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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 33 — Nov. 20, 2006
  • pp: 8448–8453

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

Hui Huang, Xiaomin Ren, Xingyan Wang, Hailin Cui, Wenjuan Wang, Ang Miao, Yiqun Li, Qi Wang, and Yongqing Huang  »View Author Affiliations


Applied Optics, Vol. 45, Issue 33, pp. 8448-8453 (2006)
http://dx.doi.org/10.1364/AO.45.008448


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Abstract

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 70% was demonstrated, and the absorption layer thickness is only 0 .3   μm .

© 2006 Optical Society of America

OCIS Codes
(060.4080) Fiber optics and optical communications : Modulation
(230.5160) Optical devices : Photodetectors

History
Original Manuscript: May 12, 2006
Revised Manuscript: August 4, 2006
Manuscript Accepted: August 7, 2006

Citation
Hui Huang, Xiaomin Ren, Xingyan Wang, Hailin Cui, Wenjuan Wang, Ang Miao, Yiqun Li, Qi Wang, and Yongqing Huang, "Theory and experiments of a tunable wavelength-selective photodetector based on a taper cavity," Appl. Opt. 45, 8448-8453 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-33-8448

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