Frontiers of Optoelectronics, Volume. 2, Issue 4, 403(2009)
All-optical filter for simultaneous implementation of microwave bandpass and notch responses based on semiconductor optical amplifier
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.
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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
Received: Jul. 30, 2009
Accepted: Aug. 10, 2009
Published Online: Oct. 8, 2012
The Author Email: ZHANG Xinliang (xlzhang@mail.hust.edu.cn)