Photonic Generation of Ultra-Wideband Signals via Pulse Compression in a Highly Nonlinear Fiber

Abstract

Abstract-A simple and reconfigurable scheme for photonic generation of ultra-wideband (UWB) waveforms is proposed, simulated, and demonstrated. The technique relies on pulse compression in a highly nonlinear fiber and subsequent differential detection. A center frequency of 25 GHz and a fractional bandwidth of 120% are obtained. The generated waveform is also adjusted to closely approximate the spectral mask for unlicensed UWB indoor wireless communications.

Reconfigurable Generation of High-Order Ultra-Wideband Waveforms Using Edge Detection

“…The technique could be particularly suitable for high-frequency waveforms, such as those intended for high-resolution vehicular radar systems. Waveforms that approximate the FCC spectral mask for indoor wireless communications were demonstrated as well [20], [21]. Better compliance with the FCC standard can be achieved with a choice of a narrower BPF: Fig.…”

“…7 [20], [21], in which the setup parameters were adjusted to approximate the FCC mask for unlicensed indoor wireless UWB communication [2]. In this experiment, Gaussian pulses of width ps, peak power W and spacing ps were used.…”

“…High-order UWB waveforms having a center frequency of 34 GHz and a fractional bandwidth of 70% are generated. The analysis and measurements provide a significant extension to previous works utilizing nonlinear propagation in fibers [18]- [21], which were restricted to monocycle and doublet pulse shapes of lower central frequencies. The results provide a first demonstration, to the best of our knowledge, of high-order UWB waveforms generation with a single laser source and off-the-shelf components.…”

Ultra-Wideband Waveform Generation Using Nonlinear Propagation in Optical Fibers

“…Figure 5 shows the measured optical spectra The flexibility of the waveform generation method is illustrated in Fig. 7 (Zadok et al, 2009;Zadok et al, 2010a), in which the setup parameters were adjusted to approximate the FCC mask for unlicensed indoor wireless UWB communication (FCC, 2002). In this experiment, Gaussian pulses (m = 2) of width 0 τ = 100 ps, peak power in P = 1 W and spacing 0 T = 800 ps were used.…”

“…2009; Zadok et al, 2010a, 2010b. All-optical edge detectors of the input pulses intensity are used to generate two temporally-narrowed replicas of the input pulse train.…”