Abstract
We demonstrate a multi-wavelength erbium-doped fiber laser (EDFL) using
erbium gain and four-wave mixing (FWM) effect in a piece of erbium-doped fiber (EDF)
with high erbium ion concentration. The EDF has a pump absorption rate of 24.6 dB/m
at 979 nm and is bi-directionally pumped by 980-nm laser diodes. FWM effect
redistributes the energy of different oscillating lines and causes multi-wavelength
operation. The laser generates more than 22 lines of optical comb with a line
spacing of approximately 0.10 nm at the 1569-nm region using only 1.5-m-long EDF.
© 2011 Chinese Optics Letters
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