초록 ▼

An optical amplifying glass comprising 100 parts by mass of a matrix glass and from 0.1 to 10 parts by mass of Er doped to the matrix glass, wherein the matrix glass comprises Bi 2 O 3 , at least one of B 2 O 3 and SiO 2 , at least one member selected from the group consisting of Ga 2 O 3 , W

An optical amplifying glass comprising 100 parts by mass of a matrix glass and from 0.1 to 10 parts by mass of Er doped to the matrix glass, wherein the matrix glass comprises Bi 2 O 3 , at least one of B 2 O 3 and SiO 2 , at least one member selected from the group consisting of Ga 2 O 3 , WO 3 and TeO 2 , and La 2 O 3 in such a ratio that Bi 2 O 3 is from 20 to 80 mol %, B 2 O 3 +SiO 2 is from 5 to 75 mol %, Ga 2 O 3 +WO 3 +TeO 2 is from 0.1 to 35 mol %, and La 2 O 3 is from 0.01 to 15 mol %.

대표청구항 ▼

1. An optical amplifying glass comprising 100 parts by mass of a matrix glass and from 0.1 to 10 parts by mass of Er doped to the matrix glass, wherein the matrix glass comprises Bi 2 O 3 , at least one of B 2 O 3 and SiO 2 , at least one member selected from the group consisting of Ga 2 O 3

1. An optical amplifying glass comprising 100 parts by mass of a matrix glass and from 0.1 to 10 parts by mass of Er doped to the matrix glass, wherein the matrix glass comprises Bi 2 O 3 , at least one of B 2 O 3 and SiO 2 , at least one member selected from the group consisting of Ga 2 O 3 , WO 3 and TeO 2 , and La 2 O 3 in such a ratio that Bi 2 O 3 is from 20 to 80 mol %, B 2 O 3 +SiO 2 is from 5 to 75 mol %, Ga 2 O 3 +WO 3 +TeO 2 is from 0.1 to 35 mol %, and La 2 O 3 is from 0.01 to 15 mol %. 2. The optical amplifying glass according to claim 1, wherein the matrix glass consists essentially of, as represented by mol % based on the following oxides: 2 O 3 2 O 3 2 2 O 3 3 2 2 O 3 2 O 3 2 2 2 2 3. The optical amplifying glass according to claim 1, wherein the content of La 2 O 3 in the matrix glass is from 0.5 to 4 mol %. 4. The optical amplifying glass according to claim 1, wherein Er is doped in a proportion of from 1 to 3 parts by mass per 100 parts by mass of the matrix glass. 5. The optical amplifying glass according to claim 1, wherein Er is doped in a proportion of less than 1 part by mass per 100 parts by mass of the matrix glass. 6. An optical waveguide comprising the optical amplifying glass as defined in claim 1, as the core. 7. The optical waveguide according to claim 6, which has a gain of at least 8 dB for a light having a wavelength of from 1,530 nm to 1,560 nm and an intensity of 0.1 mW, when the length of the optical waveguide is 5 cm. 8. The optical waveguide according to claim 6, which has a 3-dB down bandwidth of at least 55 nm for a light having an intensity of 1 mW within a wavelength region of from 1,530 to 1,620 nm and which has a conversion efficiency of at least 10% for a light having a wavelength of 1,600 nm. 9. The optical waveguide according to claim 6, which has a gain of at least 10 dB for a light having a wavelength of 1,620 nm and an intensity of 1 mW, and which has a conversion efficiency of at least 10% for a light having a wavelength of 1600 nm.