Optically Synchronized Oscillators for Low Phase Noise Microwave and RF Frequency Distribution

Various circuits dedicated tohigh spectral purity signal transmission using fiber optics are presented. Three application types are investigated : reference frequency distribution at 10 MHz, IF distribution at 800 MHz and microwave synthesized signals at 3.5 GHz. The reception circuit is an optically synchronized oscillator, which provides a good signal conditioning far from the carrier while maintaining the high input signal quality close to the carrier.