Duan Xiaofeng, Huang Yongqing, Ren Xiaomin, Huang Hui, Xie Sanxian, Wang Qi, Cai Shiwei
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.
Opt Express. 2010 Mar 15;18(6):5879-89. doi: 10.1364/OE.18.005879.
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.
