Method of making a planar optical amplifier
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United States of America Patent
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Apr 6, 1993
Issued Date -
N/A
app pub date -
Dec 4, 1991
filing date -
Apr 25, 1991
priority date (Note) -
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Abstract
An active optical device comprises a glass, waveguiding structure disposed on a substantially planar principal surface of a substrate. The structure includes a silica-based, erbium-doped active core. The active core has an erbium-to-silicon atomic ratio of at least about 0.01, an absolute erbium concentration of at least about 1.4.times.10.sup.20 atoms per cubic centimeter, and a radiative lifetime of the erbium lasing level of at least about 7 milliseconds. Also disclosed is a method for forming an active optical device, including the step of depositing an erbium-doped active core by sputtering.
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