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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 4,
  • Issue 2,
  • pp. 66-68
  • (2006)

S+C band optical amplification in Er3+-Tm3+ co-doped fiber

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Abstract

A new type of optical amplifier based on co-doping erbium in thulium doped fiber is proposed to realize S+C band gain by dual-wavelength (800+1410 nm) pumping scheme which is obtainable from laser diode. A novel model is established for the co-doped fiber considering the Er<sup>3+</sup> to Tm<sup>3+</sup> energy transfer process. Using appropriate fiber parameters and energy transfer parameters, the coupled rate equations are analyzed and solved; the concentrations of Er<sup>3+</sup> and Tm<sup>3+</sup> and fiber length were optimized to get more uniform gain. The results predicted that the S+C band gain can be achieved at the same time by co-doping erbium in thulium doped fluoride fiber.

© 2005 Chinese Optics Letters

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