TIME-RESOLVED NONLINEAR ABSORPTION MODULATION IN GAAS/ALGAAS MULTIPLE-QUANTUM-WELL WAVE-GUIDES AT 1.06 MU-M

被引：4

作者：

LAUGHTON, FR ^{[1
]}

MARSH, JH ^{[1
]}

BUTTON, C ^{[1
]}

机构：

[1] UNIV SHEFFIELD,DEPT ELECTR & ELECT ENGN,SHEFFIELD S1 3JD,S YORKSHIRE,ENGLAND

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 1992年 / 4卷 / 08期

关键词：

D O I：

10.1109/68.149889

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Time-resolved nonlinear absorption modulation due to two-photon absorption (TPA) and free carrier absorption (FCA) is demonstrated in GaAs/AlGaAs waveguides at 1.06-mu-m. For a peak input intensity of 4.5 X 10(11) Wm-2, there was a maximum absorption modulation of 35%. This was caused by TPA, so that the recovery time was limited by the laser pulsewidth alone. At a peak input intensity of 1.5 X 10(12) Wm-2, a 65% absorption modulation was observed. This consisted of two components: an instantaneous effect due to TPA and also a slower component, attributed to FCA, whose recovery time was limited by the carrier lifetime. A theoretical model was also derived which provided a good fit to the experimental data.

引用

页码：863 / 866

页数：4

共 4 条

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