Glass compositions having low energy phonon spectra and light so

Details Glass compositions having low energy phonon spectra and light so Glass compositions having low energy phonon spectra and light so

1993-08-06

1995-01-03

Bell, Mark L.

Optical: systems and elements

Optical amplifier

Optical fiber

501 37, 501 40, 257 13, 359343, 372 6, 372 40, H01S 317

Patent

active

053791495

ABSTRACT:
Embodiments of the present invention are sulfur rich glass compositions comprising germanium, gallium and sulfur, which glass compositions have a low energy phonon spectrum and which glass compositions serve as a host for active materials in fabricating light sources such as fiber laser oscillators, light amplifiers, and superluminescent sources. In particular, such a laser oscillator, light amplifier or superluminescent source is comprised of an inventive glass composition which is doped with rare earth ions such as Pr.sup.3+ or Dy.sup.3+ for producing light output at wavelengths, among others, substantially at 1.3 um. Further embodiments of the present invention are light sources such as laser oscillators, light amplifiers and superluminescent sources which have emissions substantially at 1.3 um and which are comprised of an inventive glass composition which is doped with Dy.sup.3+ and Yb3+ ions, wherein Dy.sup.3+ ions are pumped by energy transfer from Yb3+ ions. Still further embodiments of the present invention are laser oscillators, light amplifiers and superluminescent sources emitting radiation in a wavelength region substantially at 1.3 um which comprise low phonon energy glasses or crystals doped with Dy.sup.3+ .

REFERENCES:
patent: 4962995 (1990-10-01), Andrews et al.
patent: 5032315 (1991-07-01), Hayden et al.
patent: 5244846 (1993-09-01), Onishi et al.
"Systeme GeS.sub.2 -Ga.sub.2 S.sub.3 Diagramme de Phases Ohtention et Properties des Verres" by A. M. Looireau-Lozac'h et al., Ann. Chim, 10 (1975) 101-104 (No Month).
"Study on Ge-Ga-X (X=S,Se) Glass Systems" by M. Xilai et al., Proc. 14th Int. Congr. on Glass, Natl, Ind. Cer. Soc., Calcutta, 1986, pp. 118-127 (No Month).

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