A cascaded microwave photonic filter based on a low-coherence infinite-impulse-response filter

Abstract

A cascaded filter combining active and passive filters is proposed. The active filter acts as a low-coherence infinite-impulse-response (IIR) filter and achieves a sharp frequency response. The low-coherence IIR filter is realized by employing the cross-gain modulation (XGM) of the amplified spontaneous emission (ASE) spectrum of the semiconductor optical amplifier (SOA). The passive filter is an n-section unbalance Mach-Zehnder (UMZ) structure, which is used to increase free spectral range (FSR) and Q factor further. The low-coherence IIR filter cascaded with one section of UMZ passive filter is experimentally demonstrated, and a Q factor of 1268 is obtained.

Keywords

Semiconductor Optical Ampli / Amplify Spontaneous Emis / Free Spectral Range / Active Filter / Measured Frequency Response

References

[1] CapmanyJ, OrtegaB, PastorD. J. Lightw. Technol., 2006, 24: 201

[2] MinasianR A. IEEE Trans. Microw. Theory Technol., 2006, 54: 832

[3] JinS-c, ZhangA-l. Optoelectronics Letters, 2011, 7: 113

[4] WuX-j, ZhangA-l. Optoelectronics Letters, 2012, 8: 340

[5] VidalB, MengualT, Ibáñez-LópezC, MartiJ. IEEE Photon. Technol. Lett., 2006, 18: 2272

[6] YiX, HuangT X H, MinasianR A. IEEE Trans. Microw. Theory Technol., 2010, 58: 3088

[7] OuH, ZhuK, YeC, HuY. IEEE Photon. Technol. Lett., 2011, 23: 938

[8] ChangJ, DengY, FokM P, MeisterJ, PrucnalP R. Applied Optics, 2012, 51: 4265

[9] HunterD B, MinasianR A. IEEE Trans. Microw. Theory Technol., 1997, 45: 1463

[10] PulikkaserilC, ChanE H W, MinasianR A. J. Lightw. Technol., 2010, 28: 262

[11] ChanE H W, MinasianR A. Electron. Lett., 2011, 47: 113

[12] PulikkaserilC, ChanE H W, MinasianR A. Microwave and Optical Technology Letters, 2011, 53: 1284

[13] CapmanyJ, LightwJ. Technol., 2006, 24: 2564

[14] YouN, MinasianR A. IEEE Trans. Microw. Theory Technol., 1999, 47: 1304

[15] YouN, MinasianR A. Electron. Lett., 1999, 35: 2125

[16] XuE, ZhangX, ZhouL, ZhangY, YuY, LiX, HuangD. J. Lightw. Technol., 2010, 28: 2358