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Analysis of multiple wavelength DFB fiber lasers

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2 Author(s)
Lovseth, S.W. ; Dept. of Phys. Electron., Norwegian Univ. of Sci. & Technol., Trondheim, Norway ; Stepanov, D.Yu.

The behavior of multiwavelength distributed feedback fiber lasers is simulated in a comprehensive numerical model. Multiple fundamental modes can coexist, even though the coupling coefficients of their respective refractive index gratings are not equal, due to induced dynamic gain gratings. We have investigated the effect on the lasing state of variations in coupling strengths, gain parameters, grating Bragg frequency separation, relative phase between the gratings, length of the structure relative to the beat lengths between the gratings, grating center phase-shift errors, and saturation level of the UV-induced refractive index change

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Quantum Electronics, IEEE Journal of  (Volume:37 ,  Issue: 6 )