Starting from the structure of graphene, the electrical and optical properties of graphene is analyzed in this paper. Then, the transmission characteristics and the modulation for the optical pulses are discussed with the graphene waveguide model. Finally, the graphene based on the mode-locked fiber laser system is simulated, thereafter the role played by graphene will be found.
{"title":"The graphene mode-locked fiber laser","authors":"Shili Guo, Aiying Yang, Yvnan Sun","doi":"10.1117/12.903899","DOIUrl":"https://doi.org/10.1117/12.903899","url":null,"abstract":"Starting from the structure of graphene, the electrical and optical properties of graphene is analyzed in this paper. Then, the transmission characteristics and the modulation for the optical pulses are discussed with the graphene waveguide model. Finally, the graphene based on the mode-locked fiber laser system is simulated, thereafter the role played by graphene will be found.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"376 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122436818","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}
Optical responses in Bi-layer metallic nanowire grating are investigated. There are two kinds of Surface Plasmon resonances: lateral propagating Surface Plasmon waveguide modes excited by the diffraction of the grating which lead to dips in transmission; Surface Plasmon resonance between the slits of the grating, which leads to high extinction ration of TM to TE transmission. With simultaneous resonances, a compacted device of integrated color filter and polarizer can be achieved. In order to improve the transmission of TM light, an undercut structure is proposed. The mechanism of the enhancement is analyzed. Bi-layer metallic nanowire gratings are fabricated by laser interference lithography and subsequent E-beam deposition. The measured transmission and reflection spectra confirmed the theoretical and numerical simulations. The results will have wide potential applications in Displays, Optical communication, and integrated Optics.
{"title":"Design and fabrication of bilayer metallic nanowire polarizers and color filters based on surface plasmon and waveguide mode resonances","authors":"Zhicheng Ye, Jun Zheng, Chenchen Zhang, Shuo Sun","doi":"10.1117/12.904042","DOIUrl":"https://doi.org/10.1117/12.904042","url":null,"abstract":"Optical responses in Bi-layer metallic nanowire grating are investigated. There are two kinds of Surface Plasmon resonances: lateral propagating Surface Plasmon waveguide modes excited by the diffraction of the grating which lead to dips in transmission; Surface Plasmon resonance between the slits of the grating, which leads to high extinction ration of TM to TE transmission. With simultaneous resonances, a compacted device of integrated color filter and polarizer can be achieved. In order to improve the transmission of TM light, an undercut structure is proposed. The mechanism of the enhancement is analyzed. Bi-layer metallic nanowire gratings are fabricated by laser interference lithography and subsequent E-beam deposition. The measured transmission and reflection spectra confirmed the theoretical and numerical simulations. The results will have wide potential applications in Displays, Optical communication, and integrated Optics.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134334689","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}
M. Ding, M. Belal, George Y. Chen, Rand Al-Azawi, Timothy Lee, Yongmin Jung, Pengfei Wang, Xueliang Zhang, Zhanqgi Song, Fei Xu, R. Lorenzi, T. Newson, G. Brambilla
A review of passive devices and sensors manufactured from optical fiber microwires at the Optoelectronics Research Centre (University of Southampton) is presented.
本文综述了南安普顿大学光电子研究中心(光电子学研究中心)用光纤微线制造的无源器件和传感器。
{"title":"Optical microfiber passive devices and sensors","authors":"M. Ding, M. Belal, George Y. Chen, Rand Al-Azawi, Timothy Lee, Yongmin Jung, Pengfei Wang, Xueliang Zhang, Zhanqgi Song, Fei Xu, R. Lorenzi, T. Newson, G. Brambilla","doi":"10.1117/12.902602","DOIUrl":"https://doi.org/10.1117/12.902602","url":null,"abstract":"A review of passive devices and sensors manufactured from optical fiber microwires at the Optoelectronics Research Centre (University of Southampton) is presented.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128835945","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}
Su Juan, Xiaopeng Dong, G. Lin, Jiajian Hao, Zhi-dong Shi
Influence of splicing the highly birefringent photonic crystal fiber (HB-PCF) with single mode fiber (SMF) under two different experimental conditions is studied in details. The result shows the birefringence of the HB-PCF can be either increased or decreased significantly, depending on the connection conditions of the HB-PCF end, which are classified as case I (the end is closely butted by another fiber) and case II (the end is in open air). From the experiment and theoretical analysis, it has shown that in case I the retardation change of the spliced section of HB-PCF with 0.2mm in length can be 3.2 times larger than the original value. However, in case II the retardation may be reduced to 72.12% of the original one. The obtained result is important for the design and fabrication of optical fiber devices and sensors based on HB-PCFs.
