In 40-Gb/s optical systems, it is impossible to neglect the electronic dispersion of polarization-mode dispersion (PMD). As the data rate is increased, the maximum useful length of the fiber decreases according to the square of the increase. With the development of VLSI and DSP technologies, the electronic dispersion compensation for optical network has aroused greater world attention. In this paper, the performance of decision feedback equalizer (DFE) in PMD-limited 40-GB/s optical links is analyzed by using Matlab/Simulink. A simple equalizer circuit, in fold-cascade traveling-wave filter topology, is presented and the results based on S-parameter simulations show that a DFE equalizer consisting of a 3-tap feed forward equalizer (FFE) and a 2-tap feed back equalizer (FBE) can mitigate PMD effectively.
{"title":"Electronic dispersion compensation for PMD in 40-GB/s optical links","authors":"Kang Yang, Jianfei Liu, Xiangye Zeng","doi":"10.1364/ACP.2009.WL46","DOIUrl":"https://doi.org/10.1364/ACP.2009.WL46","url":null,"abstract":"In 40-Gb/s optical systems, it is impossible to neglect the electronic dispersion of polarization-mode dispersion (PMD). As the data rate is increased, the maximum useful length of the fiber decreases according to the square of the increase. With the development of VLSI and DSP technologies, the electronic dispersion compensation for optical network has aroused greater world attention. In this paper, the performance of decision feedback equalizer (DFE) in PMD-limited 40-GB/s optical links is analyzed by using Matlab/Simulink. A simple equalizer circuit, in fold-cascade traveling-wave filter topology, is presented and the results based on S-parameter simulations show that a DFE equalizer consisting of a 3-tap feed forward equalizer (FFE) and a 2-tap feed back equalizer (FBE) can mitigate PMD effectively.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"148 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":"132018620","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 wavelength tunable polarization OTDR utilizing a semiconductor optical amplifier for the received signal amplification is proposed in order to realize stable operation. Measurement experiments are carried out for a fiber link with a length of 5.7km and the state of polarization change along the fiber link is successfully estimated.
{"title":"Experimental demonstration of a wavelength tunable polarization OTDR using a SOA for received signal amplification","authors":"I. Yamashita, M. Ohashi","doi":"10.1364/ACP.2009.TUQ2","DOIUrl":"https://doi.org/10.1364/ACP.2009.TUQ2","url":null,"abstract":"A wavelength tunable polarization OTDR utilizing a semiconductor optical amplifier for the received signal amplification is proposed in order to realize stable operation. Measurement experiments are carried out for a fiber link with a length of 5.7km and the state of polarization change along the fiber link is successfully estimated.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"43 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":"133806098","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 demonstrate the fabrication of a kind of asymmetrical twin core fiber, which is easy spliced with standard single mode fiber. This fiber is designed to be used for passive mode-locking in fiber lasers.
我们演示了一种易于与标准单模光纤拼接的非对称双芯光纤的制备。该光纤设计用于光纤激光器的被动锁模。
{"title":"Fabrication and design of asymmetrical twin core fiber for passive mode-locking","authors":"Lei Yao, S. Lou, Lisong Liu, Jian Peng, S. Jian","doi":"10.1364/ACP.2009.THJ4","DOIUrl":"https://doi.org/10.1364/ACP.2009.THJ4","url":null,"abstract":"We demonstrate the fabrication of a kind of asymmetrical twin core fiber, which is easy spliced with standard single mode fiber. This fiber is designed to be used for passive mode-locking in fiber lasers.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"44 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":"121551531","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}
Hye Won Kim, Young Man Kim, Sung-Keun Yoo, S. Y. Yoon, Jong Hyun Lee, Sung Yang
Conventional bead-based micro immunoassays do not guarantee high reliability because of the working principle for the trapping methods which cause inconsistency in trapping of cytometric beads. This paper presents a new bead-based micro immunoassay system for multiple or semicontinuous assays with high reliability and accuracy using hole-patterned structures and double-cladding optical fibers. Trapping test showed selective trapping of beads and consistency of the number of the trapped beads over repeated tests. Immunoassay using IL-6 showed that the cytometric beads were trapped in ordered fashion and provided a detection limit on the order of pg/ml.
