By trapping the RF signal within the RFS loop and measuring the frequency components slice by slice, the proposed method provides a promising candidate for broadband instantaneous radio-frequency measurement with simple structure and commercial devices.
Single-pixel cameras based on the concepts of compressed sensing (CS) leverage the inherent structure of images to retrieve them with far fewer measurements and operate efficiently over a significantly broader spectral range than conventional silicon-based cameras. Recently, photonic time-stretch (PTS) technique facilitates the emergence of high-speed… (More)
Two methods are applied to reduce the peak-to-power ratio (PAPR) of asymmetrically clipped optical OFDM transmission systems in this paper. Bit error rate (BER) performance of different methods are compared in experiment. PAPR is reduced about 4dB by using companding transform with slightly receive sensitivity decrease.
A square-waveform generator based on a fiber optical parametric oscillator (FOPO) is proposed and demonstrated experimentally. The FOPO works fundamentally by extracting the longitudinal modes beating signal to drive the intracavity amplitude modulator. In order to broaden the longitudinal mode spacing, two sub-ring cavities with a short cavity length are… (More)
We demonstrate photonic generation of square waveform using fiber optical parametric oscillator without the external signal source. Stable square waveform pulse train at the repetition rate of 1.133 GHz is achieved.
We experimentally demonstrate a fiber optical parametric chirped pulse amplifier. A 750-fs signal is stretched to 40 ps, amplified with a gain of 30 dB through parametric process and then compressed to 808 fs.