{"title":"Influence of the splicing on the birefrengence characteristics of the highly birefringent photonic crystal fiber","authors":"Su Juan, Xiaopeng Dong, G. Lin, Jiajian Hao, Zhi-dong Shi","doi":"10.1117/12.891042","DOIUrl":"https://doi.org/10.1117/12.891042","url":null,"abstract":"Influence of splicing the highly birefringent photonic crystal fiber (HB-PCF) with single mode fiber (SMF) under two different experimental conditions is studied in details. The result shows the birefringence of the HB-PCF can be either increased or decreased significantly, depending on the connection conditions of the HB-PCF end, which are classified as case I (the end is closely butted by another fiber) and case II (the end is in open air). From the experiment and theoretical analysis, it has shown that in case I the retardation change of the spliced section of HB-PCF with 0.2mm in length can be 3.2 times larger than the original value. However, in case II the retardation may be reduced to 72.12% of the original one. The obtained result is important for the design and fabrication of optical fiber devices and sensors based on HB-PCFs.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132592135","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}
Wenyuan Wang, F. Pang, Na Chen, Xiaobei Zhang, Lugang Lan, Ding Ding, Tingyun Wang
A fiber-optic intrinsic Fabry-Perot (F-P) interferometric sensor was inscribed in a standard single mode fiber by inducing refractive index change in the core. It was written directly by using a femtosecond laser. The reflection spectrum of the fiber-optic F-P interferometric sensor was measured and was investigated as a temperature sensor. The sensitivity of the sensor is 9.2 pm/°C in the temperature range of -20~80°C.
{"title":"Fiber optic intrinsic Fabry-Perot temperature sensor fabricated by femtosecond lasers","authors":"Wenyuan Wang, F. Pang, Na Chen, Xiaobei Zhang, Lugang Lan, Ding Ding, Tingyun Wang","doi":"10.1117/12.888534","DOIUrl":"https://doi.org/10.1117/12.888534","url":null,"abstract":"A fiber-optic intrinsic Fabry-Perot (F-P) interferometric sensor was inscribed in a standard single mode fiber by inducing refractive index change in the core. It was written directly by using a femtosecond laser. The reflection spectrum of the fiber-optic F-P interferometric sensor was measured and was investigated as a temperature sensor. The sensitivity of the sensor is 9.2 pm/°C in the temperature range of -20~80°C.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125941970","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}
Qiang Wu, Y. Semenova, Pengfei Wang, A. Hatta, G. Farrell
We report an experimental study of a SMS fiber sensor for simultaneously measuring both displacement and temperature. By measuring both central wavelength spectral shifts and peak power variations, displacement and temperature can be independently determined with a demonstrated sensitivity to displacement of 0.62 μm and a temperature sensitivity of 1 °C by using a typical OSA which has a wavelength resolution of 10 pm and power measurement resolution of 0.01 dB.
