1,MPF Research,2019/1/26,2,Main Methods -Incoherent Family,Based on SBS Effect,Based on Modulated Single Laser,Based on TLS Array,Based on Mutli-Wavelength Fiber Laser,Based on Spectrally-Sliced Broadband Optical Source,Others,Our Research Interest,Based on Multi-Wavelength Fiber Laser,Works Reported,1、Continuously Tunable Microwave Photonic Filter Using a Multiwavelength Fiber Laser,西班牙：Javier Abreu-Afonso, Antonio Dez, Jose Luis Cruz, and Miguel V. Andrs,IEEE PTL, VOL. 24, NO. 23, DECEMBER 1, 2012,2019/1/26,5,Fig. 1. (a) Experimental configuration of the multiwavelength fiber laser. FRM: Faraday rotator mirror. WDM: wavelength division multiplexer. LD: pump laser diode. PC: polarization controller. (b) Emission spectrum of the laser when = 4 mm. (c) Wavelength spacing (solid lines) and number of laser lines (dashed lines) as a function of,2019/1/26,6,Fig. 3. Transfer function of the filter and the corresponding laser emission spectrum for (a) and (b) = 1.95 mm, and (c) and (d) = 1.61 mm. Solid lines are experimental results and dashed lines are theoretical calculations.,2019/1/26,7,几个关系式：,Fig. 4. (a) FSR as a function of the inverse of . Inset: central frequency of the first three bands as a function of distance . (b) 3-dB bandwidth of the passbands as a function of distance .,2019/1/26,8,2、Tunable Multi-Tap Bandpass Microwave Photonic Filter Using a Windowed Fabry-Prot Filter-Based Multi-Wavelength Tunable Laser,南洋理工大学，华中科技大学 Junqiang Zhou, Student Member, IEEE, Songnian Fu, Feng Luan, Member, IEEE, Jia Haur Wong, Student Member, IEEE, Sheel Aditya, Senior Member, IEEE, Perry Ping Shum, Senior Member, IEEE,and Kenneth Eng Kian Lee, Member, IEEE,JLT，VOL. 29, NO. 22, NOVEMBER 15, 2011,2019/1/26,9,主要仪器器件： PM: 12GHZ 美国EoSpace VNA: 40MHZ-40GHZ 日本Anritsu 37369C; PD: 12GHZ 美国Newfocus 1544,2019/1/26,10,Fig. 2. Optical spectra of (a) the ASE spectrum of the ring cavity without the use of windowed FP filter and (b) the laser output versus the pump current.,2019/1/26,11,Fig. 3. Optical and microwave spectra when the multi-wavelength laser had 40 lasing wavelengths. (a) Measured multi-wavelength laser output. (b) Measured filter response,2019/1/26,12,Fig. 4. Tuning of the filter response. (a) FWHM tuning by varying the number of wavelengths used, with a fixed wavelength spacing of 40 GHz, and (b) tuning of the passband center frequency by setting the wavelength spacing to 40, 70, and 110 GHz, respectively, with the number of wavelengths fixed at 25.,2019/1/26,13,3、A microwave photonic filter using a switchable multiple dual-wavelength erbium-doped fiber laser,南洋理工大学：G Ning, J Q Zhou, P Shum, S Aditya, Vincent Wong and Desmond Lim J. Opt. A: Pure Appl. Opt. 10 (2008) 085304,Figure 1. Schematic of the experimental setup. HNDSF represents high nonlinear dispersion shift fiber; PC represents polarization controller; EDFA represents erbium-doped fiber amplifier; PD represents photodetector; SMF represents single mode fiber.,2019/1/26,14,2019/1/26,15,Figure 2. (a) Multiple dual-wavelength laser when the output power of EDFA is 20 dB m. (b) Corresponding measured multi-tap filter response when the output power of EDFA is 20 dB m. (c) Multiple dual-wavelength laser after tuning when the output power of the EDFA is 20 dB m. (d) Corresponding measured filter response after tuning when the output power of EDFA is 20 dB m.,Figure 3. (a) Multiple dual-wavelength laser when the output power of EDFA is 28 dB m.(b) Corresponding measured filter response when the output power of the EDFA is 28 dB m. (c) Multiple dual-wavelength laser after tuning when the output power of the EDFA is 28 dB m. (d) Corresponding measured filter response after tuning when the output power of the EDFA is 28 dB m.,Figure 4. (a) Switched normal multiple wavelength laser spectrum with a span of 60 nm. (b) Corresponding measured filter response for resultant normal multiple wavelength. (c) Switched normal multiple wavelength laser spectrum after tuning with a span of 50 nm. (d) Measured filter response after tuning for resultant normal multiple wavelength.,4、Reconfigurable Microwave Photonic Filter Using Multiwavelength Erbium-Doped Fiber Laser 香港理工大学：Xinhuan Feng, C. Lu, Member, IEEE, H.Y. Tam, Senior Member, IEEE, and P. K. A. Wai, Senior Member, IEEE,IEEE PTL，VOL. 19, NO. 17, SEPTEMBER 1, 2007,Fig. 2. (a) Experimental (solid line) and simulated (dashed line) filter response and (b) corresponding output spectrum of the EDFL,Fig. 3. Reconfiguration of the filter. (a) Q-factor adjustment: Q 9 (solid line) and Q 25 (dashed line); (b) frequency tuning: f 2.988 GHz (solid line) and f 2.638 GHz (dashed line).,5、Tunable photonic microwave filter using semiconductor fibre laser L.R. Chen and V. Page,加拿大麦吉尔大学：Photonic Systems Group, Department of Electrical and Computer Engineering, McGill University, Montreal,QC, Canada H3A 2A7,ELECTRONICS LETTERS 13th October 2005 Vol. 41 No. 21,Fig. 1 Schematic of tunable photon