Polarization-Independent Rectangular Microwave Photonic Filter Based on Stimulated Brillouin Scattering

Yi, Lilin; Wei, Wei; Jaouën, Yves; Shi, Mengyue; Han, Bing; Morvan, Michel; Hu, Weisheng

doi:10.1109/jlt.2015.2475297

Cited by 49 publications

(19 citation statements)

References 19 publications

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“…On the other hand, microwave photonic notch filters implemented using an FBG based delay line technique have a coherent interference problem [8] and microwave photonic phase shifters implemented using a dual-parallel Mach Zehnder modulator (DPMZM) have a bias drift problem. An LCOS based microwave photonic device does not generate additional noise components other than those in a fiber optic link, whereas using an FBG based delay line technique and SBS to implement a notch filter causes phase-induced intensity noise [28] and SBS noise [29], respectively. An LCOS based optical processor has no effect on the output RF signal nonlinearity.…”

Section: Lcos Based Optical Processor Operating Principle and Functionsmentioning

confidence: 99%

Microwave Photonic Devices Based on Liquid Crystal on Silicon Technology

et al. 2019

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This paper reviews the recent developments in microwave photonic devices based on liquid crystal on silicon (LCOS) technology. The operation principle, functions and important specifications of an LCOS based optical processor are described. Three microwave photonic devices, which are microwave photonic notch filters, phase shifters and couplers, reported in the past five years are focused on in this paper. In addition, a new multi-function signal processing structure based on amplitude and phase control functions in conjunction with a power splitting function in a commercial LCOS based optical processor is presented. It has the ability to realize multiple time -shifting operations and multiple frequency-independent phase shifting operations at the same time and control multiple RF signal amplitudes, in a single unit. The results for the new multi-function microwave photonic signal processor demonstrate multiple tunable true time delay and phase shifting operations with less than 3 dB amplitude variation over a very wide frequency range of 10 to 40 GHz.

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Section: Lcos Based Optical Processor Operating Principle and Functionsmentioning

confidence: 99%

Microwave Photonic Devices Based on Liquid Crystal on Silicon Technology

et al. 2019

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“…The filter passband is the transparency region between two broadened losses with an overall frequency bandwidth of 10 GHz. In order to circumvent the problem of four-wave-mixing due to multitones [25], two pump waves (pumps A and B), produced by the same source, are broadened by a direct modulation with the same sweeping signal, whose sweeping periodicity is within the signal propagation time in the fiber [15]. Due to the broadened pump waves, the broad input signal is suppressed symmetrically on both sides by the broadened SBS losses (losses A and B) in the frequency range of the Brillouin upshift, while the center frequency part stays transparent.…”

Section: Principlementioning

confidence: 99%

“…All these properties are ideal for an application of SBS as a tunable BPF [8][9][10]. The investigation of SBS in BPF ranges from the enhancement of an independent tunability of the center frequency and bandwidth through direct modulation of the pump laser [11][12][13], multitones [14], and sweeping signal [15] external modulation, via pursuing a higher selectivity using polarization pulling (PP) [16,17], multistage configuration [18], a rectangular flat-top response by modulation feedback compensation [14,15] to polarization-independent SBS filters [15,19], even the filter profile can be arbitrarily shaped by direct modulation of the pump [20]. However, as a disadvantage of almost every amplification mechanism, SBS gain also introduces amplified spontaneous emission (ASE) noise [21,22].…”

Section: Introductionmentioning

confidence: 99%

Sharp tunable and additional noise-free optical filter based on Brillouin losses

2018

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In this paper, we propose an additional noise-free, independent center frequency and bandwidth tunable optical filter based on stimulated Brillouin scattering (SBS) losses. By suppressing the out-of-band signal with two broadened symmetric SBS losses, tunable pass bandwidths from 500 MHz to 9.5 GHz and the independent center frequency tunability are demonstrated. Considering the limited SBS interaction in the center frequency range, a flat-top response with minimum 0.3 dB ripple is achieved. Assisted by the extra suppression from polarization pulling, a maximum selectivity of 20 dB and an ultrahigh 250 dB∕GHz roll-off are reached. A gain-based SBS filter adds noise to the filtered signal. However, for our proposed filter setup, no additional noise is detected due to the transparency in the passband. Considering the wide independent bandwidth and center frequency tunability, flat-top response, and low-noise characteristic, our proposed filter can be perfectly used as a supplement of most commercialized conventional tunable optical single bandpass filters, whose minimum bandwidth is limited by 10 GHz.

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“…A few schemes have been reported to obtain microwave photonic filters with flattened passband such as directly synthesized complex impulse response technique [68], spectrally shaping the optical pump source in SBS-based filters [69] or elaborate programming of FIR filters to construct a flat-top passband [70]. To aid the implementation of MWP filters with flat passband characteristics on an integrated platform, new synthesis methods to design integrated optical filters with flat top characteristics based on multiple stages of stagger-tuned microring resonator filters have also been proposed [71].…”

Section: Integrated Mwp Filtermentioning

confidence: 99%

Integrated Microwave Photonics for Wideband Signal Processing

Chew

Song

et al. 2017

Photonics

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Abstract:We describe recent progress in integrated microwave photonics in wideband signal processing applications with a focus on the key signal processing building blocks, the realization of monolithic integration, and cascaded photonic signal processing for analog radio frequency (RF) photonic links. New developments in integration-based microwave photonic techniques, that have high potentialities to be used in a variety of sensing applications for enhanced resolution and speed are also presented.

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Polarization-Independent Rectangular Microwave Photonic Filter Based on Stimulated Brillouin Scattering

Cited by 49 publications

References 19 publications

Microwave Photonic Devices Based on Liquid Crystal on Silicon Technology

Microwave Photonic Devices Based on Liquid Crystal on Silicon Technology

Sharp tunable and additional noise-free optical filter based on Brillouin losses

Integrated Microwave Photonics for Wideband Signal Processing

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