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All-solid photonic bandgap fiber gratings 全固体光子带隙光纤光栅
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888615
Yan-ge Liu, Zhi Wang, Boyan Tai, Jianbo Xu
{"title":"All-solid photonic bandgap fiber gratings","authors":"Yan-ge Liu, Zhi Wang, Boyan Tai, Jianbo Xu","doi":"10.1117/12.888615","DOIUrl":"https://doi.org/10.1117/12.888615","url":null,"abstract":"In this paper, we review advances and our works in all-solid photonic bandgap fiber gratings. Especially, we report the fabrication and characterizations of long period fiber gratings and fiber Bragg grating arrays realized by forming longitudinal periodic index modulation in an low-loss all-solid PBGFs with high-index Ge-doped rods surrounded by a low index Be-doped ring lattice in the cladding. High order resonances between fundamental core mode and cladding LP01 supermodes are demonstrated and investigated in long period fiber gratings (LPFGs) inscribed in the all-solid photonic bandgap fiber. The fiber Bragg grating array has unusual transmission characteristics, such as large transmission bandwidth and different transmission spectra when launching light into different Ge-doped rods, which is very different from single fiber Bragg grating. These interesting spectral features are analyzed and interpreted.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"99 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":"126052439","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}
引用次数: 0
Transmitter and receiver design for multilevel modulation 多电平调制的收发器设计
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888592
N. Kikuchi
{"title":"Transmitter and receiver design for multilevel modulation","authors":"N. Kikuchi","doi":"10.1117/12.888592","DOIUrl":"https://doi.org/10.1117/12.888592","url":null,"abstract":"Higher-order optical multilevel signaling is a key technique for future ultra-high speed signal transmission at 100 Gbit/s or beyond. In this paper, we review various multilevel transmitter and receiver designs realizing higher-order multilevel signaling with precise optical field modulation and demodulation capabilities.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"233 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":"121462707","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}
引用次数: 0
GMPLS controlled multi-layer ethernet GMPLS控制的多层以太网
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888658
V. Nordell, A. Gavler, Pontus Sköldström
{"title":"GMPLS controlled multi-layer ethernet","authors":"V. Nordell, A. Gavler, Pontus Sköldström","doi":"10.1117/12.888658","DOIUrl":"https://doi.org/10.1117/12.888658","url":null,"abstract":"This paper presents the novel idea of using a GMPLS control plane for all flavors of an IEEE 802.1Q multilayer Ethernet, applied to an access and aggregation network scenario. Such a network could provide better resilience, control of resource allocation, bandwidth guarantees and the possibility of having a unified control plane in an environment that includes more and more type of forwarding technologies. It might also be possible to reuse existing equipment and provide backward compatibility for legacy systems when deploying such a GMPLS network over an existing Ethernet based network. This was accomplished through extending GMPLS protocols by defining a new switch capability object, new label object for ML Ethernet, and the development of control plane procedures for handling scenarios specific to ML Ethernet. These extensions has been implemented and verified, along with the development of a ML Ethernet aware PCE, and the results indicates that this novel architecture is plausible and has an interesting potential.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"93 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":"115216239","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}
引用次数: 2
Compensating Gordon-Mollenauer phase noise by midlink optical phase conjugation for long-haul 40Gb/s CO-OFDM systems 远距离40Gb/s CO-OFDM系统中路光相位共轭补偿Gordon-Mollenauer相位噪声
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888444
Xuejun Liu, Yaojun Qiao, Yuefeng Ji
{"title":"Compensating Gordon-Mollenauer phase noise by midlink optical phase conjugation for long-haul 40Gb/s CO-OFDM systems","authors":"Xuejun Liu, Yaojun Qiao, Yuefeng Ji","doi":"10.1117/12.888444","DOIUrl":"https://doi.org/10.1117/12.888444","url":null,"abstract":"Midlink optical phase conjugation (OPC) based on four wave mixing (FWM) in semiconductor optical amplifier (SOA) can be used to compensate for the nonlinearity phase noise, Gordon-Mollenauer effect, in CO-OFDM long-haul systems. Simulation of 40Gb/s CO-OFDM systems without optical dispersion compensation is presented and the Q factor can be increased by >6 dB through OPC.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"64 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":"124162783","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}
引用次数: 0
QD fiber amplifier using a fiber coupler with a PbS QD-film 使用带PbS量子点薄膜的光纤耦合器的量子点光纤放大器
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888594
Hairun Guo, F. Pang, Xianglong Zeng, Tingyun Wang
{"title":"QD fiber amplifier using a fiber coupler with a PbS QD-film","authors":"Hairun Guo, F. Pang, Xianglong Zeng, Tingyun Wang","doi":"10.1117/12.888594","DOIUrl":"https://doi.org/10.1117/12.888594","url":null,"abstract":"A semiconductor QD fiber amplifier (SQDFA) is proposed and theoretically researched. The fiber amplifier makes use of a tapered twin SMF coupler and a PbS QD-film is coated on the surface of it. In the tapered region, QDs will be excited by the evanescent wave of a pump and produce a gain on signal. The fiber coupler is properly designed to ensure a desired power ratio of the output signal. Using a 1530-nm signal and a 980-nm pump, an optical gain of about 8 dB is achieved with a gain efficiency of 3.48dB/cm. This SQDFA has unique advantages including suppression to the amplified spontaneous emission (ASE), simple fabrication and lower insertion loss and thus has a great potential in fiber communication systems.","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":"122283411","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}
