Er3+-Tm3+-Pr3+ triply-doped graphene-glass-graphene (GGG) nanosheet waveguide amplifier, which
is a promising candidate for integrated photonic devices, is modelled and numerically analyzed. The designed
waveguide is composed of a triply-doped tellurite glass core. The core is sandwiched between two graphene layers.
The rate and power propagation equations of a heterogeneous multi-level laser medium are set up and solved
numerically to study the effects of waveguide length and active ion concentrations on amplifier performance at five
different input signal wavelengths (1.310, 1.470, 1.530, 1.600 and 1.650 μm). The analytical results show that rareearth
ion dopant concentrations at an order of 1026 ion/m3, waveguide length at 0.1m and pump power at 100mW
can amplify 1.530 and 1.600 μm input signals with 1 μW power up to approximately 20.0 and 24.0 dB respectively.
Finite-difference time-domain (FDTD) simulation results show that mode field radius of GGG waveguide is smaller
than that of silicon waveguide. Consequently, GGG waveguide with the same pump and signal power and the
same gain-medium length can produce higher gain than silicon waveguide.
KHUSHIK Muhammad Hanif Ahmed Khan, JIANG Chun *(姜淳)
. Gain Properties of Triply-Doped Graphene-Insulator-Graphene Nanosheet Waveguide[J]. Journal of Shanghai Jiaotong University(Science), 2019
, 24(1)
: 7
-11
.
DOI: 10.1007/s12204-019-2035-0
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