Abstract
In this paper, we present a new and compact structure for optical amplifiers
based on erbium-doped microfiber coil resonators (MCR). The performance of
the device is modeled by solving numerically the MCR coupled-mode equations
and the rate equations in the steady-state regime. Characteristics of amplifier
are analyzed for two-, three-, and four-turn MCRs. The signal gain spectrum
is studied in terms of amplifier length, signal wavelength, and signal, and
pump power. Simulation results demonstrate that such a device selectively
amplifies specific wavelengths due to its resonance nature. It is possible
to obtain optical gain as high as 30 dB using a 10 mW pump power and a 0.1 <i>μ</i>W signal power.
The amplified peaks show very narrow full-width at half-maximum that are very
promising for microlasers.
© 2012 IEEE
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