| 简介 |
A rare-earth doped optical fiber that includes a core and one or more clad layers surrounding the core, in which the core has a rare earth dopant, and a relationship of Equation (1) is satisfied :
0
<
∫
r
0
r
c
D
(
r
)
·
P
p
2
(
r
)
·
P
s
2
(
r
)
r
r
∫
r
0
r
c
D
(
r
)
·
P
p
2
(
r
)
r
r
≤
0.35
(
1
)
where Pp(r) represents an electric field distribution in an exciting wavelength, Ps(r) represents an electric field distribution in wavelengths of spontaneous emission and/or stimulated emission carried in the core, D(r) (mass %) represents a rare-earth dopant distribution, ro represents a core center, and rc represents a core diameter. |
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