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PbSe quantum dots fiber amplifier based on sol-gel self-assembly method 基于溶胶-凝胶自组装方法的PbSe量子点光纤放大器
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888550
Xiaolan Sun, Yanhua Dong, C. Li, Xiaohong Liu, Guangyao Liu, Libin Xie
{"title":"PbSe quantum dots fiber amplifier based on sol-gel self-assembly method","authors":"Xiaolan Sun, Yanhua Dong, C. Li, Xiaohong Liu, Guangyao Liu, Libin Xie","doi":"10.1117/12.888550","DOIUrl":"https://doi.org/10.1117/12.888550","url":null,"abstract":"A PbSe quantum dots (QDs) fiber amplifier has been demonstrated. The PbSe QDs were synthesized via sol-gel self-assembly method. The size of PbSe QDs was controlled to 5.5 nm through control of the reaction time as well as the growth temperature. Transmission electron microscopy (TEM) and photoluminescence (PL) spectroscopy were used to characterize the PbSe QDs samples. The fiber amplifier was fabricated by coating the QDs onto a tapered optical fiber coupler. Through evanescent wave, the QDs were excited to realize optical amplification. A 1550 nm semiconductor light emitting diode (SLED) as the signal source and a 980 nm laser diode (LD) source as the pump were injected into the fiber coupler simultaneously.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"22 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":"114266105","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
Correlated photon pair generation in silicon wire waveguides 硅线波导中相关光子对的产生
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888587
Jierong Cheng, Qiang Zhou, Wei Zhang, Yidong Huang, J. Peng
{"title":"Correlated photon pair generation in silicon wire waveguides","authors":"Jierong Cheng, Qiang Zhou, Wei Zhang, Yidong Huang, J. Peng","doi":"10.1117/12.888587","DOIUrl":"https://doi.org/10.1117/12.888587","url":null,"abstract":"In this paper, correlated photon pairs at 1.55μm are generated in a silicon wire waveguidewith a length of 1.6 mm. The ratio between coincidence count rate and accidental coincidence count rate under room temperature is 19, showing the property of low Raman noise and strong quantum correlation. Moreover, the experiment shows that photon pair generation isstrongly dependent on pump polarization direction. Using quantum perturbation theory, we analyze the contribution of scalar and vectorspontaneous four-wave mixing processes to the generated photon pairs. Due tohigh nonlinear coefficient and high coupling efficiency, the generation rate in quasi-TE mode is much larger than that in quasi-TM mode.The combination of calculated photon pair generation rates through scalar and vector spontaneous four-wave mixing processes agrees well with the experimental result.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"87 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":"133161083","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
Microcontroller based spectrophotometer using compact disc as diffraction grid 基于单片机的光盘衍射光栅分光光度计
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.890979
Saleha Bano, Talat Altaf, Sunila Akbar
{"title":"Microcontroller based spectrophotometer using compact disc as diffraction grid","authors":"Saleha Bano, Talat Altaf, Sunila Akbar","doi":"10.1117/12.890979","DOIUrl":"https://doi.org/10.1117/12.890979","url":null,"abstract":"This paper describes the design and implementation of a portable, inexpensive and cost effective spectrophotometer. The device combines the use of compact disc (CD) media as diffraction grid and 60 watt bulb as a light source. Moreover it employs a moving slit along with stepper motor for obtaining a monochromatic light, photocell with spectral sensitivity in visible region to determine the intensity of light and an amplifier with a very high gain as well as an advanced virtual RISC (AVR) microcontroller ATmega32 as a control unit. The device was successfully applied to determine the absorbance and transmittance of KMnO4 and the unknown concentration of KMnO4 with the help of calibration curve. For comparison purpose a commercial spectrophotometer was used. There are not significant differences between the absorbance and transmittance values estimated by the two instruments. Furthermore, good results are obtained at all visible wavelengths of light. Therefore, the designed instrument offers an economically feasible alternative for spectrophotometric sample analysis in small routine, research and teaching laboratories, because the components used in the designing of the device are cheap and of easy acquisition.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"7991 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":"130245614","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: 3
