Abstract
The
${\rm Yb}^{3+}/{\rm
Al}^{3+}$
co-doped silica glass is prepared using the powder
melting technology based on the high-frequency plasma furnace. The typical
absorption and emission pattern of
${\rm
Yb}^{3+}$
ions in the
${\rm
Yb}^{3+}/{\rm Al}^{3+}$
co-doped silica glass and photonic
crystal fiber (PCF) fabricated in our laboratory are demonstrated. The additional
absorption peak at 260 nm and the 200 nm-excited emission peak at 630 nm indicate
that the non-bridging oxygen hole centers (NBOHC) defects exist in the silica
glass. Moreover, the luminescence peak at 735 nm is also related to the NBOHC
defects. Spectral evolution of the NBOHC defects luminescence in relation
to the excitation wavelength, excitation power, and PCF length are also analyzed.
The laser slop efficiency of the PCF is 12.2%.
© 2013 IEEE
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