High non-linear optical fiber excited Brillouin scattering effect and amplitude ratio based microwave frequency measurement method and device
A high nonlinear optical fiber, microwave frequency measurement technology, applied in the field of microwave photonics, can solve problems such as the inability to meet measurement requirements
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[0024] Embodiment 1: the tunable laser is the TSL-510 tunable laser of Santec Company, and the wavelength range of the laser is 1510nm~1630nm; the coupler is a 5:5 coupler; the intensity modulator adopts a Mach-Zehnder modulator, and the bandwidth is 32GHz, the minimum operating point bias voltage measured before the experiment is 6.7V; the bandwidth of the phase modulator is 40GHz; the isolation of the optical isolator is greater than 40dB; the erbium-doped fiber amplifier is WZEDFA-SO-B-S-17-1-2; the default Constant power output 17dBm. YOFC’s highly nonlinear optical fiber has a length of 1km. When the optical carrier wavelength is 1550nm, under the same experimental conditions as the microwave frequency measurement experiment, the measured linewidth of the stimulated Brillouin gain spectrum is measured as ΔV B =100MHz, stimulated Brillouin frequency shift f B =9.2GHz; Agilent’s microwave signal generator E8257D, the output frequency range is 100kHz to 70GHz; the bandwidth...
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