{"title":"Simultaneous measurement of displacement and temperature with a single singlemode-multimode-singlemode (SMS) fiber structure","authors":"Qiang Wu, Y. Semenova, Pengfei Wang, A. Hatta, G. Farrell","doi":"10.1117/12.888127","DOIUrl":"https://doi.org/10.1117/12.888127","url":null,"abstract":"We report an experimental study of a SMS fiber sensor for simultaneously measuring both displacement and temperature. By measuring both central wavelength spectral shifts and peak power variations, displacement and temperature can be independently determined with a demonstrated sensitivity to displacement of 0.62 μm and a temperature sensitivity of 1 °C by using a typical OSA which has a wavelength resolution of 10 pm and power measurement resolution of 0.01 dB.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"34 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125613494","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}
Yongli Zhao, Jie Zhang, M. Zhang, Yuefeng Ji, W. Gu
With the development of large scale multi-layer and multi-domain optical networks, path computation becomes more complicated as complex policies and constraints are to be considered and dynamic routing becomes one of the key issues in GMPLS/ASON networks. A novel Dual Routing Engine Architecture in Multi-layer and multi-domain Scalable and Constraint-Aware Policy-Enabled optical networks (DREAMSCAPE), exploiting the advantages of both GMPLS control plane and Path Computation Element (PCE), is introduced to improve the performance of routing in multi-layer and multi-domain optical networks in this paper. In the architecture, the cooperation of Group Engine (GE) and Unit Engine (UE) makes it effective to optimize path computation especially under complex multi-constraints. The functional architectures of dual routing engines are described in the paper. Based on this novel architecture, a testbed with more than 1000 GMPLS-based control nodes has been built in our lab using virtual machine technology, and two path computation approaches have been implemented on the testbed. The latest results are experimentally demonstrated on the testbed, and some future research issues are presented in the conclusion.
{"title":"Experimental demonstration of DREAMSCAPE with more than 1000 GMPLS-based control nodes","authors":"Yongli Zhao, Jie Zhang, M. Zhang, Yuefeng Ji, W. Gu","doi":"10.1117/12.888282","DOIUrl":"https://doi.org/10.1117/12.888282","url":null,"abstract":"With the development of large scale multi-layer and multi-domain optical networks, path computation becomes more complicated as complex policies and constraints are to be considered and dynamic routing becomes one of the key issues in GMPLS/ASON networks. A novel Dual Routing Engine Architecture in Multi-layer and multi-domain Scalable and Constraint-Aware Policy-Enabled optical networks (DREAMSCAPE), exploiting the advantages of both GMPLS control plane and Path Computation Element (PCE), is introduced to improve the performance of routing in multi-layer and multi-domain optical networks in this paper. In the architecture, the cooperation of Group Engine (GE) and Unit Engine (UE) makes it effective to optimize path computation especially under complex multi-constraints. The functional architectures of dual routing engines are described in the paper. Based on this novel architecture, a testbed with more than 1000 GMPLS-based control nodes has been built in our lab using virtual machine technology, and two path computation approaches have been implemented on the testbed. The latest results are experimentally demonstrated on the testbed, and some future research issues are presented in the conclusion.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115819015","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}
Y. Wang, J. Hou, C. Xiong, Y. Peng, R. Song, B. Eggleton, Q. Lu
we propose the improved dual-wavelengthpumped scheme based on the former work (C.Xiong et al, Journal of lightwave tech. 27, 1638-1643(2009)), which can obviously increase the power at the visible wavelengths and effectively improve the flatness of spectra by solving the Generalized Nonlinear Schrödinger Equation with the adaptive split-step Fourier method and simulating supercontinuum generation.
