Samsung Electronics Co., Ltd.

Yong-Beom Shin

Hyoun-Soo Kim

Jong Heo

Se-Ho Park

Sun-Tae Jung

Sun-tae Jung

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 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.

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Pohang, South Korea

Yong-Beom Shin