Frontiers of Optoelectronics, 2009, 2 (4): 403, 网络出版: 2012-10-08
All-optical filter for simultaneous implementation of microwave bandpass and notch responses based on semiconductor optical amplifier
All-optical filter for simultaneous implementation of microwave bandpass and notch responses based on semiconductor optical amplifier
microwave photonic microwave filters optical signal processing semiconductor optical amplifier cross-gain modulation amplified spontaneous emission
摘要
Abstract
An all-optical filter structure to simultaneously implement microwave bandpass and notch filter is proposed and experimentally demonstrated. The structure is based on a recirculating delay line (RDL) loop consisting of a semiconductor optical amplifier (SOA) followed by a tunable narrowband optical filter and a 10∶90 coupler. The converted signal is generated in a wavelength conversion process based on cross-gain modulation of amplified spontaneous emission in the SOA. The converted signal circulating in RDL loop realizes a negative bandpass response. The negative bandpass filter and a broadband allpass filter are synthesized to achieve a notch filter with flat passband which can excise interference with minimal impact on the wanted signal.
Enming XU, Xinliang ZHANG, Lina ZHOU, Yu ZHANG, Yuan YU, Fei WANG, Dexiu HUANG. All-optical filter for simultaneous implementation of microwave bandpass and notch responses based on semiconductor optical amplifier[J]. Frontiers of Optoelectronics, 2009, 2(4): 403. Enming XU, Xinliang ZHANG, Lina ZHOU, Yu ZHANG, Yuan YU, Fei WANG, Dexiu HUANG. All-optical filter for simultaneous implementation of microwave bandpass and notch responses based on semiconductor optical amplifier[J]. Frontiers of Optoelectronics, 2009, 2(4): 403.