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A novel scheme of microwave generation based on heterodyne phase locking of an optoelectronic oscillator (OEO) is proposed and demonstrated. The oscillation signal of a dual loop self-injection-locking OEO (DSILOEO) is mixed with a voltage controlled crystal oscillator (VCXO) and its up-converted output is phase-locked by a reference source to develop a heterodyne phase-locked-loop. The DSILOEO has...
Bias control of Mach-Zehnder electro-optic modulator is important for the performance of radio-over-fiber links. In this paper, a digital controller has been developed in order to keep the bias point at any target value, making the modulator exhibiting great long-term stability. Furthermore, this method was applied in radio-over-fiber links to optimize their performance, such as RF gain, noise figure,...
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