A Narrow-Passband and Frequency-Tunable Microwave Photonic Filter Based on Phase-Modulation to Intensity-Modulation Conversion Using a Phase-Shifted Fiber Bragg Grating

Integrated Microwave Photonics for Wideband Signal Processing

“…The second category is based on the direct filtering method, where phase modulation to intensity conversion is used to directly map the response of an optical filter to reflect a single RF passband MWP filter in the electrical domain [59][60][61][62]. The simplicity of this method allows for the direct manipulation of the RF amplitude response and permits the execution of continuous tuning of the RF passband with a high resolution.…”

“…A broader operational bandwidth without spectral overlapping is achieved, where the undesired multiple harmonic passbands caused by the discrete time nature in FIR filters is eliminated. High extinction ratios for rejection of unwanted RF signals can be achieved with optical filters exhibiting very narrowband optical response such as phase-shifted FBG [59], a pair of FBGs [60], optical bandpass filters [61], and Brillouin selective sideband amplification [62,63].…”

Microwave Photonic Filter: A Systematic Literature Review

“…To generate unbalanced double sided band modulation system in configure by replacing PM with another DP-MZM [20]. If the power ratio of two side bands is controlled continuously, then microwave notch filter turn into tunable notch depth or can be controlled to become bandpass filter with tunable passband gain [21].To overcome the limitation of [20] one may use an optical filter with ultra-narrow passband, using PS-FBG for PM-IM conversion [22].…”

Compact tunable and reconfigurable microwave photonic filter for satellite payloads

“…A tunable center frequency MPF from 18 to 40 GHz with adjustable bandwidth from 5 to 15 GHz has been demonstrated based on this arrangement by using temperature tuned silicon on insulator microrings as passband optical filters [7]. A similar approach employs a notch optical filter to cancel one of the optical phase modulation sidebands out [8][9]. A narrow-band center frequency tunable MPF from 1 to 6.5 GHz with bandwidth on the 100 MHz range has been measured using a phase shifted FBG as the notch filter [9], but in such a setup the MPF bandwidth is fixed and determined by the optical filter bandwidth.…”

“…A similar approach employs a notch optical filter to cancel one of the optical phase modulation sidebands out [8][9]. A narrow-band center frequency tunable MPF from 1 to 6.5 GHz with bandwidth on the 100 MHz range has been measured using a phase shifted FBG as the notch filter [9], but in such a setup the MPF bandwidth is fixed and determined by the optical filter bandwidth. In [10] the frequency detuning of the optical carrier with respect to the optical filter center frequency determines the bandwidth of the MPF, while the MPF center frequency is equal to the semi-bandwidth of the optical filter.…”