我们在前人的基础上提出了改进的双波长泵浦方案(C.Xiong et al .， Journal of lightwave technology . 27, 1638-1643(2009))，该方案采用自适应分步傅立叶方法求解广义非线性Schrödinger方程，模拟超连续介质的产生，可以明显提高可见光波长的功率，有效提高光谱的平坦度。
{"title":"Improved dual-wavelength-pumped supercontinuum generation in an all-fiber device","authors":"Y. Wang, J. Hou, C. Xiong, Y. Peng, R. Song, B. Eggleton, Q. Lu","doi":"10.1117/12.889275","DOIUrl":"https://doi.org/10.1117/12.889275","url":null,"abstract":"we propose the improved dual-wavelengthpumped scheme based on the former work (C.Xiong et al, Journal of lightwave tech. 27, 1638-1643(2009)), which can obviously increase the power at the visible wavelengths and effectively improve the flatness of spectra by solving the Generalized Nonlinear Schrödinger Equation with the adaptive split-step Fourier method and simulating supercontinuum generation.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132280581","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}
Polarization mode dispersion is considered to be one of the main obstacles for high speed long-haul optical fiber communication systems. It is necessary to realize PMD monitoring. This paper theoretically analyzed the principle of polarization mode dispersion monitoring with degree of polarization as monitoring signal. Using the degree of polarization method, the scheme of DSP based high precision real-time inline PMD monitoring is designed and implemented. An experiment system is set up to monitor polarization mode dispersion of 40Gbit/s DQPSK system. The experiment results show that the range of input optical power is -20~0dBm, the response time is 1μs and the states of polarization accuracy degree is 1%. It has high sensitivity and can be used in a variety of modulation formats and it is independent of optical signal rate.
{"title":"DSP-based high precision real-time inline PMD monitoring","authors":"X. Yuan, Yang'an Zhang, Minglun Zhang, Jinnan Zhang, Yongqing Huang","doi":"10.1117/12.888567","DOIUrl":"https://doi.org/10.1117/12.888567","url":null,"abstract":"Polarization mode dispersion is considered to be one of the main obstacles for high speed long-haul optical fiber communication systems. It is necessary to realize PMD monitoring. This paper theoretically analyzed the principle of polarization mode dispersion monitoring with degree of polarization as monitoring signal. Using the degree of polarization method, the scheme of DSP based high precision real-time inline PMD monitoring is designed and implemented. An experiment system is set up to monitor polarization mode dispersion of 40Gbit/s DQPSK system. The experiment results show that the range of input optical power is -20~0dBm, the response time is 1μs and the states of polarization accuracy degree is 1%. It has high sensitivity and can be used in a variety of modulation formats and it is independent of optical signal rate.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116959584","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}
Haiping Shen, Xiaoli Zhou, Wanlu Zhang, Muqing Liu
The relationship between the reliability of GaN LEDs and their junction temperatures and ideal factors is investigated. 20 groups of both blue and white GaN LEDs are tested. Their ideal factors and junction temperatures under 700mA operating current are measured. The measurement methods are introduced. After the measurement, 700mA high current accelerated life test is carried out on the LEDs. Analysis results show that the reliability of the LEDs is strongly dependent on their junction temperatures and ideal factors. For most of the unreliable LEDs with their 50% ALT life less than 400 hours, their ideal factors are higher than 10, or the junction temperatures of the blue LEDs under 700mA are higher than 130°C, and the junction temperatures of the white LEDs under 700mA are higher than 120°C.
{"title":"Dependence of reliability of GaN LEDs on their junction temperatures and ideal factors","authors":"Haiping Shen, Xiaoli Zhou, Wanlu Zhang, Muqing Liu","doi":"10.1117/12.888644","DOIUrl":"https://doi.org/10.1117/12.888644","url":null,"abstract":"The relationship between the reliability of GaN LEDs and their junction temperatures and ideal factors is investigated. 20 groups of both blue and white GaN LEDs are tested. Their ideal factors and junction temperatures under 700mA operating current are measured. The measurement methods are introduced. After the measurement, 700mA high current accelerated life test is carried out on the LEDs. Analysis results show that the reliability of the LEDs is strongly dependent on their junction temperatures and ideal factors. For most of the unreliable LEDs with their 50% ALT life less than 400 hours, their ideal factors are higher than 10, or the junction temperatures of the blue LEDs under 700mA are higher than 130°C, and the junction temperatures of the white LEDs under 700mA are higher than 120°C.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125662937","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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