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Design of Rare-Earth-Doped Microspheres

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6 Author(s)
Mescia, L. ; DEE, Politec. di Bari, Bari, Italy ; Prudenzano, F. ; De Sario, M. ; Palmisano, T.
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Two original computer codes for the design of rare-earth-doped dielectric microspheres have been ad hoc developed. The former code is based on a finite-difference time-domain algorithm, suitably extended to model the amplification of the whispering-gallery modes propagating into rare-earth-doped microspheres. It takes into account the wavelength dispersion of the microsphere refractive index and the polarization obtained via the density matrix model. The design of an Er3+-doped silica microsphere coupled with a tapered silica fiber is reported. The latter home-made computer code solves the rate equations and the power propagation equations in frequency domain. The results are in excellent agreement.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 6 )