Filters








138 Hits in 6.6 sec

Tunable Multiband Microwave Photonic Filters

Mable Fok, Jia Ge
2017 Photonics  
Table 1 shows a list of multiband RF filter examples with two or more passbands based on various RF electronic and microwave photonic techniques.  ...  to promising developments of tunable microwave photonic multiband filters.  ...  Independently Tunable Dual-Passband Filter Based on Phase Modulator and an Equivalent Phase-Shifted Fiber Bragg Grating This approach demonstrates a microwave photonic filter with two independently tunable  ... 
doi:10.3390/photonics4040045 fatcat:nihctid6ujdbvooamcnhrsa4qa

Recent Breakthroughs in Microwave Photonics

I Gasulla, J Lloret, J Sancho, S Sales, J Capmany
2011 IEEE Photonics Journal  
; tunable, reconfigurable, and adaptive microwave photonic filtering, as well as the application of slow and fast light effects to the implementation of tunable microwave phase shifting and true time delay  ...  Recent research across a broad range of MWP applications is summarized, including photonic generation of microwave, millimeter, and Terahertz waves; broadband optical beamforming for phased array antennas  ...  This area embraces solutions for optical beamforming, photonic filtering, microwave phase shifting, and discriminators for phase-modulated links.  ... 
doi:10.1109/jphot.2011.2130517 fatcat:24thkgtqorgvnf7uz4dwvvbdd4

Fiber Bragg gratings for microwave photonics subsystems

Chao Wang, Jianping Yao
2013 Optics Express  
In this paper, we discuss the recent development in employing FBGs for various microwave photonics subsystems, with an emphasis on subsystems for microwave photonic signal processing and microwave arbitrary  ...  A fiber Bragg grating (FBG) is one of the key components in microwave photonics systems due to its unique features such as flexible spectral characteristics, low loss, light weight, compact footprint,  ...  In [58] , an optical spectral shaper having tunable spectral response was demonstrated based on a Sagnac-loop mirror structure incorporating a highly reflective LCFBG.  ... 
doi:10.1364/oe.21.022868 pmid:24104174 fatcat:k272wiyzsbeelnjcywjlfzweee

Ultrafast and Wideband Microwave Photonic Frequency-Hopping Systems: A Review

Liu, Fok
2020 Applied Sciences  
The operation principles and results of various microwave photonics-enabled frequency-hopping systems are comprehensively discussed, which have wide hopping-frequency bandwidth and frequency-hopping speed  ...  Conventional electronics-based frequency-hopping systems suffer from low data rate, low hopping speed, and narrow hopping-frequency bandwidth.  ...  By incorporating a LiNbO 3 phase modulator in a loop mirror filter, an ultrafast RF switch can be achieved, as shown in Figure 8a [26, 48] .  ... 
doi:10.3390/app10020521 fatcat:ykk7mdaga5cdnn2q5nbatdwcdy

Satellite Payloads Pay Off

Shilong Pan, Dan Zhu, Shifeng Liu, Kun Xu, Yitang Dai, Tianliang Wang, Jianguo Liu, Ninghua Zhu, Yong Xue, Naijin Liu
2015 IEEE Microwave Magazine  
If a flexible microwave photonic filter is incorporated in the oscillation loop, the OEO can be made frequency tunable.  ...  A tunable single-passband microwave photonic filter is implemented for each optical carrier based on phase-modulation/intensity-modulation conversion.  ... 
doi:10.1109/mmm.2015.2441619 fatcat:mlhlwiemdncvjcmsappk5dnak4

Programmable optical processor chips: toward photonic RF filters with DSP-level flexibility and MHz-band selectivity

Yiwei Xie, Zihan Geng, Leimeng Zhuang, Maurizio Burla, Caterina Taddei, Marcel Hoekman, Arne Leinse, Chris G.H. Roeloffzen, Klaus-J. Boller, Arthur J. Lowery
2017 Nanophotonics  
and points toward photonic RF filters with digital signal processing (DSP)-level flexibility, hundreds-GHz bandwidth, MHz-band frequency selectivity, and full system integration on a chip scale.  ...  As a promising application, such processors enables photonic implementations of reconfigurable radio frequency (RF) filters with wide design flexibility, large bandwidth, and high-frequency selectivity  ...  The optical filter is an eighthorder coupled RR network with an FSR of 1.4 GHz and has tunable couplers and tunable phase shifters in all ring loops.  ... 
doi:10.1515/nanoph-2017-0077 fatcat:aixruyxo2jfijathxabs3tgpcm

Wideband 360° microwave photonic phase shifter based on slow light in semiconductor optical amplifiers

Weiqi Xue, Salvador Sales, José Capmany, Jesper Mørk
2010 Optics Express  
In this work we demonstrate for the first time, to the best of our knowledge, a continuously tunable 360° microwave phase shifter spanning a microwave bandwidth of several tens of GHz (up to 40 GHz) by  ...  The proposed device exploits the phenomenon of coherent population oscillations, enhanced by optical filtering, in combination with a regeneration stage realized by four-wave mixing effects.  ...  Implementations based on electronic phase-locked loops [22] can achieve 640° phase shifts at 40 GHz, but require complex designs and have a limited bandwidth (~40 MHz).  ... 
doi:10.1364/oe.18.006156 pmid:20389638 fatcat:z455lflbrbdt7fcbxutgyswke4

