Title :
Fiber DFB lasers with ultimate efficiency
Author :
Yelen, K. ; Zervas, M.N. ; Hickey, L.M.B.
Author_Institution :
Optoelectronics Res. Centre, Univ. of Southampton, UK
Abstract :
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.
Keywords :
diffraction gratings; distributed Bragg reflector lasers; erbium; fibre lasers; laser cavity resonators; optical pumping; ytterbium; DFB lasers; Er-Yb codoped fiber; distributed feedback laser; fiber lasers; grating profile; optimum signal distribution; pump-to-signal conversion efficiency; pumping scheme; Design methodology; Distributed feedback devices; Fiber lasers; Gratings; Laser feedback; Laser theory; Optical design; Optical fiber devices; Optical fiber theory; Pump lasers; Distributed feedback (DFB) lasers; erbium; optical fiber lasers; optical fiber theory; ytterbium;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2004.840037
