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Analysis of the transmission spectra and the parameters extraction of the GaN-based films 氮化镓基薄膜的透射光谱分析及参数提取
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2008-11-18 DOI: 10.1117/12.803292
C. Li, Xue Li, Jin-tong Xu, Yan Zhang, Xiang-yang Li
{"title":"Analysis of the transmission spectra and the parameters extraction of the GaN-based films","authors":"C. Li, Xue Li, Jin-tong Xu, Yan Zhang, Xiang-yang Li","doi":"10.1117/12.803292","DOIUrl":"https://doi.org/10.1117/12.803292","url":null,"abstract":"Nowadays, GaN-based multi-layer materials is developing fast, and it is important to know their interface and optical properties for devices design and fabrication. In this letter, the transmission spectra are analyzed, and the dependence of the transmission spectra on parameters of the samples is discussed. Sequentially, we obtain the transmission spectra of a series of GaN-based samples. Simulation of the transmission spectra is done and useful information is extracted. For one of our samples, the refractive index varies a little between 2.518 and 2.305 with the wavelength from 400 to 800nm, while the extinction coefficient is 6x-10-9.5exp(2700/λ), and the thickness is 2860nm. Finally, we get the dispersion relationship of the GaN and AlGaN films, and it is compared with the results of some other research groups.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132846807","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
Digital polarization encoding based on orthogonal polarization rotation in a semiconductor optical amplifier 半导体光放大器中基于正交偏振旋转的数字偏振编码
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2008-11-18 DOI: 10.1117/12.804278
Zhengyong Li, Chongqing Wu, S. Yang, C. Tian, R. Y. Zhang
{"title":"Digital polarization encoding based on orthogonal polarization rotation in a semiconductor optical amplifier","authors":"Zhengyong Li, Chongqing Wu, S. Yang, C. Tian, R. Y. Zhang","doi":"10.1117/12.804278","DOIUrl":"https://doi.org/10.1117/12.804278","url":null,"abstract":"We investigate the polarization-dependent mode gains and polarization rotation (PR) of the semiconductor optical amplifier in pump-probe scheme, and find that the relationship between polarization rotation (PR) and mode gains keeps well under different pump power. Thus we can simply obtain the PR angle by measurement of the mode gains. Choosing suitable injected current we realize the orthogonal polarization rotation by pump laser with power of ~3.5 mW. Then we propose a novel digital polarization encoding scheme and perform it well in a 10-km fiber transmission system with data rate at 2.5 G-bit/s, which is promising to promote the optical power-equalized encoding communications.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124019286","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
Integrated photonic beamformer employing continuously tunable ring resonator-based delays in CMOS-compatible LPCVD waveguide technology 基于连续可调环形谐振器延迟的集成光子波束形成器在cmos兼容LPCVD波导技术中
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2008-11-18 DOI: 10.1117/12.803719
C. Roeloffzen, A. Meijerink, L. Zhuang, D. Marpaung, R. Heideman, A. Leinse, M. Hoekman, W. van Etten
{"title":"Integrated photonic beamformer employing continuously tunable ring resonator-based delays in CMOS-compatible LPCVD waveguide technology","authors":"C. Roeloffzen, A. Meijerink, L. Zhuang, D. Marpaung, R. Heideman, A. Leinse, M. Hoekman, W. van Etten","doi":"10.1117/12.803719","DOIUrl":"https://doi.org/10.1117/12.803719","url":null,"abstract":"In this paper a novel CW laser-compatible, squint-free, continuously tunable ring resonator-based optical beamformer mechanism for a phased array receiver system is proposed and partly demonstrated. When the optical delay elements and optical signal processing circuitry are integrated on a chip, a single-chip optical beam forming network (OBFN) is obtained. The optical delay elements are ideally continuously tunable to achieve continuous control of the beam direction, and should have a flat delay and magnitude response over the signal band, to avoid distortion. In the proposed system architecture, filter-based optical single-sideband suppressed-carrier modulation and balanced coherent optical detection are used. Such architecture has significant advantages over a straightforward architecture using optical intensity modulation and direct optical detection, namely reduced complexity of the OBFN chip, and enhanced dynamic range. Measurements on an actual 1×8 OBFN chip and an optical sideband filter chip are presented. Both are realized in CMOS-compatible planar optical waveguide technology (TriPleX).","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125003965","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: 4
