 O 3 is from 0 to 35%, Al 2 O 3 is from 0 to 12% and Ga 2 O 3 is from 5 to 25%.
6. The light-amplifying glass according to claim 1 , wherein SiO 2 is at least 25% and B 2 O 3 is from 0 to 10%.
7. The light-amplifying glass according to claim 2 , wherein SiO 2 is at least 25% and B 2 O 3 is from 0 to 10%.
8. The light-amplifying glass according to claim 1 , which contains at most 1% of CeO 2 .
9. The light-amplifying glass according to claim 2 , which contains at most 1% of CeO 2 .
10. The light-amplifying glass according to claim 1 , which has an absorption coefficient of at least 1 dB/cm at a wavelength of 940 nm.
11. The light-amplifying glass according to claim 2 , which has an absorption coefficient of at least 1 dB/cm at a wavelength of 940 nm.
12. The light-amplifying glass according to claim 1 , which has an absorption coefficient of at least 4 dB/cm at a wavelength within a wavelength region of from 940 to 990 nm.
13. The light-amplifying glass according to claim 2 , which has an absorption coefficient of at least 4 dB/cm at a wavelength within a wavelength region of from 940 to 990 nm.
14. The light-amplifying glass according to claim 1 , which has a glass transition temperature of at least 400° C.
15. The light-amplifying glass according to claim 2 , which has a glass transition temperature of at least 400° C.
16. An optical waveguide having the light-amplifying glass as defined in claim 1 , as a core.
17. An optical waveguide having the light-amplifying glass as defined in claim 2 , as a core.
18. An optical fiber having the light-amplifying glass as defined in claim 1 , as a core.
19. An optical fiber having the light-amplifying glass as defined in claim 2 , as a core.