Fully programmable spectrum sliced chirped microwave photonic filter.

A novel chirped microwave photonic filter (MPF) capable of achieving a large radio frequency (RF) group delay slope and a single passband response free from high frequency fading is presented. The design is based upon a Fourier domain optical processor (FD-OP) and a single sideband modulator. The FD-OP is utilized to generate both constant time delay to tune the filter and first order dispersion to induce the RF chirp, enabling full software control of the MPF without the need for manual adjustment. An optimized optical parameter region based on a large optical bandwidth >750 GHz and low slicing dispersion < ± 1 ps/nm is introduced, with this technique greatly improving the RF properties including the group delay slope magnitude and passband noise. Experimental results confirm that the structure simultaneously achieves a large in-band RF chirp of -4.2 ns/GHz, centre frequency invariant tuning and independent reconfiguration of the RF amplitude and phase response. Finally, a stochastic study of the device passband noise performance under tuning and reconfiguration is presented, indicating a low passband noise <-120 dB/Hz.

[1]  D. Marcuse,et al.  Pulse distortion in single-mode fibers. , 1980, Applied optics.

[2]  Mario Bertero,et al.  Image restoration in chirp-pulse microwave CT (CP-MCT) , 2000, IEEE Transactions on Biomedical Engineering.

[3]  M. J. Garde,et al.  Real-Time Spectrum Analysis in Microstrip Technology , 2001, 2001 31st European Microwave Conference.

[4]  Txema Lopetegi,et al.  Real-time spectrum analysis in microstrip technology , 2003 .

[5]  X. Yi,et al.  Dispersion induced RF distortion of spectrum-sliced microwave-photonic filters , 2006, IEEE Transactions on Microwave Theory and Techniques.

[6]  J.D. McKinney,et al.  Compensation of the effects of antenna dispersion on UWB waveforms via optical pulse-shaping techniques , 2006, IEEE Transactions on Microwave Theory and Techniques.

[7]  Robert A. Minasian,et al.  Photonic signal processing of microwave signals , 2006 .

[8]  J. Capmany,et al.  Photonic microwave tunable single-bandpass filter based on a Mach-Zehnder interferometer , 2006, Journal of Lightwave Technology.

[9]  E.R. Brown,et al.  Ultra-Wideband Multifunctional Communications/Radar System , 2007, IEEE Transactions on Microwave Theory and Techniques.

[10]  B. Eggleton,et al.  Dispersion Trimming in a Reconfigurable Wavelength Selective Switch , 2008, Journal of Lightwave Technology.

[11]  J. Azana,et al.  An Electronic UWB Continuously Tunable Time-Delay System With Nanosecond Delays , 2008, IEEE Microwave and Wireless Components Letters.

[12]  Xiaoke Yi,et al.  Microwave photonic signal processing , 2007, 2011 International Topical Meeting on Microwave Photonics jointly held with the 2011 Asia-Pacific Microwave Photonics Conference.

[13]  Bingkun Zhou,et al.  Tunable chirped microwave photonic filter employing a dispersive Mach-Zehnder structure. , 2011, Optics letters.

[14]  Kun Qiu,et al.  Proposal for all-optical generation of multiple-frequency millimeter-wave signals for RoF system with multiple base stations using FWM in SOA. , 2011, Optics express.

[15]  J. Capmany,et al.  Highly chirped single-bandpass microwave photonic filter with reconfiguration capabilities. , 2011, Optics express.

[16]  Xiaoping Zheng,et al.  Highly reconfigurable microwave photonic single-bandpass filter with complex continuous-time impulse responses. , 2012, Optics express.

[17]  R. Minasian,et al.  High-Resolution Single Bandpass Microwave Photonic Filter With Shape-Invariant Tunability , 2014, IEEE Photonics Technology Letters.