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

Details Ge-Ga-S-based glass composition having light amplifying characte Ge-Ga-S-based glass composition having light amplifying characte

1998-11-04

2000-11-14

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Input/output coupler

385122, 385144, 385123, 359341, 501 37, G02B 626

Patent

active

061481254

ABSTRACT:
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.

REFERENCES:
patent: Re36513 (2000-01-01), Aitken et al.
patent: 5379149 (1995-01-01), Snitzer et al.
patent: 5764661 (1998-06-01), Tawarayama et al.
patent: 5973824 (1999-10-01), Sanghera et al.
patent: 5991486 (1999-11-01), Braglia

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