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Fiber DFB lasers with ultimate efficiency

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3 Author(s)
Yelen, K. ; Optoelectronics Res. Centre, Univ. of Southampton, UK ; Zervas, M.N. ; Hickey, L.M.B.

A novel method for designing distributed feedback (DFB) lasers with ultimate efficiency is presented. The method is based on the calculation of the optimum signal distribution for a given pumping scheme and derivation of the grating profile that sustains this distribution so that at every point in the cavity pump-to-signal conversion efficiency is maximum. Theory applied experimentally in Er-Yb co-doped fiber resulting in a 57% increase in the efficiency with 10% shorter device length compared with standard optimized co-pumped designs.

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Lightwave Technology, Journal of  (Volume:23 ,  Issue: 1 )