Optoelectronic Oscillator for Arbitrary Microwave Waveform Generation

An optoelectronic oscillator (OEO) for arbitrary microwave waveform generation based on Fourier domain mode-locking (FDML) is proposed. A reconfigurable optical generator (OWG) implemented via external electro-optical modulation, which serves as the source proposed OEO. The from OWG can be seen a series of frequency-scanning wavelengths in frequency domain. At any instant, number 0 to infinite. By setting period or its multiple equal cavity round-trip time, an FDML OEO by photonic filter (MPF) realized phase-modulation-to-intensity-modulation conversion using phase modulator cascaded with phase-shifted fiber Bragg grating. scanning characteristics MPF changes according waveform, utilized generate low-phase-noise waveforms inherent merit experiment performed. Linearly chirped and non-linearly bandwidth 2 GHz, 2-level hopping (FH) FH range 500 MHz, 240- 250-bit binary quaternary phase-coded are generated To best our knowledge, this first time that generation.