Analysis of tapered mode transformers for semiconductor optical amplifiers
Identifieur interne : 00D819 ( Main/Exploration ); précédent : 00D818; suivant : 00D820Analysis of tapered mode transformers for semiconductor optical amplifiers
Auteurs : C. Vassalo [France]Source :
- Optical and quantum electronics [ 0306-8919 ] ; 1994.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Numerical data are presented on the operation of field transformers consisting of down-tapered rectangular waveguides. The propagation is analysed through a classical finite difference 3-D BPM method. A new adiabacity criterion is proposed. Adiabatic and nonadiabatic (linear or exponential) tapers are investigated, allowing one to increase the field radius from 0.5 to 1.5 or 2 μm at λ=1.5 μm, with a coupling loss to a Gaussian beam from 0.1 to 1 dB. For a given overall length, the more efficient field expansion (but also the larger coupling loss) is obtained with an adiabatic design.
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