Samsung Electronics Co., Ltd.

Jong Heo

Hyoun-Soo Kim

Se-Ho Park

Sun-Tae Jung

Sun-tae Jung

Dong-Chin Lee

Dong-wook Shin

Se-ho Park

Yong-Beom Shin

Hye-Sun Lee

Yong-beom Shin

There is provided alkaloid halogen-doped sulfide glasses for an optical amplifier and a fabricating method thereof. An alkaloid halogen-doped sulfide glass is formed of silica doped with a Ge&mdash;Ga&mdash;S three-component system, Pr , and an alkaloid halogen. To fabricate the alkaloid halogen-doped sulfide glass for an optical amplifier, silica doped with Ge, Ga, S, Pr , and an alkaloid halogen as a starting material is filled into a container. The container is sealed in a vacuum and the starting material in the container is fused by heating the container. The container is cooled and the starting material is sintered by heating the container at a glass transition temperature.

Alkali halide-doped sulfide glasses for optical amplifier and fabricating method thereof

An optical fiber for an optical amplifier, which contains dysprosium ion (Dy ) with an improved light amplification efficiency at the 1.31 &mgr;m band. The optical fiber includes a germanium-gallium-sulfide (Ge&mdash;Ga&mdash;S) glass, an alkali metal halide, and Dy as a rare earth element. In the optical fiber, the interaction of electrons of Dy and phonons in the glass lattice can be minimized, so that the multiphonon relaxation of Dy 0 from F and H to H is slowed down, and thus the fluorescence lifetime at 1.31 &mgr;m is elongated, further improving the fluorescence efficiency of the optical fiber.

Optical fiber for optical amplifier

An optical fiber used for an optical amplifier, is formed by doping glass with rare-earth ions. Both praseodymium ions (Pr ) and erbium ions (Er ) are used as the rare-earth ions, and the glass is a fluoride glass or a sulfide glass. The optical fiber can be used at wavelengths of both 1.3 &mgr;m and 1.55 &mgr;m. The light amplification efficiency of an optical amplifier made of the optical fiber can be improved compared to that of an optical amplifier formed of only Pr or only Er .

Optical fiber for light amplifier

An optical fiber for use in a light amplifier. The optical fiber is formed by doping a gerrnanium-gallium-sulfur (Ge&mdash;Ga&mdash;S) glass containing less sulfur than a GeS,&mdash;Ga,S,stoichiometric composition line with a rare earth element, and further contains 0.1&tilde;10 atomic % of a halogen element base on the Ge&mdash;Ga&mdash;S glass. By using optical fiber, clustering of praseodymium (Pr,) ions can be suppressed even when the concentration of added Pr,is high, thereby improving light amplification efficiency.

A Ge--Ga--S-based glass composition having light amplifying characteristics and an apparatus for optical communications using the glass composition are provided. The present invention includes a sulfur-poor Ge--Ga--S based host glass which includes less S than compositions on the composition line of GeS.sub.2 --G.sub.2 S.sub.3 on the ternary phase diagram of Ge--Ga--S, and a rare earth active material doped on the host glass for luminescence and light amplification. Ga of no more than about 10 mol % is included in the host glass. Also, Pr.sup.3+ ions are used as the rare earth active material. Furthermore, for stable vitrification and a blue shift of a short wavelength absorption band, a vitrification stabilizer such as Br and I is added to the host glass. Also, the present invention includes an apparatus for performing optical communications such as a light amplifier using optical fiber comprised of the glass composition including the S-poor Ge--Ga--S host glass which includes less S than a glass on a composition line of GeS.sub.2 --Ga.sub.2 S.sub.3 and the rare earth active material doped on the host glass for the light amplification.

Ge-Ga-S-based glass composition having light amplifying characteristic

A Ge--Ga--S-based glass composition for performing an optical amplification and an apparatus for optical communications using the same are provided. In the glass composition according to the present invention, an active material for performing luminescence and optical amplification operations is added to the Ge--Ga--S host glass and a transition metal ion moving the distribution of optical amplification gains is added in a range from 0.01 mole % to 0.2 mol %.

Growing community of inventors

Pohang, South Korea

Jong Heo