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Proceedings Paper

Gain flattened fiber raman amplifiers by tailoring Raman amplification bandwidth of tellurite glasses
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Paper Abstract

Raman spectral bandwidths of tellurite glasses are widened by using Raman active components of suitable concentration in appropriate base glasses. The MoO6 octahedra were found to have high octahedral distortion; therefore, have high Raman polarizability compared to WO6, NbO6, and TaO6 octahedra and PO4 tetrahedra. This high Raman polarizability enabled broadening of the spectral width up to ~350 cm-1 while maintaining high Raman scattering intensities. Although similar bandwidths could be achieved using combined generation of WO6 octahedra and PO4 tetrahedra, the resultant Raman scattering intensity of such glasses is only half of that could be achievable using MoO6. It is shown that the simplest tellurite glass showing wide spectral broadening is a quaternary system comprising a network modifier (BaO or Bi2O3) and two Raman oscillators (NbO6 and MoO6 octahedra). Using the newly developed gain medium gain flattened S+ C+ L ultrabroadband fiber Raman amplifier are designed by solving the inverse amplifier design problem. The relative gain flatness and the effective bandwidth of new gain medium are better and larger than those of conventional tellurite fibers.

Paper Details

Date Published: 22 April 2008
PDF: 12 pages
Proc. SPIE 6998, Solid State Lasers and Amplifiers III, 69981K (22 April 2008); doi: 10.1117/12.780950
Show Author Affiliations
Rajan Jose, Toyota Technological Institute (Japan)
Guanshi Qin, Toyota Technological Institute (Japan)
Yusuke Arai, Toyota Technological Institute (Japan)
Takenobu Suzuki, Toyota Technological Institute (Japan)
Yasutake Ohishi, Toyota Technological Institute (Japan)

Published in SPIE Proceedings Vol. 6998:
Solid State Lasers and Amplifiers III
Jonathan A. Terry; Thomas Graf; Helena Jelínková, Editor(s)

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