{"title":"A microfluidic system for semicontinuous bead-based biosensing platforms","authors":"Hye Won Kim, Young Man Kim, Sung-Keun Yoo, S. Y. Yoon, Jong Hyun Lee, Sung Yang","doi":"10.1364/ACP.2009.WG1","DOIUrl":"https://doi.org/10.1364/ACP.2009.WG1","url":null,"abstract":"Conventional bead-based micro immunoassays do not guarantee high reliability because of the working principle for the trapping methods which cause inconsistency in trapping of cytometric beads. This paper presents a new bead-based micro immunoassay system for multiple or semicontinuous assays with high reliability and accuracy using hole-patterned structures and double-cladding optical fibers. Trapping test showed selective trapping of beads and consistency of the number of the trapped beads over repeated tests. Immunoassay using IL-6 showed that the cytometric beads were trapped in ordered fashion and provided a detection limit on the order of pg/ml.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"15 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":"115490517","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}
Chi‐Feng Chen, Yun‐Sheng Ku, T. Kung, Hau-Wei Wang, Mau-Shiun Yeh
We numerically investigate a new function modified from Hamming function to apply in weighting the waveguide structure of a mismatched optical coupler with the characteristics of low crosstalk, short length, and broad C+L-band. The full factorial design and beam propagation method are being used to seek the optimal structure parameters of coupling waveguide. This modified Hamming weighting function (M-HWF) is proved to have the superior performances to Hamming weighting function (HWF) in several ways. In theoretical computation, the M-HWF and HWF waveguides have the coupling lengths of 11 mm and 16 mm, respectively at crosstalk of −40 dB and operating wavelength of 1.57 µm. After the numerical design of waveguide structure parameters, the M-HWF also obtain a shorter coupling length of 4.50 mm than coupling length of 5.90 mm of HWF at crosstalk of −40 dB and within the C+L-band (1.53∼1.61 µm). The M-HWF waveguide with the shortest coupling length of 4.5 mm can even reach a broader bandwidth between 1.50 and 1.70 µm.
{"title":"Modified Hamming function weighted waveguide structure for the broadband and minimized mismatched optical couplers","authors":"Chi‐Feng Chen, Yun‐Sheng Ku, T. Kung, Hau-Wei Wang, Mau-Shiun Yeh","doi":"10.1364/ACP.2009.WI3","DOIUrl":"https://doi.org/10.1364/ACP.2009.WI3","url":null,"abstract":"We numerically investigate a new function modified from Hamming function to apply in weighting the waveguide structure of a mismatched optical coupler with the characteristics of low crosstalk, short length, and broad C+L-band. The full factorial design and beam propagation method are being used to seek the optimal structure parameters of coupling waveguide. This modified Hamming weighting function (M-HWF) is proved to have the superior performances to Hamming weighting function (HWF) in several ways. In theoretical computation, the M-HWF and HWF waveguides have the coupling lengths of 11 mm and 16 mm, respectively at crosstalk of −40 dB and operating wavelength of 1.57 µm. After the numerical design of waveguide structure parameters, the M-HWF also obtain a shorter coupling length of 4.50 mm than coupling length of 5.90 mm of HWF at crosstalk of −40 dB and within the C+L-band (1.53∼1.61 µm). The M-HWF waveguide with the shortest coupling length of 4.5 mm can even reach a broader bandwidth between 1.50 and 1.70 µm.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"31 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":"123811041","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}
Qiwu Wu, Jianping Wang, Xianwei Zhou, Ling-zhi Jiang, YuHong Deng
In this paper, we propose a colored multigraph model for the temporarily available wavelengths. Based on this colored multigraph model, a polynomial time algorithm with complexity O(N2) is also proposed to develop an integrated dynamic routing and wavelength assignment, where N is the number of nodes in a WDM network.
