Photonic microwave filter with single bandpass response based on Brillouin processing and SSB-SC
ABSTRACT A photonic structure for microwave filtering with single passband and the capability of continuously tuning the filter response over a broad microwave range is proposed and experimentally demonstrated. The scheme is based on using stimulated Brillouin scattering and single sideband modulation with suppressed carrier (SSB-SC).
- SourceAvailable from: Christopher G. Poulton[Show abstract] [Hide abstract]
ABSTRACT: Demonstration of continuously tunable delay, low-noise lasers, dynamically controlled gratings, and optical phase shifting using the stimulated Brillouin scattering (SBS) process has lead to the emergence of SBS as a promising technology for microwave photonics. On-chip realization of SBS enables photonic integration of microwave photonic signal processing and offers significantly enhanced performance and improved efficiency. On-chip stimulated Brillouin scattering is reviewed in the context of slow-light based tunable delay, low-noise narrow linewidth lasers and filtering for integrated microwave photonics. A discussion on key material and device properties, necessary to enable on-chip Brillouin scattering using both the single-pass and resonator geometry, is presented along with an outlook for photonic integration of microwave signal processing and generation in other platforms.Laser & Photonics Review 09/2014; 8(5). DOI:10.1002/lpor.201300154 · 9.31 Impact Factor
- [Show abstract] [Hide abstract]
ABSTRACT: We numerically investigate the operational principle and performance of stimulated Brillouin scattering based multiple microwave frequency signals measurement. The unknown signals are processed specially to generate a gain region which is measured by phase modulation to amplitude modulation converting. By sweeping the vector network analyzer, both single and multiple frequencies measurement can be achieved. The loss spectrum generated by one of the pumps is fully compensated by the gain spectrum of the other pump, which increases the measurement range from 2νB to 4νB.Optics Express 12/2013; 21(26):31740-50. DOI:10.1364/OE.21.031740 · 3.53 Impact Factor
- [Show abstract] [Hide abstract]
ABSTRACT: We present a novel microwave photonic single-passband filter based on polarization control through simulated Brillouin scattering (SBS). The principle of the filter is based on a vector SBS process, which is different from the previously reported scalar SBS technique. For a radio-frequency (RF) modulated signal launched to the proposed processor, the state of polarization (SOP) of the optical carrier is rotated by 90° through a two-step SBS process. As a result, the RF signals cannot be recovered in the photodetector (PD). To recover the desirable RF signal, the SOP of the RF modulated sideband is rotated by another pump wave. Since the orthogonal polarization condition between the optical carrier and the sideband is destroyed, the desirable RF signal can be recovered. By adjusting the wavelength of the pump wave, the frequency response of the filter is tunable in a frequency range from ~2 to 20 GHz with out-of-band rejection of ~30 dB and -3 dB bandwidth of ~20 MHz. In addition, for any modulation format, it is converted to the single-sideband (SSB) modulation by the proposed filter. Therefore, the system is expected to be immune to the fiber dispersion-induced power fading. Moreover, it is independent of the modulation formats of the incoming signal wave. The filter structure can be inserted anywhere in conventional fiber-optic links without the need for modifying the link configuration and the transmitter.IEEE Photonics Journal 08/2013; 5(4):5501411-5501411. DOI:10.1109/JPHOT.2013.2271716 · 2.33 Impact Factor