Influencia da temperatura sobre o guia de ondas de lasers do tipo poço quantico simples de GaAs

AUTOR(ES)
DATA DE PUBLICAÇÃO

1989

RESUMO

In this work the electro-optical characterization techniques were used in order to understand the anomalous emission behavior observed for Single Quantum Well lasers with active region thinner than 150Þ and 4.O mm stripe width. We observed lone delay time laser emission involving the first and second energy levels of the Quantum Well and an unexpected lower threshold current for the higher energy mode. This is shown to be due to the high internal device losses. We showed also, that depending on current, and in the case of normal delay time observed for the higher energy mode, the light confinement is provided by gain guiding mechanism. For the lower energy mode which shows only abnormally lone delays, the guiding mechanism is showed to be due to a thermally induced real index waveguide. Q - Switching effect was also observed for lasers with active region thinner than 100Þ and less than 5.0 mm stripe width

ASSUNTO(S)

lasers semicondutores

ACESSO AO ARTIGO

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