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

Rajan Jose; Guanshi Qin; Yusuke Arai; Takenobu Suzuki; Yasutake Ohishi

doi:10.1117/12.780950

22 April 2008 Gain flattened fiber Raman amplifiers by tailoring raman amplification bandwidth of tellurite glasses

Rajan Jose, Guanshi Qin, Yusuke Arai, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 6998, Solid State Lasers and Amplifiers III; 69981K (2008) https://doi.org/10.1117/12.780950
Event: SPIE Photonics Europe, 2008, Strasbourg, France

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.

Citation Download Citation

Rajan Jose, Guanshi Qin, Yusuke Arai, Takenobu Suzuki, and Yasutake Ohishi "Gain flattened fiber Raman amplifiers by tailoring raman amplification bandwidth of tellurite glasses", Proc. SPIE 6998, Solid State Lasers and Amplifiers III, 69981K (22 April 2008); https://doi.org/10.1117/12.780950

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