Ultrafast optical thresholding based on two-photon absorption GaAs waveguide photodetectors

被引：57

作者：

Zheng, Z ^{[1
]}

Weiner, AM ^{[1
]}

Marsh, JH ^{[1
]}

Karkhanehchi, MM ^{[1
]}

机构：

[1] UNIV GLASGOW,DEPT ELECT & ELECT ENGN,GLASGOW G12 8QQ,LANARK,SCOTLAND

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 1997年 / 9卷 / 04期

关键词：

code division multiaccess; nonlinear optics; optical pulse shaping; photodetectors; semiconductor waveguides; threshold decoding; two-photon absorption; ultrafast optics;

D O I：

10.1109/68.559399

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：

We report measurements of the pulsewidth dependence of the two-photon absorption photocurrent in GaAs p-i-n waveguide photodetectors using subpicosecond optical pulses at 1.5 mu m. For fixed pulse energy, the photocurrent is observed to depend linearly on the inverse of the optical pulsewidth, A subnanosecond electrical response is also observed, Our results show the feasibility of applying such devices for nonlinear processing in ultrafast optical code-division multiple-access and other ultra high-speed optical network applications.

引用

页码：493 / 495

页数：3

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