Resumo -Este artigo de Iniciação Científica descreve a montagem e testes de um laser baseado em uma cavidade em figura-de-oito operando no regime de modo travado passivo (passive mode-locking). O dispositivo é formado por um anel de fibra óptica monomodo contendo um amplificador óptico semicondutor (SOA -Semiconductor Optical Amplifier) como meio de ganho. Obteve-se travamento dos modos longitudinais (Mode-Locking) com taxa de repetição dos pulsos na frequência fundamental e harmônicas, todas em MHz (Harmonic Mode-Locking). Palavras-Chave-laser em anel de fibra óptica; amplificador óptico semicondutor; harmonic mode-locking; figura-de-oito.Abstract -This paper of Scientific Initiation describes the assembly and testing of a mode-locked laser operating on passive mode in a figure-of-eight cavity. The laser is composed by a single-mode fiber optic ring containing an SOA as medium of gain. Mode-Locking was obtained with MHz repetition rate of the fundamental and harmonic frequencies (Harmonic Mode-Locking).
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