The athermal all-polymer waveguide microring resonator is realized by selecting polymer substrate with proper thermal expansion coefficient to substitute the silicon one. The designed results show that the maximal resonant wavelength shift is −0.0085nm and the maximal temperature dependent wavelength shift slope is −0.0009nm/K when the temperature varies from 20°C to 65°C.
{"title":"Design of athermal all-polymer waveguide microring resonator*","authors":"Xiuyou Han, Mingshan Zhao, Jianing Zhang, Linghua Wang, J. Teng, Jinyan Wang, X. Jian","doi":"10.1364/ACP.2009.THN5","DOIUrl":"https://doi.org/10.1364/ACP.2009.THN5","url":null,"abstract":"The athermal all-polymer waveguide microring resonator is realized by selecting polymer substrate with proper thermal expansion coefficient to substitute the silicon one. The designed results show that the maximal resonant wavelength shift is −0.0085nm and the maximal temperature dependent wavelength shift slope is −0.0009nm/K when the temperature varies from 20°C to 65°C.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"303 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132874896","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 recognition method based on the gait characteristic for walking intrusion signal is presented. The vibration signal caused by a walker is intermittent and periodical. This signal characteristic can distinguish a human intrusion from an animal and other random disturbance. The experimental results verified the effectiveness of the proposed method.
{"title":"Walking intrusion signal recognition method for fiber fence system","authors":"N. Fang, Lutang Wang, Dongjian Jia, Chao Shang","doi":"10.1364/ACP.2009.WL96","DOIUrl":"https://doi.org/10.1364/ACP.2009.WL96","url":null,"abstract":"A recognition method based on the gait characteristic for walking intrusion signal is presented. The vibration signal caused by a walker is intermittent and periodical. This signal characteristic can distinguish a human intrusion from an animal and other random disturbance. The experimental results verified the effectiveness of the proposed method.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131294544","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}
Broadband integrated Er-Yb doped phosphate glass waveguide amplifier based on cascaded long-period waveguide grating is proposed. The effect of transmittance spectrum of the proposed cascaded long-period waveguide grating on flattening gain is discussed. The transmission function of the cascaded long-period waveguide grating is obtained.
{"title":"Optimal design of cascaded long-period waveguide grating equalizer for broadband Er-Yb co-doped phosphate glass waveguide amplifiers","authors":"Hai-yan Chen","doi":"10.1364/ACP.2009.FP3","DOIUrl":"https://doi.org/10.1364/ACP.2009.FP3","url":null,"abstract":"Broadband integrated Er-Yb doped phosphate glass waveguide amplifier based on cascaded long-period waveguide grating is proposed. The effect of transmittance spectrum of the proposed cascaded long-period waveguide grating on flattening gain is discussed. The transmission function of the cascaded long-period waveguide grating is obtained.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128383265","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}
Current trends in communications indicate that multicasting is becoming increasingly popular and important in networking applications. Since multicasting can be supported more efficiently in optical domain by utilizing the inherent light-splitting capacity of optical devices, such as optical splitters, than by copying data in electronic domain, issues concerning running multicast sessions in the all-optical networks have received much attention in recent years. In this paper, different multicasting schemes and their performance in the Optical Packet Switched networks are investigated, including the parallel mode, serial mode, and hybrid mode multicasting schemes. Computer simulation results show that compared with the parallel-mode and serial-mode multicasting schemes, hybrid-mode multicasting scheme is the best way to deliver multicast sessions in the Optical Packet Switched networks due to its highest performance.
{"title":"High-performance multicasting schemes in Optical Packet Switched networks","authors":"Yuefeng Ji, Xin Liu, Jie Zhang, M. Zhang","doi":"10.1364/ACP.2009.THFF1","DOIUrl":"https://doi.org/10.1364/ACP.2009.THFF1","url":null,"abstract":"Current trends in communications indicate that multicasting is becoming increasingly popular and important in networking applications. Since multicasting can be supported more efficiently in optical domain by utilizing the inherent light-splitting capacity of optical devices, such as optical splitters, than by copying data in electronic domain, issues concerning running multicast sessions in the all-optical networks have received much attention in recent years. In this paper, different multicasting schemes and their performance in the Optical Packet Switched networks are investigated, including the parallel mode, serial mode, and hybrid mode multicasting schemes. Computer simulation results show that compared with the parallel-mode and serial-mode multicasting schemes, hybrid-mode multicasting scheme is the best way to deliver multicast sessions in the Optical Packet Switched networks due to its highest performance.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128832408","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 novel soluble zinc phthalocyanine derivative was synthesized and characterized by infrared (IR) and electronic absorption spectra. Current-voltage characteristics of the films were measured and photoconductivity was increased by an order of magnitude compared with dark conductivity, which indicates the product is a promising functional material for photovoltaic cells.
