Side-Mode Excitation in Single-Mode Laser Diodes

VANZI, MASSIMO;Xiao, K.;MARCELLO, GIULIA;MURA, GIOVANNA

2016-01-01

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Abstract

A double-peaked spectrum in some distributed feedback laser diodes is demonstrated to relate to axially confined catastrophic optical damage (COD), followed by the excitation of a transversal optical mode. The melting-regrowth kinetics of CODs also reveal another possibility of COD-induced side optical modes in a fiber distributed Bragg reflector pump laser diode. A third case completely reverses the cause-effect relationship between CODs and lateral optical harmonics.