[SCI] Gain Controlling of Erbium-doped Fiber Amplifier by Samarium Doped Inner-cladding in the 1.5μm Region
작성일 : 2021-02-22
작성자 : 김종오
Characteristics of a new type of erbium-doped Wber for optical ampliWers were
reported where erbium was doped in the center of the core and samarium doped in
a ring of the cladding. Using samarium absorption of photons around 1.5 ·m in the
erbium ion emission range, we demonstrated a new way of controlling the gain
spectrum of erbium-doped Wber ampliWer without using external Wlters. AmpliWer
small signal gain under saturation was about 11 dB and within 2.3 dB variation in the
range of 1520±1560 nm. Total output power from the ampliWer was 9 dBm with
100 mW of pump power at 980 nm. The eVects of samarium-doped inner cladding
on ampliWed spontaneous emission spectra in the long wavelength band were also
reported.