All-Optical Microwave Filter With High Frequency Selectivity Based on Semiconductor Optical Amplifier and Optical Filter

Author

Xu, Enming ; Zhang, Xinliang ; Zhou, Lina ; Zhang, Yu ; Yu, Yuan ; Li, Xiang ; Huang, Dexiu

Author_Institution

Wuhan Nat. Lab. for Optoelectron., Huazhong Univ. of Sci. & Technol., Wuhan, China

Volume

28

Issue

16

fYear

2010

Firstpage

2358

Lastpage

2365

Abstract

We propose and experimentally demonstrate a novel all-optical microwave filter with high frequency selectivity. It is based on a recirculating delay line (RDL) loop in which a semiconductor optical amplifier (SOA) is followed by a tunable narrowband optical filter and a 1 × 2 10:90 optical coupler. Converted signal used as a negative tap is generated through wavelength conversion employing the cross-gain modulation (XGM) of the amplified spontaneous emission (ASE) spectrum of the SOA. The converted signal circulating in the RDL loop can realize a high quality factor (Q) response after photo-detection. The 1 × 2 10:90 coupler is employed to extract 10% optical power from the loop as output. A frequency response with a high Q factor of 543, a rejection ratio of 40 dB and a shape factor of 15.4 is experimentally demonstrated.

Keywords

Q-factor; microwave filters; optical couplers; optical filters; semiconductor optical amplifiers; superradiance; ASE spectrum; RDL; SOA; XGM; all-optical microwave filter; amplified spontaneous emission; cross-gain modulation; high Q factor; optical coupler; photo-detection; quality factor; recirculating delay line loop; semiconductor optical amplifier; tunable narrowband optical filter; Microwave photonics; microwave filter; optical signal processing; semiconductor optical amplifier;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2010.2045102

Filename

5438753