{"title":"A novel routing and wavelength assignment algorithm based on colored multigraph model in WDM networks","authors":"Qiwu Wu, Jianping Wang, Xianwei Zhou, Ling-zhi Jiang, YuHong Deng","doi":"10.1364/acp.2009.wl75","DOIUrl":"https://doi.org/10.1364/acp.2009.wl75","url":null,"abstract":"In this paper, we propose a colored multigraph model for the temporarily available wavelengths. Based on this colored multigraph model, a polynomial time algorithm with complexity O(N2) is also proposed to develop an integrated dynamic routing and wavelength assignment, where N is the number of nodes in a WDM network.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"42 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":"124746982","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 report a radially polarized coherent anti-Stokes Raman scattering (CARS) microscopy to facilitate longitudinally oriented molecules detection. We demonstrate that combining both the radially and linearly polarized excitation schemes, CARS microscopy can be a very powerful tool for identifying the 3-D orientations of molecules with high sensitivity and chemical specificity.
{"title":"Coherent anti-Stokes Raman scattering microscopy for sensing molecular orientations","authors":"Fake Lu, Wei Zheng, Zhiwei Huang","doi":"10.1364/ACP.2009.FV2","DOIUrl":"https://doi.org/10.1364/ACP.2009.FV2","url":null,"abstract":"We report a radially polarized coherent anti-Stokes Raman scattering (CARS) microscopy to facilitate longitudinally oriented molecules detection. We demonstrate that combining both the radially and linearly polarized excitation schemes, CARS microscopy can be a very powerful tool for identifying the 3-D orientations of molecules with high sensitivity and chemical specificity.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"52 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":"124366799","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 multiple-frequency Brillouin fiber-ring laser is proposed and experimentally demonstrated. Based on this laser, the mechanism for the generation of high frequency microwave signal is proposed and partly realized. To confirm the feasibility of this method, a 11GHz microwave signal is obtained through the experiment.
{"title":"A novel technique to generate microwave signal based on multiple-frequency brillouin fiber-ring laser","authors":"Ying Shen, Rong Wang, T. Pu","doi":"10.1364/ACP.2009.WL5","DOIUrl":"https://doi.org/10.1364/ACP.2009.WL5","url":null,"abstract":"A novel multiple-frequency Brillouin fiber-ring laser is proposed and experimentally demonstrated. Based on this laser, the mechanism for the generation of high frequency microwave signal is proposed and partly realized. To confirm the feasibility of this method, a 11GHz microwave signal is obtained through the experiment.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"1 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":"130957455","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}
Ying Han, L. Hou, Yanyan Guo, Shuguang Li, Xing-tao Zhao, Zhao-yuan Song
A spectrometer is used to measure numerical aperture (NA) of photonic crystal fibers (PCFs), and the high-precision result is obtained. We get the NA at any wavelength in 500∼900nm range, which is determined by light source and spectrometer. The measured results and theoretical calculation value match very well.
{"title":"Novel technique for the measurement of photonic crystal fiber numerical aperture properties","authors":"Ying Han, L. Hou, Yanyan Guo, Shuguang Li, Xing-tao Zhao, Zhao-yuan Song","doi":"10.1364/ACP.2009.WL6","DOIUrl":"https://doi.org/10.1364/ACP.2009.WL6","url":null,"abstract":"A spectrometer is used to measure numerical aperture (NA) of photonic crystal fibers (PCFs), and the high-precision result is obtained. We get the NA at any wavelength in 500∼900nm range, which is determined by light source and spectrometer. The measured results and theoretical calculation value match very well.","PeriodicalId":366119,"journal":{"name":"2009 Asia Communications and Photonics conference and Exhibition (ACP)","volume":"1 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":"129253216","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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