Abstract
The issue of widening the Raman spectral bandwidth of tellurite glasses while maintaining higher scattering intensity is addressed. Raman spectral bandwidths of tellurite glasses are widened by using a single Raman active component of suitable concentration in appropriate base glasses. It was observed that the octahedra, due to their high octahedral distortion, have high Raman polarizability compared to , , and octahedra and tetrahedra. This high Raman polarizability enabled broadening of the spectral width up to while maintaining high Raman scattering intensities. Although similar bandwidths could be achieved using the combined generation of octahedra and tetrahedra, the resultant Raman scattering intensity of such glasses is only half of that, which could be achievable using . It is shown that the simplest tellurite glass showing wide spectral broadening is a quaternary system comprising a network modifier ( or ) and two Raman oscillators ( and octahedra).
© 2008 Optical Society of America
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