{"title":"Synthesis and photoelectrical properties of Zinc phthalocyanine-bisphenol a epoxy derivative","authors":"Wanxi Cheng, Yue Shen, Fei Zheng, Feng Gu, Jiangcheng Zhang","doi":"10.1364/ACP.2009.WL49","DOIUrl":"https://doi.org/10.1364/ACP.2009.WL49","url":null,"abstract":"A novel soluble zinc phthalocyanine derivative was synthesized and characterized by infrared (IR) and electronic absorption spectra. Current-voltage characteristics of the films were measured and photoconductivity was increased by an order of magnitude compared with dark conductivity, which indicates the product is a promising functional material for photovoltaic cells.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124144456","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}
Jianfeng Lin, Zhuohong Feng, Lin Lin, Kehua Shi, Zhiqiang Zheng
The absorption spectrum, upconversion spectrum and the fluorescence decay curve of Er3+/Yb3+ co-doped KY(WO4)2 crystal were measured. The radiative transition rates were calculated by Judd-Ofelt theory. A model for the dynamics of frequency upconversion process in Er3+/Yb3+ co-doped KY(WO4)2 crystal was proposed. The Yb-to-Er energy transfer rate and the upconversion coefficients were estimated by numerically solving the rate equations and fitting simulated curve to the experimental data.
{"title":"Analysis of the dynamics of frequency upconversion in Er3+/Yb3+ co-doped KY(WO4)2 crystal","authors":"Jianfeng Lin, Zhuohong Feng, Lin Lin, Kehua Shi, Zhiqiang Zheng","doi":"10.1364/ACP.2009.WL47","DOIUrl":"https://doi.org/10.1364/ACP.2009.WL47","url":null,"abstract":"The absorption spectrum, upconversion spectrum and the fluorescence decay curve of Er<sup>3+</sup>/Yb<sup>3+</sup> co-doped KY(WO<inf>4</inf>)<inf>2</inf> crystal were measured. The radiative transition rates were calculated by Judd-Ofelt theory. A model for the dynamics of frequency upconversion process in Er<sup>3+</sup>/Yb<sup>3+</sup> co-doped KY(WO<inf>4</inf>)<inf>2</inf> crystal was proposed. The Yb-to-Er energy transfer rate and the upconversion coefficients were estimated by numerically solving the rate equations and fitting simulated curve to the experimental data.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122759698","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. Ortega-Moñux, Í. Molina-Fernández, J. G. Gangüemert-Pérez
We propose a technique to improve the performance of high index contrast Multimode Interference couplers. It is shown that imaging errors can be almost completely removed if the refractive index profile of the multimode region is properly designed. Optimized devices exhibit very low excess losses, power imbalance and phase errors.
{"title":"Index profile engineering of Multimode Interference couplers","authors":"A. Ortega-Moñux, Í. Molina-Fernández, J. G. Gangüemert-Pérez","doi":"10.1364/ACP.2009.WI2","DOIUrl":"https://doi.org/10.1364/ACP.2009.WI2","url":null,"abstract":"We propose a technique to improve the performance of high index contrast Multimode Interference couplers. It is shown that imaging errors can be almost completely removed if the refractive index profile of the multimode region is properly designed. Optimized devices exhibit very low excess losses, power imbalance and phase errors.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116844949","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}
J. Pello, T. Le, A. Lim, E. Dogheche, M. Kaba, K. Pita, D. Decoster, J. Huignard, S. Tjin, J. Chazelas
In this paper, we demonstrate that a prism coupling characterization technique can lead to simpler Waveguide Bragg Grating (WBG) designs and easier fabrication process by avoiding channel transmission. The experimental results have shown that the incident laser beam's collimation was maintained after coupling to a planar waveguide. A characterization set-up using two prisms was designed for measuring transmission characteristics of integrated structures and eventually planar waveguides in the visible or in the IR range. Since a reasonable overall optical efficiency of 10% has been demonstrated for this set-up, the prism approach can be eventually utilized in Bragg Grating structures characterization.
