Pub Date : 2018-10-01DOI: 10.1109/ACP.2018.8596215
S. Shuai, Yinuo Xu, Zhiqiang Sun, Jiaqi Gong, T. Lang, Changyu Shen
A water droplet weight sensor based on Maher-Zehnder interferometer (MZI) cascaded Bowknot Type Taper (BTT) was proposed. MZI consists of two BTTs, and the interval between two BTTs is 2 cm. In this paper, we record the time when the fluid pumped with a peristaltic pump flows through two BTTS, and then drops a droplet into the liquid tube with a needle tubing meanwhile recording the time of the fluid flowing through the two BTTS. All the time can be obtained from the optical spectrum analyzer. Therefore, the volume of the droplet is equal to the velocity of the peristaltic pump multiplied by the cross section area of the liquid tube and the time difference between the two experiments. The weight of the droplet can be easily obtained, as long as we know its density. By measuring the time change of droplet with different weight, this method can be used to determine the droplet weight in the range of 0 ~ 200mg.
{"title":"Optic Fiber Droplet Weighing Sensor Based on Mach-Zehnder Interferometer Cascaded Bowknot Type Taper","authors":"S. Shuai, Yinuo Xu, Zhiqiang Sun, Jiaqi Gong, T. Lang, Changyu Shen","doi":"10.1109/ACP.2018.8596215","DOIUrl":"https://doi.org/10.1109/ACP.2018.8596215","url":null,"abstract":"A water droplet weight sensor based on Maher-Zehnder interferometer (MZI) cascaded Bowknot Type Taper (BTT) was proposed. MZI consists of two BTTs, and the interval between two BTTs is 2 cm. In this paper, we record the time when the fluid pumped with a peristaltic pump flows through two BTTS, and then drops a droplet into the liquid tube with a needle tubing meanwhile recording the time of the fluid flowing through the two BTTS. All the time can be obtained from the optical spectrum analyzer. Therefore, the volume of the droplet is equal to the velocity of the peristaltic pump multiplied by the cross section area of the liquid tube and the time difference between the two experiments. The weight of the droplet can be easily obtained, as long as we know its density. By measuring the time change of droplet with different weight, this method can be used to determine the droplet weight in the range of 0 ~ 200mg.","PeriodicalId":431579,"journal":{"name":"2018 Asia Communications and Photonics Conference (ACP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127416020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ACP.2018.8595871
Guangyuan Li, Yuanfu Lu, Wenquan Liu, Guohua Jiao, J. Lv
Waveguides made of hyperbolic metamaterials have unique properties such as extremely high field enhancement. Here we show that hyperbolic slot waveguides, i.e., nanoscale plasmonic slot waveguides cladded by hyperbolic metamaterials can have greatly enhanced Kerr nonlinear effects at even shorter device lengths and lower pump power compared with the conventional metallic slot waveguides. This result points to novel nanoscale waveguide designs for achieving low-driving-power and compact nonlinear nanophotonic devices that are used in diverse applications at both classical and quantum levels.
{"title":"Greatly enhanced Kerr nonlinearity in hyperbolic slot waveguides","authors":"Guangyuan Li, Yuanfu Lu, Wenquan Liu, Guohua Jiao, J. Lv","doi":"10.1109/ACP.2018.8595871","DOIUrl":"https://doi.org/10.1109/ACP.2018.8595871","url":null,"abstract":"Waveguides made of hyperbolic metamaterials have unique properties such as extremely high field enhancement. Here we show that hyperbolic slot waveguides, i.e., nanoscale plasmonic slot waveguides cladded by hyperbolic metamaterials can have greatly enhanced Kerr nonlinear effects at even shorter device lengths and lower pump power compared with the conventional metallic slot waveguides. This result points to novel nanoscale waveguide designs for achieving low-driving-power and compact nonlinear nanophotonic devices that are used in diverse applications at both classical and quantum levels.","PeriodicalId":431579,"journal":{"name":"2018 Asia Communications and Photonics Conference (ACP)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127424700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ACP.2018.8595913
Xiao-hui Jiang, D. Dai
An ultra-compact, ultra-broadband and polarization-insensitive 2×2 3 dB power splitter on silicon is proposed and demonstrated with a coupling region as short as 4.6 μm. The fabricated 3dB power splitter works very well for both TE and TM polarizations in a broad band from 1520 nm to 1610 nm.
