A simple procedure to determine the complex permittivity of materials without ambiguity from reflection measurements
✍ Scribed by J. M. Catalá-Civera; F. Peñaranda-Foix; D. Sánchez-Hernández; E. De los Reyes
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 267 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
output power is lower, as predicted by both approaches. When the reflectivity is small, the oscillation energy is small. Thus, the lasing wavelength has a lower number of photons available for feedback and energy accumulation. At higher reflectivities, although the energy within the cavity is large, the amount of power extracted from the system is limited. Thus, again, the system exhibits lower output powers for such a case.
Conclusions
The homogeneous, two-level approximation of amplification in erbium-doped fibers is the basis for many amplifier and fiber laser models. In this paper, the numerical method for modeling the laser oscillation has been described. From the comparison of numerical results with experimental measurements, it is found that the model is able to predict the cavity behavior in steady state accurately, with less than 10% deviation. The model also clearly depicted the lasing mode selection process in the ring cavity during the transient period.