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By an improved optimization of the grating profile, an asymmetric three phase-shift (3PS) distributed feedback (DFB) laser structure is shown to achieve stable single mode oscillation up to high current injection levels. The analysis of those structures enhances the possibility of attaining high mode selectivity whilst ensuring almost flat profiles for the intracavity field distribution. The transfer...
The development of stable single frequency fiber laser requires the use of short cavity length and therefore high gain per unit length medium. Tellurite glasses possess the suitable properties to realize such a device that would operate in the 2 mum wavelength region. Amongst those properties are low phonon energy and high rare earth ion solubility. The optical and thermo-mechanical properties of...
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