Optical gain and laser generation in bismuth-doped silica fibers free of other dopants.
Luminescence emission and excitation spectra of bismuth-doped silica optical fibers free of other dopants have been obtained to construct an emission-excitation map in a wide wavelength range of 400-1600 nm. The main low-lying energy levels of the bismuth active centers in such fibers have been determined. For the first time (to our knowledge), optical gain and lasing have been obtained in such fibers. A gain of 8 dB has been achieved with a pump power of 340 mW, and a cw fiber laser emitting at 1460 nm with an output power of 40 mW and an efficiency of ≈3% has been created.
Fiber Optics Research Center, Russian Academy of Sciences, 38 Vavilov Street, 119333 Moscow, Russia. iabuf@fo.gpi.ru
Igor A
IA
Bufetov
Mikhail A
MA
Melkumov
Sergey V
SV
Firstov
Alexey V
AV
Shubin
Sergey L
SL
Semenov
Vladimir V
VV
Vel'miskin
Andrey E
AE
Levchenko
Elena G
EG
Firstova
Evgeny M
EM
Dianov