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Above-threshold mode discrimination in external reflector and phase-shifted DFB lasers

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2 Author(s)
Rabinovich, W.S. ; US Naval Res. Lab., Washington, DC, USA ; Feldman, B.J.

The longitudinal mode discrimination above threshold in both distributed feedback lasers with one external reflector and those with phase-shifted grating structures is studied. By numerically solving a pair of coupled mode equations, it is shown that when these types of lasers have nonsaturable index coupling, they lose their mode discrimination at powers only a few times the saturation power of the medium due to the effects of spatial hole burning

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Quantum Electronics, IEEE Journal of  (Volume:25 ,  Issue: 8 )