引用次数: 0
The effect of different chemical agents on human enamel: an atomic force and scanning electron microscopy study 不同化学试剂对人牙釉质的影响:原子力和扫描电子显微镜研究
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.891372
R. Romînu, M. Rominu, M. Negruțiu, C. Sinescu, D. Pop, E. Petrescu
{"title":"The effect of different chemical agents on human enamel: an atomic force and scanning electron microscopy study","authors":"R. Romînu, M. Rominu, M. Negruțiu, C. Sinescu, D. Pop, E. Petrescu","doi":"10.1117/12.891372","DOIUrl":"https://doi.org/10.1117/12.891372","url":null,"abstract":"PURPOSE: The goal of our study was to investigate the changes in enamel surface roughess induced by the application of different chemical substances by atomic force microscopy and scanning electron microscopy. METHOD: Five sound human first upper premolar teeth were chosen for the study. The buccal surface of each tooth was treated with a different chemical agent as follows: Sample 1 - 38% phosphoric acid etching (30s) , sample 2 - no surface treatment (control sample), 3 - bleaching with 37.5 % hydrogen peroxide (according to the manufacturer's instructions), 4 - conditioning with a self-etching primer (15 s), 5 - 9.6 % hydrofluoric acid etching (30s). All samples were investigated by atomic force microscopy in a non-contact mode and by scanning electron microscopy. Several images were obtained for each sample, showing evident differences regarding enamel surface morphology. The mean surface roughness and the mean square roughness were calculated and compared. RESULTS: All chemical substances led to an increased surface roughness. Phosphoric acid led to the highest roughness while the control sample showed the lowest. Hydrofluoric acid also led to an increase in surface roughness but its effects have yet to be investigated due to its potential toxicity. CONCLUSIONS: By treating the human enamel with the above mentioned chemical compounds a negative microretentive surface is obtained, with a morphology depending on the applied substance.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"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":"131212343","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}
引用次数: 0
An all-optical UWB generation and modulation scheme for multiuser UWB-over-fiber system 一种多用户光纤超宽带系统的全光超宽带产生和调制方案
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888112
Fei Wang, Xinliang Zhang, E. Xu, Yin Zhang
{"title":"An all-optical UWB generation and modulation scheme for multiuser UWB-over-fiber system","authors":"Fei Wang, Xinliang Zhang, E. Xu, Yin Zhang","doi":"10.1117/12.888112","DOIUrl":"https://doi.org/10.1117/12.888112","url":null,"abstract":"An all-optical UWB pulses generation and modulation scheme based on a semiconductor optical amplifier and a DWDM is proposed and demonstrated, which has potential applications in multiuser UWB-Over-Fiber communications systems. Using proposed scheme, pulse amplitude modulation (PAM), pulse polarity modulation (PPM) and pulse shape modulation (PSM) can be conveniently realized.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"7987 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":"130040781","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}
引用次数: 0
Simulation of radiation coupling by complex coupled-mode theory 用复耦合模理论模拟辐射耦合
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888078
Wei-Ping Huang, Jianwei Mu
{"title":"Simulation of radiation coupling by complex coupled-mode theory","authors":"Wei-Ping Huang, Jianwei Mu","doi":"10.1117/12.888078","DOIUrl":"https://doi.org/10.1117/12.888078","url":null,"abstract":"Resonant coupling to radiation field in optical waveguides is simulated accurately and efficiently by complex coupled mode theory. Salient features of complex mode theory are demonstrated by investigation of transmission spectra in short/long period gratings.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"152 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":"122448093","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}
引用次数: 1
Light-induced scattering in CdSe quantum dots CdSe量子点的光致散射
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888546
Qiguang Yang, Jaetae Seo, B. Tabibi, D. Temple
{"title":"Light-induced scattering in CdSe quantum dots","authors":"Qiguang Yang, Jaetae Seo, B. Tabibi, D. Temple","doi":"10.1117/12.888546","DOIUrl":"https://doi.org/10.1117/12.888546","url":null,"abstract":"The CdSe quantum dots have been synthesized and their optical properties have been investigated at 775 nm. It was found that both linear absorption and linear scattering were negligible in these colloidal cadmium selenide quantum dots when the light intensity was weak. A strong light-induced scattering was observed when a strong 150 fs Ti:Sapphire laser incident on the sample. The physical origins and the possible photonic applications of this phenomenon were investigated.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"262 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":"127545290","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}
引用次数: 0
A dual polarization optical 90°-hybrid in silicon-on-insulator waveguides 绝缘体上硅波导中的双偏振光学90°混合波导
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888294
Yanping Li, Tingting Hong, Ziyu Wang
{"title":"A dual polarization optical 90°-hybrid in silicon-on-insulator waveguides","authors":"Yanping Li, Tingting Hong, Ziyu Wang","doi":"10.1117/12.888294","DOIUrl":"https://doi.org/10.1117/12.888294","url":null,"abstract":"An all-passive dual polarization optical 90°-hybrid in silicon-on-insulator waveguides is proposed and designed. It consists of two 2x2 MMI-MZI structures, working as polarization beam splitters, and two 4x4 MMI couplers, working as 90°-hybrids. The fabrication process includes only one step of inductively coupled plasma (ICP) etching. It is particularly suitable for silicon-based integration of DP-QPSK receiver.","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":"114714089","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}
引用次数: 1
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