2020
2020
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Record 469 of
Title:Photonic RF fractional hilbert transformers and filters based on integrated soliton crystal microcombs
Author(s):Xu, Xingyuan(1); Tan, Mengxi(1); Wu, Jiayang(1); Nguyen, Thach G.(2); Chu, Sai T.(3); Little, Brent E.(4); Morandotti, Roberto(5,6,7); Mitchell, Arnan(2); Moss, David J.(1)Source: Optics InfoBase Conference Papers Volume: Part F183-CLEO-SI 2020 Issue: DOI: 10.1364/CLEO_SI.2020.SW4J.7 Published: 2020Abstract:We report photonic RF fractional Hilbert transformers and filters based on a 49GHz soliton crystal micro-comb source. By employing up to 80 wavelengths and controlling the channel weights, diverse transfer functions are achieved. ? OSA 2020 ? 2020 The Author(s)Accession Number: 20204509465677 -
Record 470 of
Title:Photonic RF fractional hilbert transformers and spectral filters based on 49GHz FSR soliton crystal microcombs
Author(s):Moss, David J.(1); Xu, Xingyuan(1); Tan, Mengxi(1); Wu, Jiayang(1); Nguyen, Thach G.(2); Chu, Sai T.(3); Little, Brent E.(4); Morandotti, Roberto(5,6); Mitchell, Arnan(2)Source: TechRxiv Volume: Issue: DOI: 10.36227/techrxiv.12749837 Published: August 1, 2020Abstract:We report photonic RF fractional Hilbert transformers and filters based on a 49GHz soliton crystal micro-comb source. By employing up to 80 wavelengths and controlling the channel weights, diverse transfer functions are achieved. ? 2020, CC BY.Accession Number: 20220138711 -
Record 471 of
Title:Axial plane single-molecule super-resolution microscopy of whole cells
Author(s):An, Sha(1,2,3,4); Ziegler, Karl Ferdinand(1); Zhang, Peiyi(1); Wang, Yu(5,6); Kwok, Tim(7); Xu, Fan(1); Bi, Cheng(1); Matosevic, Sandro(8); Yin, Peng(5,6); Li, Tongcang(2,9); Huang, Fang(1,10,11)Source: Biomedical Optics Express Volume: 11 Issue: 1 DOI: 10.1364/BOE.377890 Published: 2020Abstract:Fluorescence nanoscopy has become an indispensable tool for studying organelle structures, protein dynamics, and interactions in biological sciences. Single-molecule localization microscopy can now routinely achieve 10–50 nm resolution through fluorescently labeled specimens in lateral optical sections. However, visualizing structures organized along the axial direction demands scanning and imaging each of the lateral imaging planes with fine intervals throughout the whole cell. This iterative process suffers from photobleaching of tagged probes, is susceptible to alignment artifacts and also limits the imaging speed. Here, we focused on the axial plane super-resolution imaging which integrated the single-objective light-sheet illumination and axial plane optical imaging with single-molecule localization technique to resolve nanoscale cellular architectures along the axial (or depth) dimension without scanning. We demonstrated that this method is compatible with DNA points accumulation for imaging in nanoscale topography (DNA-PAINT) and exchange-PAINT by virtue of its light-sheet illumination, allowing multiplexed super-resolution imaging throughout the depth of whole cells. We further demonstrated this proposed system by resolving the axial distributions of intracellular organelles such as microtubules, mitochondria, and nuclear pore complexes in both COS-7 cells and glioblastoma patient-derived tumor cells. ? 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.Accession Number: 20200608134641 -
Record 472 of
Title:Photonic RF Fractional Hilbert Transformers and Filters Based on Integrated Soliton Crystal Microcombs
Author(s):Xu, Xingyuan(1); Tan, Mengxi(1); Wu, Jiayang(1); Nguyen, Thach G.(2); Chu, Sai T.(3); Little, Brent E.(4); Morandotti, Roberto(5,6,7); Mitchell, Arnan(2); Moss, David J.(1)Source: Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS Volume: 2020-May Issue: DOI: null Published: May 2020Abstract:We report photonic RF fractional Hilbert transformers and filters based on a 49GHz soliton crystal micro-comb source. By employing up to 80 wavelengths and controlling the channel weights, diverse transfer functions are achieved. ? 2020 OSA.Accession Number: 20204009262759 -
Record 473 of
Title:BCG signal processing based on advanced LMS filter for optical fiber monitor