{"title":"Compact, Broadband, and Polarization-insensitive 3 dB power splitter on silicon","authors":"Xiao-hui Jiang, D. Dai","doi":"10.1109/ACP.2018.8595913","DOIUrl":"https://doi.org/10.1109/ACP.2018.8595913","url":null,"abstract":"An ultra-compact, ultra-broadband and polarization-insensitive 2×2 3 dB power splitter on silicon is proposed and demonstrated with a coupling region as short as 4.6 μm. The fabricated 3dB power splitter works very well for both TE and TM polarizations in a broad band from 1520 nm to 1610 nm.","PeriodicalId":431579,"journal":{"name":"2018 Asia Communications and Photonics Conference (ACP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125904150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ACP.2018.8595831
Xiao Han, Mingwei Yang, I. Djordjevic
We propose a hybrid probabilistic-geometric-shaped (HPGS) 8-PAM signaling scheme, as a candidate suitable for data centers’ communications. The properly chosen HPGS 8-PAM parameters for different SNR-regions allows us to closely approach the Shannon limit. We demonstrate that LPDC-coded HPGS 8-PAM outperforms both probabilistic-shaped and uniform LDPC-coded 8-PAM schemes.
{"title":"Hybrid Probabilistic-Geometric-Shaped 8-PAM Suitable for Data Centers’ Communication","authors":"Xiao Han, Mingwei Yang, I. Djordjevic","doi":"10.1109/ACP.2018.8595831","DOIUrl":"https://doi.org/10.1109/ACP.2018.8595831","url":null,"abstract":"We propose a hybrid probabilistic-geometric-shaped (HPGS) 8-PAM signaling scheme, as a candidate suitable for data centers’ communications. The properly chosen HPGS 8-PAM parameters for different SNR-regions allows us to closely approach the Shannon limit. We demonstrate that LPDC-coded HPGS 8-PAM outperforms both probabilistic-shaped and uniform LDPC-coded 8-PAM schemes.","PeriodicalId":431579,"journal":{"name":"2018 Asia Communications and Photonics Conference (ACP)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126141432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ACP.2018.8595928
Shuo Wang, X. Duan, Kai Liu, Yongqing Huang, X. Ren
we have designed a reflector based on the hexagonal lattice of circular two-dimensional subwavelength gratings (2D SWG), which characterize high-reflectivity, polarization-independence and the ability of focusing. The focusing reflector has designed on a silicon-on-insulator (SOI) wafer to apply in mushroom-mesa photodetector to increase bandwidth as well as efficiency simultaneously. The focusing reflector with a diameter of 16um and a focal length of 6μm has been designed, which achieves normal incident light focusing at wavelength 1550nm.
{"title":"Broadband focusing reflectors based on subwavelength gratings","authors":"Shuo Wang, X. Duan, Kai Liu, Yongqing Huang, X. Ren","doi":"10.1109/ACP.2018.8595928","DOIUrl":"https://doi.org/10.1109/ACP.2018.8595928","url":null,"abstract":"we have designed a reflector based on the hexagonal lattice of circular two-dimensional subwavelength gratings (2D SWG), which characterize high-reflectivity, polarization-independence and the ability of focusing. The focusing reflector has designed on a silicon-on-insulator (SOI) wafer to apply in mushroom-mesa photodetector to increase bandwidth as well as efficiency simultaneously. The focusing reflector with a diameter of 16um and a focal length of 6μm has been designed, which achieves normal incident light focusing at wavelength 1550nm.","PeriodicalId":431579,"journal":{"name":"2018 Asia Communications and Photonics Conference (ACP)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126197379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A photonic scheme based on sub-chirp signal splicing is proposed to achieve linear frequency modulated signal bandwidth broadening. Bandwidth broadening factor of 2 and time bandwidth product multiplication factor of 4 are achieved through experiment.
