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Quantum cascade lasers with a tilted facet utilizing the inherent polarization purity.
Opt Express ; 22(21): 26294-301, 2014 Oct 20.
Article em En | MEDLINE | ID: mdl-25401662
We report on quantum cascade lasers (QCLs) with a tilted facet utilizing their polarization property. Contrary to diode lasers, QCLs generate purely TM polarized light due to the intersubband selection rules. This property enables the utilization of reflectivity in terms of only TM polarized light (TM reflectivity). The TM reflectivity is reduced by tilting the front facet, resulting in enhanced light output power from the tilted facet. The peak output power of a QCL with a facet angle of 12° are increased by 31 %. The slope efficiency of a QCL with a facet angle of 17° are increased by 43 %. Additionally, a peculiar property of TM reflectivity, the Brewster angle, is investigated by using COMSOL simulations to find its availability in QCLs.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Espectrofotometria Infravermelho / Técnicas de Química Analítica / Lasers Semicondutores / Luz Idioma: En Ano de publicação: 2014 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Espectrofotometria Infravermelho / Técnicas de Química Analítica / Lasers Semicondutores / Luz Idioma: En Ano de publicação: 2014 Tipo de documento: Article