Author(s):Liu, Yifan(1); Xu, Wei(2,3); Yu, Changyuan(1)Source: Proceedings of SPIE - The International Society for Optical Engineering Volume: 11547 Issue: DOI: 10.1117/12.2575310 Published: 2020Abstract:Heart Rate Variability (HRV) analysis is an important tool for health monitoring. A non-invasive smart health monitoring system based on optical fiber interferometer can get HRV information from the Ballistocardiogram (BCG) signal. For some patients, the HRV can hardly be calculated due to the interferences from breath and other vibrations. In this research, we obtain a stable and high-sensitive BCG signal by a Mach-Zehnder interferometer (MZI) based sensor. In order to reduce the noise in signal, we introduce an advanced least mean squares (LMS) adaptive filter into the procedure. We use the signal processed by a bandpass filter as the adesired signal' to deal with the raw data and obtain a preferable output for HRV calculation. ? 2020 SPIE.Accession Number: 20204809536297 -
Record 474 of
Title:Time-of-Flight Depth-Resolved Imaging with Heralded Photon Source Illumination
Author(s):Ren, Ximing(1,3); Frick, Stefan(2,4); McMillan, Alex(2); Chen, Songmao(1,5); Halimi, Abderrahim(1); Connolly, Peter W. R.(1); Joshi, Siddarth K.(2); McLaughlin, Stephen(1); Rarity, John G.(2); Matthews, Jonathan C. F.(2); Buller, Gerald S.(1)Source: Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS Volume: 2020-May Issue: DOI: null Published: May 2020Abstract:We demonstrate 3D time-of-flight imaging from a scattering target illuminated with a heralded single photon source. Our image reconstruction algorithm achieves millimeter depth resolution with only 0.3 average detected photons per image pixel. ? 2020 OSA.Accession Number: 20204009262054 -
Record 475 of
Title:Time-of-flight depth-resolved imaging with heralded photon source illumination
Author(s):Ren, Ximing(1,3); Frick, Stefan(2,4); McMillan, Alex(2); Chen, Songmao(1,5); Halimi, Abderrahim(1); Connolly, Peter W.R.(1); Joshi, Siddarth K.(2); McLaughlin, Stephen(1); Rarity, John G.(2); Matthews, Jonathan C.F.(2); Buller, Gerald S.(1)Source: Optics InfoBase Conference Papers Volume: Part F181-CLEO-AT 2020 Issue: DOI: 10.1364/CLEO_AT.2020.AM3K.6 Published: 2020Abstract:We demonstrate 3D time-of-flight imaging from a scattering target illuminated with a heralded single photon source. Our image reconstruction algorithm achieves millimeter depth resolution with only 0.3 average detected photons per image pixel. CLEO 2020 ? OSA 2020 ? 2020 The Author(s).Accession Number: 20204509460510 -
Record 476 of
Title:Enhanced four-wave mixing in micro-ring resonators integrated with layered graphene oxide films
Author(s):Wu, Jiayang(1); Yang, Yunyi(1); Zhang, Yuning(1); Qu, Yang(1); Jia, Linnan(1); Xu, Xingyuan(1); Chu, Sai T.(2); Little, Brent E.(3); Morandotti, Roberto(4,5); Jia, Baohua(1); Moss, David J.(1)Source: Optics InfoBase Conference Papers Volume: Part F183-CLEO-SI 2020 Issue: DOI: 10.1364/CLEO_SI.2020.SM4L.5 Published: 2020Abstract:We experimentally demonstrate enhanced four-wave mixing in micro-ring resonators (MRRs) integrated with graphene oxide films. We achieve up to ~7.6-dB enhancement in conversion efficiency for a uniformly coated MRR and ~10.3-dB for a patterned device. ? OSA 2020 ? 2020 The Author (s)Accession Number: 20204509465754 -
Record 477 of
Title:New Insight Into Lunar Regolith-Forming Processes by the Lunar Rover Yutu-2
Author(s):Lin, Honglei(1); Lin, Yangting(1); Yang, Wei(1); He, Zhiping(2); Hu, Sen(1); Wei, Yong(1); Xu, Rui(2); Zhang, Jinhai(1); Liu, Xiaohui(3); Yang, Jianfeng(4); Xing, Yan(5); Yu, Chengwu(5); Zou, Yongliao(6)Source: Geophysical Research Letters Volume: 47 Issue: 14 DOI: 10.1029/2020GL087949 Published: July 28, 2020Abstract:The Yutu-2 rover of the Chang'E-4 spacecraft observed many meter-sized shallow pits fully covered with small fragments, distinct from the typical rock-free impact craters with comparable sizes in the landing area. The unique morphology of the pits and the visible and near-infrared spectra of the fragments suggest that the fragments are broken pieces of impact melt-conglutinated regolith breccia projectiles, which were excavated from preexisting craters. The rareness of rock on the landing area surface suggests that the preexisting craters were probably small in size (e.g., ?2020. American Geophysical Union. All Rights Reserved.Accession Number: 20203108991289 -
