A variable coefficient microwave photonic filter based on multi-wavelength fiber laser and Mach-Zehnder interferometer

Abstract

A microwave photonic filter (MPF) with variable coefficient is proposed and demonstrated, which is constructed by a multi-wavelength fiber laser and Mach-Zehnder interferometer (MZI). Through changing the slope characteristics of Mach-Zehnder interference spectrum adjusted by optical variable delay line (OVDL), the conversion from phase modulation (PM) to intensity modulation (IM) is realized. The multi-wavelength fiber laser with Lyot-Sagnac optical filter has variable wavelength spacing. So the designed filter has a variable number of taps and tap weights. As a result, the tunable range of passband center frequency is 2.6 GHz. The reconfigurability of MPF can be also realized by adjusting the output of fiber laser.

Keywords

Fiber Laser / Single Mode Fiber / Radio Frequency Signal / Wavelength Spacing / IEEE Photonic Technology Letter

References

[1] WeiZ-h, WangR, FangT, PuT, SunG-d, ZhengJ-l. Journal of Optoelectronics ·Laser, 2013, 24: 1086

[2] ZhangC, YanL-s, PanW, LuoB, ZouX-h, JiangH-y, LuB, ZhouT. Journal of Optoelectronics·Laser, 2013, 24: 1662

[3] LiL, ThomasX H. Huang and Robert Minasian, IEEE Photonics Technology Letters, 2014, 26: 82

[4] FengX, LuC, TamH Y, WaiP K A. IEEE Photonics Technology Letters, 2007, 19: 1334

[5] FengX, TamH-y, WaiP K A. Optics Express, 2006, 14: 8205

[6] ZhouJ, FuS, LuanF, WongJ H, AdityaS, ShumP P, LeeK E K. Journal of Lightwave Technology, 2011, 29: 3381

[7] Abreu-AfonsoJ, DíezA, CruzJ L, AndrésM V. IEEE Photonics Technology Letters, 2012, 24: 2129

[8] JiangY, ShumP P, ZuP, ZhouJ, BaiG, XuJ, ZhouZ, LiH, WangS. IEEE Photonics Journal, 2013, 5: 5500509

[9] HuangT X H, YiX, MinasianR A. Optics Express, 2011, 19: 6231

[10] WangJ, ZengF, YaoJ. IEEE Photonics Technology Letter, 2005, 17: 2176

[11] ZengF, YaoJ. Journal of Lightwave Technology, 2005, 23: 1721

[12] HanY-G, KimG, LeeJ H, KimS H, LeeS B. IEEE Photonics Technology Letters, 2005, 17: 989