title: Reconfigurable multi-channel WDM drop module using a tunable wavelength-selective photodetector array.
abstract: An integrated reconfigurable four-channel wavelength-division-multiplexed drop module for use in the long-wavelength was demonstrated using a tunable wavelength-selective photodetector array. The array consists of an InP-based p-i-n absorption structure and a GaAs-based multistep Fabry-Pérot filtering cavity. The high quality GaAs/InP heteroepitaxy was realized by employing a thin low temperature buffer layer. The GaAs-based multistep cavity was fabricated by wet etching and regrowth. The dropped central wavelengths were 1538, 1550, 1559, and 1570nm. The tunable range reached 10nm with a tuning power efficiency of 14.2nm/W. A spectral linewidth less than 0.5nm (FWHM), a 3dB bandwidth of 9.2GHz, and the peak quantum efficiencies from 13% to 20% were simultaneously obtained, in agreement with the theoretical simulation.
authors.affiliation: Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications(BUPT), Key Laboratory of Information Photonics and Optical Communications (BUPT), Ministry of Education Beijing 100876, China. xiaofengduan@163.com
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Duan
authors.forename: Yongqing
authors.initials: Y
authors.lastname: Huang
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Ren
authors.forename: Hui
authors.initials: H
authors.lastname: Huang
authors.forename: Sanxian
authors.initials: S
authors.lastname: Xie
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.forename: Shiwei
authors.initials: S
authors.lastname: Cai
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D010783:Photometry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D018511:Systems Integration; D013685:Telecommunications / Q000295:instrumentation*; D014159:Transducers