Er-doped optical fiber laser device
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United States of America Patent
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Aug 20, 1991
Grant Date -
N/A
app pub date -
Dec 19, 1989
filing date -
Dec 22, 1988
priority date (Note) -
Expired
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Abstract
An Er-doped optical fiber laser device adapted for pumping by light from a pumping light source in an erbium (Er)-doped optical fiber which enters a single mode at the wavelength of amplified light. In accordance with the present invention, the Er-doped optical fiber is further doped with at least one of holmium (Ho), thulium (Tm) and dysprosium (Dy). The pumping light source emits light in a 1.1 to 1.4 .mu.m band. The output light from the pumping light source and signal light incident to the Er-doped optical fiber are combined by a combining optical fiber coupler.
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