Integrated Microwave Photonic Filters

Yang Liu, Amol Choudhary, David Marpaung, Benjamin Eggleton
2020 Advances in Optics and Photonics  
Underpinned by advanced integrated photonics technologies, emerging integrated microwave photonic (IMWP) filter platforms enable reconfigurable and widely tunable RF signal filtering functionalities that  ...  ID 378686) Microwave signal filtering is a fundamental and central functionality in radio-frequency (RF) systems.  ...  ., IEEE Photon. Technol. Letter 22, 1276-1278 (2010) [59]. (d) Measured center frequency tunability of an on-chip Brillouin-based bandpass filter using the phase modulation.  ... 
doi:10.1364/aop.378686 fatcat:sgukus6jrrek7oqwqxnt3vth5i

Integrated microwave photonics [article]

David Marpaung, Chris Roeloffzen, Rene Heideman, Arne Leinse, Salvador Sales, Jose Capmany
2012 arXiv   pre-print
Microwave photonics (MWP) is an emerging field in which radio frequency (RF) signals are generated, distributed, processed and analyzed using the strength of photonic techniques.  ...  This article reviews the recent advances in this emerging field which is dubbed as integrated microwave photonics.  ...  Researchers have recently demonstrated for the first time both notch and bandpass microwave filters based on such component.  ... 
arXiv:1211.4114v1 fatcat:qfdoijayszbevdmisbr2nxtzgu

Coherent photonic processing of microwave signals using spatial light modulators: programmable amplitude filters

Shijun Xiao, A.M. Weiner
2006 Journal of Lightwave Technology  
Index Terms-Microwave photonics, optical filters, optical signal processing, pulse shaping.  ...  In contrast to previous work on discrete time optical processing of microwave signals, their approach allows direct synthesis of microwave filter functions in spectral domain without computing filter coefficients  ...  One important merit of photonic-assisted filtering is that wideband optical amplification (EDFA) can be used in the photonic loop to improve the microwave gain, subject of course to additional noise resulting  ... 
doi:10.1109/jlt.2006.874649 fatcat:mvfjyosciva5llcpndbs3niblq

2009 Index IEEE Photonics Technology Letters Vol. 21

2009 IEEE Photonics Technology Letters  
C., Full-Duplex Radio-Over-Fiber System Using Phase-Modulated Downlink and Intensity-Modulated Uplink; LPT Jan.1, 2009 9-11 Jia, L., see Li, J., LPT Nov.1, 2009 1639-1641 Jia, S., see Yan, L., LPT  ...  ., Compact High-Performance Multimode Interference Couplers in Silicon-on-Insulator; LPT Nov.1, 2009 1600-1602 Hamacher, M., see Kapsalis, A., LPT Nov.1, 2009 1618-1620 Hamamoto, K., see Fukuda, T.,  ...  ., +, LPT Feb.15, 2009 215-217 Widely Tunable Microwave Photonic Notch Filter Based on Slow and Fast Light Effects.  ... 
doi:10.1109/lpt.2009.2037998 fatcat:n34coz3rhzgu3bb6aqflixvoay

Photonic Generation of Wideband Chirped Microwave Waveforms

Hao Chi, Chao Wang, Jianping Yao
2021 IEEE Journal of Microwaves  
Techniques to generate chirped microwave waveforms based on photonic integrated circuits (PICs) are also discussed.  ...  In this paper, an overview on photonic generation of wideband chirped microwave waveforms is provided.  ...  The spectral shaper is implemented based on a Sagnac loop mirror that incorporates an LCFBG with 100% reflection and a tunable delay line, as shown in Fig. 5 .  ... 
doi:10.1109/jmw.2021.3085868 fatcat:f33ynu54bretrffuvxjasp75ta

Wideband wavelength tunable fiber ring laser with flattened output power spectrum

Jianliang Yang, Jianping Yao, Kejiang Zhou, Yunqi Liu
2002 Optics Communications  
The power flattening is achieved using a high-birefringence fiber loop mirror, in which a number of high-birefringence fiber sections and polarization controllers are used to get a reflection spectrum  ...  A wavelength tunable erbium-doped fiber ring laser with flattened output power spectrum over a broadband is proposed and demonstrated.  ...  Fig. 1 . 1 Wideband tunable fiber ring laser using an array of switchable fiber Bragg gratings. Fig. 3 . 3 High-birefringence fiber loop mirror for fiber laser power spectrum flattening.  ... 
doi:10.1016/s0030-4018(02)01767-4 fatcat:ghrbps5zcjdb7gv6huejwopmfi

Reconfigurable UWB pulse generator based on pulse shaping in a nonlinear optical loop mirror and differential detection

Tianye Huang, Songnian Fu, Jia Li, Lawrence R Chen, Ming Tang, Perry Shum, Deming Liu
2013 Optics Express  
mapping [6] [7] [8] [9] ; phase-to-intensity (PM-IM) modulation conversion [10] [11] [12] [13] ; microwave photonic delay line filters [14] [15] [16] ; direct current modulation of semiconductor lasers  ...  Bolea et al. reported a reconfigurable UWB pulse generator which can be applied to different pulse modulation formats using an N tap microwave photonic filter [16] .  ... 
doi:10.1364/oe.21.006401 pmid:23482210 fatcat:juau4yb23ffu7icsrvyl4ne4iq

2019 Index IEEE Photonics Journal Vol. 11

2019 IEEE Photonics Journal  
Fan, W., +, JPHOT Dec. 2019 6603407 Performances of Microwave Photonic Notch Filter Based on Microring Resonator With Dual-Drive Modulator.  ...  ., +, JPHOT Feb. 2019 4700211 Freely Tunable Dual-Passband Microwave Photonic Filter Based on Phase-to-Intensity Modulation Conversion by Stimulated Brillouin Scattering.  ... 
doi:10.1109/jphot.2020.2969544 fatcat:i2xladbx5fff7fhlgng2n4nc3e
« Previous Showing results 1 — 15 out of 138 results