Na LIU, Li FAN, Guangqiong XIA, Zhengmao WU. Broadband Tunable Microwave Frequency Comb Generation Based on Modulated Optical Injection Semiconductor Laser[J]. Acta Photonica Sinica, 2022, 51(6): 0614002

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- Acta Photonica Sinica
- Vol. 51, Issue 6, 0614002 (2022)

Fig. 1. Experimental setup for generating tunable broadband MFC

Fig. 2. Experimentally measured power-current curves and relaxation oscillation frequencies as a function of bias current for free-running DFB-SL1 and DFB-SL2,respectively

Fig. 3. Optical spectra(left column)and power spectra(right column)output from DFB-SL1,PM and DFB-SL2. The gray curves in power spectra denote the noise floor,and the resolution bandwidth(RBW)of ESA is 100 kHz

Fig. 4. SSB phase noise curves for fmod(red curves),13fmod(blue curves)and 22fmod(black curves)come lines,and SSB phase noises at 10 kHz frequency offset of representative fmod,4fmod,7fmod,10fmod,13fmod,16fmod,19fmod and 22fmod comb lines

Fig. 5. Optical spectra(left column)and power spectra(right column)output from DFB-SL2 with different Δf

Fig. 6. Bandwidth as a function of frequency detuning Δf

Fig. 7. Bandwidth as a function of injection power Pinj

Fig. 8. Power spectra of generated MFCs under different fmod

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