{"title":"Novel approach for planar Bragg grating characterization using prism coupling","authors":"J. Pello, T. Le, A. Lim, E. Dogheche, M. Kaba, K. Pita, D. Decoster, J. Huignard, S. Tjin, J. Chazelas","doi":"10.1364/ACP.2009.TUP3","DOIUrl":"https://doi.org/10.1364/ACP.2009.TUP3","url":null,"abstract":"In this paper, we demonstrate that a prism coupling characterization technique can lead to simpler Waveguide Bragg Grating (WBG) designs and easier fabrication process by avoiding channel transmission. The experimental results have shown that the incident laser beam's collimation was maintained after coupling to a planar waveguide. A characterization set-up using two prisms was designed for measuring transmission characteristics of integrated structures and eventually planar waveguides in the visible or in the IR range. Since a reasonable overall optical efficiency of 10% has been demonstrated for this set-up, the prism approach can be eventually utilized in Bragg Grating structures characterization.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127275388","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}
The simulation model to bistable characteristics of grating is established by numerically solving the nonlinear coupled-mode equations of Fiber Bragg Grating using 3-stage 4-order semi-implicit Runge - Kutta method. The impact of the grating parameters and operating point on S-shaped hysteresis loop parameters is researched. The results show that the area of S-shaped hysteresis loop, bistable operating condition, bistable threshold and dynamic range can be adjusted by changing the operating wavelength and grating parameters, such as grating length, grating apodization and average refractive index modulation depth of grating.
{"title":"Study on characteristics of optical bistable devices based on Fiber Bragg Grating","authors":"Yongjun Peng, K. Qiu, Baojian Wu, Siwei Ji","doi":"10.1364/ACP.2009.WL12","DOIUrl":"https://doi.org/10.1364/ACP.2009.WL12","url":null,"abstract":"The simulation model to bistable characteristics of grating is established by numerically solving the nonlinear coupled-mode equations of Fiber Bragg Grating using 3-stage 4-order semi-implicit Runge - Kutta method. The impact of the grating parameters and operating point on S-shaped hysteresis loop parameters is researched. The results show that the area of S-shaped hysteresis loop, bistable operating condition, bistable threshold and dynamic range can be adjusted by changing the operating wavelength and grating parameters, such as grating length, grating apodization and average refractive index modulation depth of grating.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"2009-Supplement 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131392847","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}
We present fabrication and characterization of 1.3-µm InAs quantum dot (QD) vertical cavity surface emitting lasers (VCSELs) and QD-VCSEL arrays. The continuous-wave (CW) output power of single QD-VCSEL of 1.2 mW with lasing wavelength of 1.28 µm is obtained at room temperature (RT) at a bias current of 15 mA without power saturation. The low threshold current of 1.1 mA can be achieved for the single mode device. We investigate the 3-dB modulation bandwidth of QD-VCSELs with oxide aperture size of 5-µm, 10-µm and 15-µm in the small signal frequency response measurements. Modulation bandwidth of 2.65 GHz is achieved for single-mode QD-VCSEL with oxide aperture size of 5 µm at a bias current of 4.5 mA. The maximum modulation bandwidth of 2.5 GHz can be obtained for multimode QD-VCSEL with oxide aperture size of 10 µm at a bias current of 7 mA. The 61 QD-VCSELs array is also investigated at RT without optimization. Maximum CW output power of 28 mW and pulsed output power of 18 mW are demonstrated for 2-D QD-VCSEL array with threshold current of 50 mA. The far field pattern beam angle of QD-VCSEL arrays at two perpendicular directions are about 18 degree.
{"title":"Fabrication and characterization of 1.3-µm InAs quantum-dot VCSELs and monolithic VCSEL arrays","authors":"Y. Ding, W. Fan, D. Xu, L. Zhao, Y. Liu, N. Zhu","doi":"10.1364/ACP.2009.TUB2","DOIUrl":"https://doi.org/10.1364/ACP.2009.TUB2","url":null,"abstract":"We present fabrication and characterization of 1.3-µm InAs quantum dot (QD) vertical cavity surface emitting lasers (VCSELs) and QD-VCSEL arrays. The continuous-wave (CW) output power of single QD-VCSEL of 1.2 mW with lasing wavelength of 1.28 µm is obtained at room temperature (RT) at a bias current of 15 mA without power saturation. The low threshold current of 1.1 mA can be achieved for the single mode device. We investigate the 3-dB modulation bandwidth of QD-VCSELs with oxide aperture size of 5-µm, 10-µm and 15-µm in the small signal frequency response measurements. Modulation bandwidth of 2.65 GHz is achieved for single-mode QD-VCSEL with oxide aperture size of 5 µm at a bias current of 4.5 mA. The maximum modulation bandwidth of 2.5 GHz can be obtained for multimode QD-VCSEL with oxide aperture size of 10 µm at a bias current of 7 mA. The 61 QD-VCSELs array is also investigated at RT without optimization. Maximum CW output power of 28 mW and pulsed output power of 18 mW are demonstrated for 2-D QD-VCSEL array with threshold current of 50 mA. The far field pattern beam angle of QD-VCSEL arrays at two perpendicular directions are about 18 degree.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132041976","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：