Tunable microwave photon band pass filter based on multi-wavelength fiber laser
A fiber laser and band-pass filter technology, which is applied in the coupling of optical waveguides, instruments, optics, etc., can solve the problems of multi-system noise, high cost, and reduced filter performance, and achieve band-pass filtering with low cost , the effect of large side lobe suppression ratio
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[0018] This highly tunable microwave photonic bandpass filter structure includes: 980nm or 1480nm pump source 1, wavelength division multiplexer 2, erbium-doped fiber 3, polarization controller-4, polarization-dependent isolator 5, polarization control Polarization controller two 6, polarization controller three 8 and polarization controller four 12, polarization maintaining fiber one 7, polarization maintaining fiber two 9 and polarization maintaining fiber three 13, common single-mode fiber one 10 and common single-mode fiber two 17, coupler One 11, coupler two 14, phase modulator 15 and photodetector 16.
[0019] A pump source 1 with a center wavelength of 980nm or 1480nm is connected to port a of the wavelength division multiplexer 2; port c of the wavelength division multiplexer 2 is connected to the input end of the erbium-doped fiber 3; the output end of the erbium-doped fiber 3 is connected to the polarization controller The input end of one 4; the output end of the po...
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