Low-Phase-Noise Tenfold Frequency Multiplication Based on Integrated Optical Frequency Combs

We experimentally demonstrate a low-phase-noise tenfold frequency multiplier based on compact integrated optical comb (OFC) generator. The Indium Phosphide (InP) monolithically OFC is flexible scheme using cascaded modulators. extremely broadly tunable in wavelength and repetition frequency, making it interesting for high-spectral-purity mm-waves applications. generation with 2.6 GHz spacing 19 tones within 10 dB power range an signal-to-noise ratio (OSNR) higher than 40 reported. Using 74 GHz-bandwidth photodetector, we achieve set of phase-stabilized electrical tones, reaching carriers up to 39 high (SNR). In particular, the OFC-based tenfold-multiplied signal (26 GHz) provides remarkable feature, equivalent commercially available radiofrequency (RF) generator used as source at same power. At 26 GHz, phase-noise −50 dBc/Hz −80 are reported Hz 1 kHz offsets, respectively. proposed system enables multiplication 12-times without phase impairments, i.e., noise performance commercial RF generator, validating its potential mm-wave