Three-Level Nd3+ Luminescence Enhancement in All-Solid Silicate Glass Photonic Bandgap Fiber

We report a neodymium-doped all-solid silicate glass photonic bandgap fiber which enhances three-level laser transition
⁴
F
_3/2
-
⁴
I
_9/2
(890-940 nm) by suppressing the four-level laser transition
⁴
F
_3/2
-
⁴
I
_11/2
(1000-1100 nm) using the bandgap effect. The laser output was not obtained due to the low absorbed pump power, but our result provides a new method for a new wavelength band fiber laser.