Germanate glass core fiber

Higly Ge-doped silica fibers are used for variety of nonlinear applications.

Typical loss spectrum


High germania core fiber


Core diameter, µm8 x 7 (elliptical)
Clading diameter, µm125 ± 1
Coating diameter, µm260 ± 10
Delta n0.14
GeO2 concentration, %98
Cutoff wavelength, µm~ 0.7
Attenuation (at 1550nm), dB/km200
Attenuation (at 2100nm), dB/km110
Attenuation (at 2300nm), dB/km200
Splicing loss with ordinary fiber, dB~ 1
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