A Stable Phase-Coded Microwave Signal Generator Based on Cascaded Polarization Modulators

A novel phase-coded microwave signal generator based on two cascaded polarization modulators (PolMs) is proposed and demonstrated. One of the cascaded PolM together with an optical bandpass filter (OBPF) is used to convert a RF signal to a single-sideband (SSB) polarization-modulated optical signal, and the other PolM is used to control the phase of the RF signal according to an electrical coding signal. A phase-coded microwave signal with binary phase codes or polyphase codes is thus generated. An experiment is performed. The simple and flexible operation, high coding speed, large frequency range, excellent transmission performance and high stability of the system is confirmed.

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