{"title":"A photonic approach for LFM bandwidth broadening based on sub-chirp signal splicing","authors":"Yirong Xu, Shangyuan Li, Xiaoxiao Xue, Xiaoping Zheng, Bingkun Zhou","doi":"10.1109/ACP.2018.8596147","DOIUrl":"https://doi.org/10.1109/ACP.2018.8596147","url":null,"abstract":"A photonic scheme based on sub-chirp signal splicing is proposed to achieve linear frequency modulated signal bandwidth broadening. Bandwidth broadening factor of 2 and time bandwidth product multiplication factor of 4 are achieved through experiment.","PeriodicalId":431579,"journal":{"name":"2018 Asia Communications and Photonics Conference (ACP)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123678321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ACP.2018.8596220
Di Han, Hu Zhang, Lixia Xi, Xiaoguang Zhang, Wenbo Zhang, Xianfeng Tang
A fiber amplifier with two-layer erbium-doped in photonic crystal fiber’s ring region was designed for orbital angular momentum mode-division multiplexing system. It can amplify 18 modes simultaneously while differential mode gain lower than 0.1dB.
{"title":"Two-layer Erbium Doped Annular Photonic Crystal Fiber Amplifier for Orbital Angular Momentum Multiplexing System","authors":"Di Han, Hu Zhang, Lixia Xi, Xiaoguang Zhang, Wenbo Zhang, Xianfeng Tang","doi":"10.1109/ACP.2018.8596220","DOIUrl":"https://doi.org/10.1109/ACP.2018.8596220","url":null,"abstract":"A fiber amplifier with two-layer erbium-doped in photonic crystal fiber’s ring region was designed for orbital angular momentum mode-division multiplexing system. It can amplify 18 modes simultaneously while differential mode gain lower than 0.1dB.","PeriodicalId":431579,"journal":{"name":"2018 Asia Communications and Photonics Conference (ACP)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115033199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ACP.2018.8596173
Yu Zhao, Sujuan Huang, Cheng Yan, Xinyu Shen
In this paper, an analysis method for mode dispersion of optical fiber is proposed, which combines the digital holographic microscopic tomography and the ray tracing theory. Based on ray tracing theory, a simulation of multimode fiber transmission is implemented, and the transmission characteristics of both perfect and defective optical fibers are analyzed. Based on digital holography, the refractive index of multi-mode fiber OM2 and OM4 is measured by the refractive index of optical fiber testing system. The transmission analysis in view of measured refractive index is performed，the mode delay and transmission characteristics are obtained.
{"title":"Mode dispersion analysis based on refractive index of graded-index multimode fiber","authors":"Yu Zhao, Sujuan Huang, Cheng Yan, Xinyu Shen","doi":"10.1109/ACP.2018.8596173","DOIUrl":"https://doi.org/10.1109/ACP.2018.8596173","url":null,"abstract":"In this paper, an analysis method for mode dispersion of optical fiber is proposed, which combines the digital holographic microscopic tomography and the ray tracing theory. Based on ray tracing theory, a simulation of multimode fiber transmission is implemented, and the transmission characteristics of both perfect and defective optical fibers are analyzed. Based on digital holography, the refractive index of multi-mode fiber OM2 and OM4 is measured by the refractive index of optical fiber testing system. The transmission analysis in view of measured refractive index is performed，the mode delay and transmission characteristics are obtained.","PeriodicalId":431579,"journal":{"name":"2018 Asia Communications and Photonics Conference (ACP)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116539242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ACP.2018.8596258
Zhihua Zhou, Jing He, Qinghui Chen, Jie Ma
A simple and efficient method based on discrete Fourier transform (DFT) to generate Nyquist signal is proposed and experimentally demonstrated in a bandwidth-limited VLC-SCFDE system. Compared to the conventional Nyquist signal shaping, the proposed method can obtain a low computation complexity as well as a significant BER performance improvement in the bandwidth-limited VLC-SCFDE system.