A hybrid MAC protocol design for energy-efficient very-high-throughput millimeter wave, wireless sensor communication networks 一种混合MAC协议设计，用于高能效的高吞吐量毫米波无线传感器通信网络
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888115
W. Jian, C. Estevez, A. Chowdhury, Z. Jia, Jianxin Wang, Jianguo Yu, G. Chang
{"title":"A hybrid MAC protocol design for energy-efficient very-high-throughput millimeter wave, wireless sensor communication networks","authors":"W. Jian, C. Estevez, A. Chowdhury, Z. Jia, Jianxin Wang, Jianguo Yu, G. Chang","doi":"10.1117/12.888115","DOIUrl":"https://doi.org/10.1117/12.888115","url":null,"abstract":"This paper presents an energy-efficient Medium Access Control (MAC) protocol for very-high-throughput millimeter-wave (mm-wave) wireless sensor communication networks (VHT-MSCNs) based on hybrid multiple access techniques of frequency division multiplexing access (FDMA) and time division multiplexing access (TDMA). An energy-efficient Superframe for wireless sensor communication network employing directional mm-wave wireless access technologies is proposed for systems that require very high throughput, such as high definition video signals, for sensing, processing, transmitting, and actuating functions. Energy consumption modeling for each network element and comparisons among various multi-access technologies in term of power and MAC layer operations are investigated for evaluating the energy-efficient improvement of proposed MAC protocol.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"545 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":"123095089","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: 7
Effect of AWG filtering on spectrally sliced WDM PONs AWG滤波对波分复用波分复用网络的影响
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888672
S. Taebi, S. Saini
{"title":"Effect of AWG filtering on spectrally sliced WDM PONs","authors":"S. Taebi, S. Saini","doi":"10.1117/12.888672","DOIUrl":"https://doi.org/10.1117/12.888672","url":null,"abstract":"In incoherent-injected WDM-PONs, it is shown through simulations and experiments that Flat-band athermal AWGs with channel spacing of 100GHz have improved performance in terms of BER than their Gaussian-shape counterpart, due to the effect of signal filtering. At a BER of 10-9, the power penalty is 2 dB for Flat-band AWGs and more than 4 dB for Gaussian AWGs, which do not reach the required BER. In addition, the effect of AWG detuning in the WDM-PON systems is investigated. It is shown that by detuning the two Flat-band AWGs by 40GHz from their center wavelength, an additional 0.5dB power penalty is induced.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"15 4 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":"130708442","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
Non-invasive imagistic investigation of metal-ceramic crowns 金属陶瓷冠的无创影像学研究
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.891278
E. Petrescu, C. Sinescu, M. Negruțiu, R. Romînu, D. Pop, M. Rominu
{"title":"Non-invasive imagistic investigation of metal-ceramic crowns","authors":"E. Petrescu, C. Sinescu, M. Negruțiu, R. Romînu, D. Pop, M. Rominu","doi":"10.1117/12.891278","DOIUrl":"https://doi.org/10.1117/12.891278","url":null,"abstract":"The objectives of this study are focused on non-invasive investigations of interfaces obtained after repairing metal-ceramic crowns with ceramic repair systems. The noninvasive systems involved in this study are OCT, SEM, AFM and RX. These investigation systems are non-invasive and the samples are not destructed during the investigation.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"80 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":"121198508","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
Influence of uplink limitation and broadcast traffic on power efficiency in long-reach optical access network 远程光接入网中上行限制和广播业务对功率效率的影响
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888589
A. Lovrić, S. Aleksic
{"title":"Influence of uplink limitation and broadcast traffic on power efficiency in long-reach optical access network","authors":"A. Lovrić, S. Aleksic","doi":"10.1117/12.888589","DOIUrl":"https://doi.org/10.1117/12.888589","url":null,"abstract":"Different optical access technologies are studied with respect to their power efficiency. Considered networks provide long-reach optical access. A network model that includes various network and energy related parameters has been developed. The influence of uplink capacity limitation and the amount of broadcast downstream traffic on power efficiency is evaluated within the developed network model. Long-reach passive optical networks provide the best power efficiency.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"7986 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":"129160798","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
