|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Long-distance ranging with high precision using a soliton microcomb显示文摘Laser-based light detection and ranging(lidar)plays a significant role in both scientific and industrial areas.However,it is difficult for existing lidars to achieve high speed,high precision,and long distance simultaneously.Here,we demonstrate a high-performance lidar based on a chip-scaled soliton microcomb(SMC)that can realize all three specialties simultaneously.Aided by the excellent properties of ultrahigh repetition rate and the smooth envelope of the SMC,traditional optical frequency comb(OFC)-based dispersive interferometry is heavily improved and the measuring dead zone induced by the mismatch between the repetition rate of the OFC and resolution of the optical spectrum analyzer is totally eliminated.Combined with an auxiliary dual-frequency phase-modulated laser range finder,the none-dead-zone measurable range ambiguity is extended up to 1500 m.The proposed SMC lidar is experimentally implemented in both indoor and outdoor environment.In the outdoor baseline field,real-time,high-speed(up to 35 k Hz)measurement of a long distance of^1179 m is achieved with a minimum Allan deviation of 5.6μm at an average time of 0.2 ms(27 nm at an average time of 1.8 s after high-pass filtering).The present SMC lidar approaches a compact,fast,high-precision,and none-dead zone long-distance ranging system,aimed at emerging applications of frontier basic scientific research and advances in industrial manufacturing. | JINDONG WANG ZHIZHOU LU WEIQIANG WANG FUMIN ZHANG JIAWEI CHEN YANG WANG JIHUI ZHENG SAI T.CHU WEI ZHAO BRENT E.LITTLE XINGHUA QU WENFU ZHANG | 2020 | Photonics Research2020，8，12： | 8 |
| 2 | Photonic microwave true time delays for phased array antennas using a 49 GHz FSR integrated optical micro-comb source[Invited]显示文摘We demonstrate significantly improved performance of a microwave true time delay line based on an integrated optical frequency comb source. The broadband micro-comb(over 100 nm wide) features a record low free spectral range(FSR) of 49 GHz, resulting in an unprecedented record high channel number(81 over the C band)—the highest number of channels for an integrated comb source used for microwave signal processing. We theoretically analyze the performance of a phased array antenna and show that this large channel count results in a high angular resolution and wide beam-steering tunable range. This demonstrates the feasibility of our approach as a competitive solution toward implementing integrated photonic true time delays in radar and communications systems. | XINGYUAN Xu JIAYANG Wu THACH G.NGUYEN TANIA MOEIN SAI T.CHU BRENT E.LITTLE ROBERTO MORANDOTTI ARNAN MITCHELL DAVID J.Moss | 2018 | Photonics Research2018，6，5： | 4 |
| 3 | Excitotoxicity, calcium and mitochondria: a triad in synaptic neurodegeneration显示文摘Glutamate is the most commonly engaged neurotransmitter in the mammalian central nervous system,acting to mediate excitatory neurotransmission.However,high levels of glutamatergic input elicit excitotoxicity,contribut-ing to neuronal cell death following acute brain injuries such as stroke and trauma.While excitotoxic cell death has also been implicated in some neurodegenerative disease models,the role of acute apoptotic cell death remains controversial in the setting of chronic neurodegeneration.Nevertheless,it is clear that excitatory synaptic dysregula-tion contributes to neurodegeneration,as evidenced by protective effects of partial N-methyl-D-aspartate receptor antagonists.Here,we review evidence for sublethal excitatory injuries in relation to neurodegeneration associated with Parkinson’s disease,Alzheimer’s disease,amyotrophic lateral sclerosis and Huntington’s disease.In contrast to classic excitotoxicity,emerging evidence implicates dysregulation of mitochondrial calcium handling in excitatory post-synaptic neurodegeneration.We discuss mechanisms that regulate mitochondrial calcium uptake and release,the impact of LRRK2,PINK1,Parkin,beta-amyloid and glucocerebrosidase on mitochondrial calcium transporters,and the role of autophagic mitochondrial loss in axodendritic shrinkage.Finally,we discuss strategies for normalizing the flux of calcium into and out of the mitochondrial matrix,thereby preventing mitochondrial calcium toxicity and excitotoxic dendritic loss.While the mechanisms that underlie increased uptake or decreased release of mitochondrial calcium vary in different model systems,a common set of strategies to normalize mitochondrial calcium flux can prevent excitatory mitochondrial toxicity and may be neuroprotective in multiple disease contexts. | Manish Verma Britney N.Lizama Charleen T.Chu | 2022 | Translational Neurodegeneration2022，11，1： | 4 |