{"title":"A discrete Fourier transform-based method for Nyquist signal shaping in VLC-SCFDE system","authors":"Zhihua Zhou, Jing He, Qinghui Chen, Jie Ma","doi":"10.1109/ACP.2018.8596258","DOIUrl":"https://doi.org/10.1109/ACP.2018.8596258","url":null,"abstract":"A simple and efficient method based on discrete Fourier transform (DFT) to generate Nyquist signal is proposed and experimentally demonstrated in a bandwidth-limited VLC-SCFDE system. Compared to the conventional Nyquist signal shaping, the proposed method can obtain a low computation complexity as well as a significant BER performance improvement in the bandwidth-limited VLC-SCFDE system.","PeriodicalId":431579,"journal":{"name":"2018 Asia Communications and Photonics Conference (ACP)","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122561164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ACP.2018.8595937
Dongdong Zou, Fan Li, Zibin Li, Yidan Sun, Li Ding, X. Yi, Zhaohui Li, Qi Sui, Jianping Li
In this paper, we experimentally compared the performance of bit-loading discrete multi-tone (DMT) signal and discrete-Fourier-transform spread (DFT-Spread) DMT signal with pre-equalization in Intensity Modulation with Direct Detection (IM-DD) system. We first experimentally demonstrated that the bit error ratio (BER) of DFT-Spread DMT signal with optimized Quadric Curve (QC) fitting-based pre-equalization outperforms Zero-Forcing based pre-equalization in O-band over 20-km transmission utilizing directly modulated laser (DML). We also experimentally demonstrated that DFT-Spread DMT signal with optimized QC fitting pre-equalization shows better BER performance than bit-loading DMT signal in 95Gbit/s signal transmission with 19GHz bandwidth. The BER of bit-loading DMT signal and DFT-Spread DMT signal with optimized QC fitting pre-equalization after 20-km SSMF transmission at -1 dBm received optical power (ROP) are 5.8×10-3 and 1.8×10-3, respectively.
本文通过实验比较了位加载离散多音(DMT)信号和预均衡离散-傅立叶变换扩频(dft -扩频)DMT信号在直接检测强度调制(IM-DD)系统中的性能。我们首先通过实验证明，在直接调制激光(DML)的20公里传输中，基于优化的二次曲线(QC)拟合预均衡的DFT-Spread DMT信号的误码率(BER)优于基于零强迫的0波段预均衡。实验结果表明，在19GHz带宽下，采用优化QC拟合预均衡的DFT-Spread DMT信号在95Gbit/s的传输中，其误码率优于单位DMT信号。以-1 dBm接收光功率(ROP)传输20 km SSMF后，位加载DMT信号和优化QC拟合预均衡DMT信号的误码率分别为5.8×10-3和1.8×10-3。
{"title":"Comparision of Bit-loading and DFT-Spread DMT Signal Transmission in O-band IM/DD System utilizing DML","authors":"Dongdong Zou, Fan Li, Zibin Li, Yidan Sun, Li Ding, X. Yi, Zhaohui Li, Qi Sui, Jianping Li","doi":"10.1109/ACP.2018.8595937","DOIUrl":"https://doi.org/10.1109/ACP.2018.8595937","url":null,"abstract":"In this paper, we experimentally compared the performance of bit-loading discrete multi-tone (DMT) signal and discrete-Fourier-transform spread (DFT-Spread) DMT signal with pre-equalization in Intensity Modulation with Direct Detection (IM-DD) system. We first experimentally demonstrated that the bit error ratio (BER) of DFT-Spread DMT signal with optimized Quadric Curve (QC) fitting-based pre-equalization outperforms Zero-Forcing based pre-equalization in O-band over 20-km transmission utilizing directly modulated laser (DML). We also experimentally demonstrated that DFT-Spread DMT signal with optimized QC fitting pre-equalization shows better BER performance than bit-loading DMT signal in 95Gbit/s signal transmission with 19GHz bandwidth. The BER of bit-loading DMT signal and DFT-Spread DMT signal with optimized QC fitting pre-equalization after 20-km SSMF transmission at -1 dBm received optical power (ROP) are 5.8×10-3 and 1.8×10-3, respectively.","PeriodicalId":431579,"journal":{"name":"2018 Asia Communications and Photonics Conference (ACP)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122978701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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