Photonic microwave transversal filter employing a fiber-Bragg-grating-based multiple resonator (original) (raw)
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Tunable Photonic Microwave Filter With Single Bandpass Based on a Phase-Shifted Fiber Bragg Grating
IEEE Photonics Technology Letters, 2000
A novel tunable photonic microwave single bandpass filter based on the optical resonance originated by a local phase shift introduced in the periodic structure of a fiber Bragg grating is proposed. Dynamic control of the phase shift is obtained employing a piezoelectric transducer in order to stretch the grating, thus changing the resonance wavelength. A photonic microwave filter is obtained by using an optical single-sideband modulation. Experimental results are provided in order to prove the concept.
Optics Communications, 2007
This paper presents a tunable transversal filter working with a single optical carrier at constant wavelength. The filter consists of a set of chirped gratings whose time delay is tuned with respect to the emission wavelength of a fiber laser by a piezoelectric actuator; extra lengths of fiber are inserted in the filter arms in order to avoid interferences between signals reflected in different gratings. Two and three taps filters are experimentally demonstrated, the filters transfer function is electronically tuned within the free spectral range.
Multichannel fiber gratings with tailored dispersion profiles for RF filtering
IEEE Photonics Technology Letters, 2005
A wide-band continuously tunable microwave photonic filter based on a novel multichannel chirped fiber Bragg grating is demonstrated. The four-tap filter demonstrates continuous tuning from 4.5 to 14 GHz through the use of uniquely incrementing dispersion profiles written within each channel of the grating. This allows for a simplified tuning method based on the collective wavelength tuning of a single multiwavelength optical source over a narrow wavelength range.
International Journal of Scientific Research And Education, 2016
Microwave photonic filters are belongs to the family of photonic subnetwork outlined with the point of conveying identical assignments to those of a common microwave filter inside a radio recurrence (RF) framework or connection, conveying supplementary favourable circumstances natural to photonics, for example, low misfortune, high data transfer capacity, invulnerability to electromagnetic obstruction (EMI), tunability, and reconfigurability. On the other side, microwave photonic channels can discover applications in particular fields, for example, radar and photonic beam steering of staged exhibited reception apparatuses, where dynamical reconfiguration is an additional quality. The wide data transmission and low misfortune offered by current photonics have prompted a ever increasing engross in the configuration and usage of photonically helped answers for the era, preparing, control and allocation of microwave signals, a zone called microwave photonics.
Photonic generation and processing of microwave arbitrary waveforms has been a topic of interest recently. Compared with the electronic techniques, photonics techniques provide the capabilities of generating and processing highfrequency and large-bandwidth microwave waveforms which cannot be fulfilled by the electronic techniques, In this paper, techniques to generate and process microwave arbitrary waveforms in the optical domain using advanced fiber Bragg gratings (FBGs) are reviewed, with an emphasis on the system architectures in which FBGs are employed as spectral shapers or optical filters. The challenges in using FBGs for microwave arbitrary waveform generation and processing are also discussed.
Harmonic suppressed photonic microwave filter
IEEE/OSA Journal of Lightwave Technology, 2003
This paper proposes a photonic microwave filter based on wavelength-division multiplexing (WDM) of multiple optical carriers and dispersive media. Harmonic suppression is obtained using nonuniform tap spacing to extend the filter free spectral range by a Vernier effect. The experimental results presented are in excellent agreement with theory.
Microwave photonic bandpass filter using a multi-wavelength laser with a bell-shaped power profile
Microwave and Optical Technology Letters, 2009
A low cost sidelobe suppressed tunable microwave photonic bandpass filter is proposed and experimentally demonstrated. The filter is based on a multi-wavelength ring laser and a segment of single mode fiber as a dispersive element. Through adjustment of the power profile of the multi-wavelength laser to a bell shape, a filter frequency response without sidelobes is achieved. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1329–1332, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24316
Electronics, 2020
In this paper, we have demonstrated a duplex microwave photonic filter system. The reconfigurability of a microwave passband filter by using a birefringent optical filter has also been demonstrated experimentally. The effect of filtering normally depends on the intermodal separation of a multimode laser diode (MLD), as well as the chromatic dispersion parameter and the length of a Single Mode-Standard Fiber (SM-SF). However, in this work, the intermodal separation of the MLD is altered by an optical filter which consists of a section of birefringent optical fiber (BOF) placed between crossed polarizers. Using this filter, six passbands in the frequency range of 0–10 GHz are obtained. Our duplex Microwave Photonic Filter (MPF) system is driven by only a single optical source. Performance evaluation for the filtered passband is also given in terms of the Signal-to-Noise-Ratio (SNR). On average, an SNR of 13.87 dB is obtained for all the passbands generated by our duplex Microwave Phot...