Theory and experiments of a tunable wavelength-selective photodetector based on a taper cavity

被引：24

作者：

Huang, Hui ^{[1
]}

Ren, Xiaomin ^{[1
]}

Wang, Xingyan ^{[1
]}

Cui, Hailin ^{[1
]}

Wang, Wenjuan ^{[1
]}

Miao, Ang ^{[1
]}

Li, Yiqun ^{[1
]}

Wang, Qi ^{[1
]}

Huang, Yongqing ^{[1
]}

机构：

[1] Beijing Univ Posts & Telecommun, Sch Telecommun Engn, Opt Commun Ctr, Beijing 100876, Peoples R China

来源：

APPLIED OPTICS | 2006年 / 45卷 / 33期

关键词：

D O I：

10.1364/AO.45.008448

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a wavelength-selective photodetector that combines a Fabry-Perot filtering cavity (FPC) with a taper absorption cavity (TAC). The taper cavity shows a nonresonant effect but exhibits an absorption enhancement effect, so that high speed, high quantum efficiency, wide tuning range, and an ultranarrow spectral linewidth can be achieved simultaneously. Device performance was theoretically investigated by including key factors such as taper angle, finite-size diffracting-beam input, and lateral walk-off in the taper cavity. The device was fabricated by bonding a GaAs-based FPC, which can be tuned via thermal-optic effect, with an InP-based TAC. An integrated device with a spectral linewidth of 0.6 nm (FWHM), a wavelength tuning range of 10.2 nm (1518.0-1528.2 nm), a 3 dB bandwidth of 12 GHz, and a quantum efficiency of similar to 70% was demonstrated, and the absorption layer thickness is only 0.3 mu m. (c) 2006 Optical Society of America.

引用

页码：8448 / 8453

页数：6

共 20 条

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