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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.
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.
We demonstrate a dispersion-tuned fiber optical parametric oscillator (FOPO)-based swept source with a sweep rate of 40 kHz and a wavelength tuning range of 109 nm around 1550 nm. The cumulative speed exceeds 4,000,000 nm/s. The FOPO is pumped by a sinusoidally modulated pump, which is driven by a clock sweeping linearly from 1 to 1.0006 GHz. A spool of… (More)
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)
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)
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.