| 4 | Self-locked orthogonal polarized dual comb in a microresonator显示文摘Dual combs are an emerging tool to obtain unprecedented resolution, high sensitivity, ultrahigh accuracy, broabandwidth, and ultrafast data updating rate in the fields of molecular spectroscopy, optical metrology, as well optical frequency synthesis. The recent progress in chip-based microcombs has promoted the on-chip dual-commeasuring systems to a new phase attributed to the large frequency spacing and broad spectrum. In this paper, wdemonstrate proof-of-concept dual-comb generation with orthogonal polarization in a single microresonatthrough pumping both the transverse-electric(TE) and transverse-magnetic(TM) modes simultaneously. Ttwo orthogonal polarized pumps are self-oscillating in a fiber ring cavity. The generated dual comb exhibits ecellent stability due to the intrinsic feedback mechanism of the self-locked scheme. The repetition rate the two orthogonal combs is slightly different because of the mode spacing difference between the TE anTM modes. Such orthogonal polarized dual-combs could be a new comb source for out-of-lab applicatioin the fields of integrated spectroscopy, ranging measurement, optical frequency synthesis, and microwacomb generation. | WEIQIANG WANG WENFU ZHANG ZHIZHOU LU SAI T.CHU BRENT E.LITTLE QINGHUA YANG LEI WANG WEI ZHAO | 2018 | Photonics Research2018，6，5： | 2 |
| 5 | Type-Ⅱmicro-comb generation in a filter-driven four wave mixing laser[Invited]显示文摘We experimentally demonstrate the generation of highly coherent Type-II micro-combs based on a microresonator nested in a fiber cavity loop, known as the filter-driven four wave mixing(FD-FWM) laser scheme.In this system, the frequency spacing of the comb can be adjusted to integer multiples of the free-spectral range(FSR) of the nested micro-resonator by properly tuning the fiber cavity length. Sub-comb lines with single FSR spacing around the primary comb lines can be generated. Such a spectral emission is known as a 'Type-II comb'.Our system achieves a fully coherent output. This behavior is verified by numerical simulations. This study represents an important step forward in controlling and manipulating the dynamics of an FD-FWM laser. | HUALONG BAO ANDREW COOPER SAI T.CHU DAVE J.Moss ROBERTO MORANDOTTI BRENT E.LITTLE MARCO PECClANTI ALESSIA PASQUAZI | 2018 | Photonics Research2018，6，5： | 1 |
| 6 | Stabilization of networked control systems with data packet dropout and transmission delays:Continuous-time case显示文摘 | M.Yu L.Wang T.Chu | | 0，，： | 1 |
| 7 | Exponential Stability of Neural Networks with Variable Delays via LMI Approach显示文摘 | H.Yang T.Chu C.Zhang | | 0，，01： | 1 |
| 8 | An LMI approach to networked control systems with data packet dropout and transmission delays显示文摘 | M.Yu L.Wang T.Chu F.Hao | | 0，，11： | 1 |
| 9 | Orthogonally polarized RF optical single sideband generation with integrated ring resonators显示文摘We review recent work on narrowband orthogonally polarized optical RF single sideband generators as well as dualchannel equalization,both based on high-Q integrated ring resonators.The devices operate in the optical telecommunications C-band and enable RF operation over a range of either fixed or thermally tuneable frequencies.They operate via TE/TM mode birefringence in the resonator.We achieve a very large dynamic tuning range of over 55 dB for both the optical carrier-to-sideband ratio and the dual-channel RF equalization for both the fixed and tunable devices. | Mengxi Tan Xingyuan Xu Jiayang Wu Thach G.Nguyen Sai T.Chu Brent E.Little Arnan Mitchell Roberto Morandotti David J.Moss | 2021 | Journal of Semiconductors2021，42，4： | 1 |
| 10 | Photonic radio frequency channelizers based on Kerr optical micro-combs显示文摘We review recent work on broadband RF channelizers based on integrated optical frequency Kerr micro-combs combined with passive micro-ring resonator filters,with microcombs having channel spacings of 200 and 49 GHz.This approach to realizing RF channelizers offers reduced complexity,size,and potential cost for a wide range of applications to microwave signal detection. | Mengxi Tan Xingyuan Xu Jiayang Wu Thach G.Nguyen Sai T.Chu Brent E.Little Roberto Morandotti Arnan Mitchell David J.Moss | 2021 | Journal of Semiconductors2021，42，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员