Record 478 of
Title:Broadband photonic RF channelizer based on a Kerr soliton crystal microcomb
Author(s):Tan, Mengxi(1); Xu, Xingyuan(1,2); Wu, Jiayang(1); Boes, Andreas(3); Corcoran, Bill(2); Nguyen, Thach G.(3); Chu, Sai T.(4); Little, Brent E.(5); Morandotti, Roberto(6); Mitchell, Arnan(3); Moss, David J.(1)Source: 2020 International Topical Meeting on Microwave Photonics, MWP 2020 - Proceedings Volume: Issue: DOI: null Published: November 24, 2020Abstract:We report a broadband RF channelizer with 92 channels using a 49 GHz soliton crystal microcomb with another high-Q MRR as a passive periodic filter with a resolution of 121.4 MHz. We achieve an instantaneous RF bandwidth of 8.08 GHz and 17.55 GHz via thermal tuning. Our approach is a significant step towards monolithically integrated photonic RF receivers with reduced complexity, size, and high performance for broadband analog signal processing and digital-compatible signal detection. ? 2020 IEICE.Accession Number: 20210609881344 -
Record 479 of
Title:Photonic crystal rod-based high-performance ultrafast fiber laser system
Author(s):Lv, Zhiguo(1); Yang, Zhi(2); Li, Qianglong(2); Li, Feng(2); Wang, Yishan(2); Zhao, Wei(2); Yang, Xiaojun(2)Source: High Power Laser Science and Engineering Volume: 8 Issue: DOI: 10.1017/hpl.2020.42 Published: 2020Abstract:In this paper, we innovatively conduct a Porro prism-based beam pointing stability promotion technique research and realize a high-performance rod-type photonic crystal fiber-based chirped pulse amplification (CPA) system, mainly including a frequency-reduced all-fiber pre-amplification stage, photonic crystal rod-based main amplification stage, and 1600 lines/mm transmission grating-pair compressor. Laser output with average power of 50 W, repetition rates of 500 kHz, pulse energy of 100 μJ, pulse duration of 830 fs, beam quality of M2?C over 8 h is realized. The high-performance laser system has an enormous application potential in fundamental research and precision manufacturing fields. ? The Author(s), 2020.Accession Number: 20214611156545 -
Record 480 of
Title:Status of the follow-up X-ray telescope onboard the Einstein probe satellite
Author(s):Chen, Yong(1); Cui, WeiWei(1); Han, DaWei(1); Wang, Juan(1); Yang, YangJi(1); Wang, YuSa(1); Li, Wei(1); Ma, Jia(1); Xu, Yupeng(1); Lu, FangJun(1); Chen, HouLei(2); Tang, QingJun(2); Yuan, Weimin(3); Friedrich, Peter(4); Meidinger, Norbert(4); Keil, Isabell(4); Burwitz, Vadim(4); Eder, Josef(4); Hartmann, Katinka(4); Nandra, Kirpal(4); Keereman, Arnoud(5); Santovincenzo, Andrea(5); Vernani, Dervis(6); Bianucci, Giovanni(6); Valsecchi, Giuseppe(6); Wang, Bo(7); Wang, LangPing(7); Wang, DianLong(7); Li, Duo(7); Sheng, LiZhi(8); Qiang, PengFei(8); Shi, RongRong(9); Chao, XiangYu(9); Song, ZeYu(1); Zhang, Ziliang(1); Huo, Jia(1); Wang, Hao(1); Cong, Min(1); Yang, XiongTao(1); Hou, Dongjie(1); Zhao, XiaoFan(1); Zhao, ZiJian(1); Chen, TianXiang(1); Li, MaoShun(1); Zhang, Tong(1); Luo, LaiDan(1); Xu, JingJing(1); Li, Gang(1); Zhang, Qian(1); Bi, XiYan(1); Zhu, YuXuan(1,10); Yu, Nian(1); Chen, Can(1); Lv, ZhongHua(1); Lu, Bing(1); Zhang, JiaWei(1)Source: Proceedings of SPIE - The International Society for Optical Engineering Volume: 11444 Issue: DOI: 10.1117/12.2562311 Published: 2020Abstract:The Einstein Probe (EP) is an X-ray astronomical mission mainly devoting to time-domain astronomy. There are two main scientific payloads onboard EP, the Wide Field X-ray Telescope (WXT) based on the lobster eye optics and the Follow-up X-ray Telescope (FXT). FXT contains two Wolter-1 mirrors with a pnCCD detector on each focus. The total effective area is about 600 cm2 and the energy range is 0.3-10 keV. The pnCCD detector cooled by a pulse tube cooler enables high-resolution spectroscopy and imaging combined with excellent time resolution. It will also have several working modes with time resolution ranging from tens of microseconds to 50 milliseconds. Currently, the FXT is in its qualification model phase. The mirror assemblies (STM and TCM) as well as the pnCCD EM module have been manufactured and tested. ? 2020 SPIEAccession Number: 20210309778768