LED spectrum measurement via low cost spectrum sensor on-a-chip 通过低成本的片上光谱传感器进行LED光谱测量
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-08 DOI: 10.1117/12.888368
Cheng-Chun Chang, Chien-Chou Chen, Nan-Ting Lin, U. Kurokawa, B. I. Choi
{"title":"LED spectrum measurement via low cost spectrum sensor on-a-chip","authors":"Cheng-Chun Chang, Chien-Chou Chen, Nan-Ting Lin, U. Kurokawa, B. I. Choi","doi":"10.1117/12.888368","DOIUrl":"https://doi.org/10.1117/12.888368","url":null,"abstract":"Miniature spectrometers with desirable properties such as being small in size, light weight and non-fragile provide solutions to a variety of promising application. In this work, through the developed algorithms, a low-cost chip-scale spectrometer is demonstrated in particular for LED spectrum sensing, as the market of LED lights has been booming and low-cost solution for testing and monitoring LEDs spectral characteristics become essential. The developed algorithms are in two forms, namely algebraic approach and training approach. For the algebraic approach, non-negative least square method is reported useful for spectrum reconstruction of narrowband LED spectra. For the training approach, FWHM measurement and peak wavelength measurement, the two major parameters for specifying monotonic LED spectra, are reported with accuracy within 1nm.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"12 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":"125284449","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: 3
Four-wave mixing degradation compensation with digital coherent detection in optical amplifier repeater system 基于数字相干检测的光放大器中继系统四波混频退化补偿
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2010-12-01 DOI: 10.1117/12.888622
Nishiuchi Kazuhumi, Liang Jing, Iwashita Katsushi
{"title":"Four-wave mixing degradation compensation with digital coherent detection in optical amplifier repeater system","authors":"Nishiuchi Kazuhumi, Liang Jing, Iwashita Katsushi","doi":"10.1117/12.888622","DOIUrl":"https://doi.org/10.1117/12.888622","url":null,"abstract":"Further increase of transmission capacity is required for high speed networks and there are some problems to improve WDM system performances. Especially, for-wave-mixing (FWM) is one of the fiber nonlinearities and FWM impairments remain unsolved. In this experiment, we demonstrate digital coherent detection for FWM compensation. Two ASK-modulated optical signals are transmitted through dispersion-shifted fibers (DSF) with an optical amplifier repeater. FWM has been generated by transmitting through DSF. The transmitted signals are combined with phase-locked local oscillator lights because phase information and the phase relation among individual channels can be kept using phase locked light. The detected individual signals are compensated by backward propagation method. The FWM-crosstalk ratio is improved from 12 dB to 17dB and eye-opening is also improved by compensation.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114424376","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
Next-generation wireless networks 下一代无线网络
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2009-12-23 DOI: 10.1117/12.480501
V. Li
{"title":"Next-generation wireless networks","authors":"V. Li","doi":"10.1117/12.480501","DOIUrl":"https://doi.org/10.1117/12.480501","url":null,"abstract":"Advances in information technologies have made it possible to have Personal Information Service, i.e., personalized multimedia information available anywhere, anytime. Such ubiquitous access requires that a portion of the underlying network infrastructure be wireless. This prompts the debate on what the next-generation wireless network will look like. In this paper, we attempt to shed some light on this debate. To help us in this task, we give an overview of the challenges and some solutions associated with operating a wireless multimedia network.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"53 20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129173333","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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