Photonic arbitrary waveform generation applicable to multiband UWB communications

Abstract

A novel all-optical technique based on the incoherent processing of optical signals using high-order dispersive elements is analyzed for microwave arbitrary pulse generation. We show an approach which allows a full reconfigurability of a pulse in terms of chirp, envelope and central frequency by the proper control of the second-order dispersion and the incoherent optical source power distribution, achieving large values of time-bandwidth product.Photonic generation of chirped millimeter-wave pulses based on nonlinear frequency-to-time mapping in a nonlinearly chirped fiber Bragg grating," IEEE Trans. Microw. Theory Tech. 56(2), 542-553 (2008). 12. H. Chi and J. Yao, "All-fiber chirped microwave pulses generation based on spectral shaping and wavelength-to-time conversion," IEEE Trans. Microw. Theory Tech. 55(9), 1958-1963 (2007). 13. C. Wang and J. Yao, "Chirped microwave pulse generation based on optical spectral shaping and wavelength-to-time mapping using a Sagnac-loop mirror incorporating a chirped fiber Bragg grating," J. Lightwave Technol.

Harmonic distortion in microwave photonic filters

“…For both cases, an 80 nm ASE source is employed as broadband source (BBS). Initially, a BBS can introduce a large intensity noise but a balanced differential photodetection can minimize this restriction [5].…”

“…As an example, RoF systems require channel rejection and channel selection [4]. Also, alternative applications related to arbitrary waveform generation [5] and the measurement of instantaneous frequency for modern radar [6] have been demonstrated by photonic filtering.…”

Multiband-UWB Signals Generation Based on Incoherent Microwave Photonic Filters

“…As far as we know, a reduced number of structures have been proposed to MB-UWB based on hybrid photonic microwave filter [13], synchronously-apodized polarization modulation and birefringence time delay [14] or single bandpass microwave photonic filter with broadband source, a MachZehnder interferometer and dispersive elements [15].…”

“…Comparing with previous configurations [15], the stability of the waveforms generated has been improved since noninterferometric structures are used. Fig.…”

Nonlinear dispersion-based incoherent photonic processing for microwave pulse generation with full reconfigurability

“…The ability to generate high frequency and large bandwidth signals becomes extremely important in different application fields such as: radar systems, wireless communications, software defined radio and modern instrumentation [1,2]. Currently, a great number of approaches related to microwave AWG in the optical domain have been proposed including direct spaceto-time pulse shaping, temporal pulse shaping, optical spectral shaping combined with frequency-to-time mapping [3], optical line-by-line intensity and phase modulation [4], incoherent pulse shaping [5,6] and microwave photonic filtering [7].…”