Recent progress on arrayed-waveguide grating multi/demultiplexers based on silica planar lightwave circuits 基于二氧化硅平面光波电路的阵列波导光栅多/去复用器研究进展
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2008-11-18 DOI: 10.1117/12.803090
T. Kitoh
{"title":"Recent progress on arrayed-waveguide grating multi/demultiplexers based on silica planar lightwave circuits","authors":"T. Kitoh","doi":"10.1117/12.803090","DOIUrl":"https://doi.org/10.1117/12.803090","url":null,"abstract":"This paper reports recent advances on arrayed waveguide grating (AWG) multi/demultiplexers based on silica-based planar lightwave circuits (PLC). After briefly summarizing the fabrication and properties of PLCs, this work describes a Mach-Zehnder interferometer (MZI)-synchronized AWG with reagrd to reduced loss, and athermalization. The paper then reports our recent demonstration of the integration of a PLC-based wavelength selective switch (WSS) and an integrated single-chip VMUX/DEMUX.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127664985","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: 4
Degradation by the cross-polarization modulation of the conversion efficiency of a wavelength converter based on FWM in a SOA 交叉偏振调制对SOA中基于FWM的波长转换器转换效率的影响
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2008-11-18 DOI: 10.1117/12.803815
M. C. Acosta, R. Maldonado, H. Soto
{"title":"Degradation by the cross-polarization modulation of the conversion efficiency of a wavelength converter based on FWM in a SOA","authors":"M. C. Acosta, R. Maldonado, H. Soto","doi":"10.1117/12.803815","DOIUrl":"https://doi.org/10.1117/12.803815","url":null,"abstract":"This communication addresses, theoretically and experimentally, the effect of the cross polarization modulation (XPolM) phenomenon on the performance of a wavelength converter based on a four wave mixing process (FWM) developed in a semiconductor optical amplifier (SOA). The main studied parameter for evaluating the performance of the wavelength converter is the conversion efficiency, whose degradation, provoked by the XPolM, is analyzed when the four wave mixing process is developed with input signals linearly co-polarized at 0, 45, 90, and -45 degrees. The analysis is based on the theoretical and experimental determinations of the polarization mismatch of the pump and probe signals. Finally, it is demonstrated that classic models lacking the inclusion of the XPolM effect can reflect a significant error in the estimation of the conversion efficiency of a wavelength converter based on FWM.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"7135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130659373","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
Ultrafast all-optical switching using intersubband transitions in InGaAs/AlAs/AlAsSb quantum wells 使用InGaAs/AlAs/AlAsSb量子阱子带间跃迁的超快全光开关
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2008-11-18 DOI: 10.1117/12.803444
Hiroshi Ishikawa, R. Akimoto, G. Cong, M. Nagase, T. Mozume, C. G. Lim, S. Gozu, T. Hasama
{"title":"Ultrafast all-optical switching using intersubband transitions in InGaAs/AlAs/AlAsSb quantum wells","authors":"Hiroshi Ishikawa, R. Akimoto, G. Cong, M. Nagase, T. Mozume, C. G. Lim, S. Gozu, T. Hasama","doi":"10.1117/12.803444","DOIUrl":"https://doi.org/10.1117/12.803444","url":null,"abstract":"Ultrafast all-optical switch based on intersubband transitions in InGaAs/AlAs/AlAsSb quantum well is described. Because of very fast intra-band relaxation in conduction band, we can obtain very fast response of around 1ps. The operation principles and characteristics as an absorption saturation type device are described. Also described is the operation as an all-optical phase modulator. With Mach-Zehnder interferometer configuration, error free all-optical demultiplexing operation from 160-Gb/s to 40-Gb/s was achieved.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130708950","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
Influence of weak optical feedback on the polarization performances of current-modulated VCSELs 弱光反馈对电流调制vcsel偏振性能的影响
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2008-11-18 DOI: 10.1117/12.802745
Xiao-fa Wang, G. Xia, Zhilv Zhang, Xuefei Huang, Zhengmao Wu
{"title":"Influence of weak optical feedback on the polarization performances of current-modulated VCSELs","authors":"Xiao-fa Wang, G. Xia, Zhilv Zhang, Xuefei Huang, Zhengmao Wu","doi":"10.1117/12.802745","DOIUrl":"https://doi.org/10.1117/12.802745","url":null,"abstract":"Based on the framework of the spin-flip model (SFM), for the GHz level modulation frequency, the polarization performances of current-modulated vertical-cavity surface emitting lasers (VCSELs) subject to weak optical feedback have been theoretically investigated. The results show that, for type I polarization switching (PS), under small signal modulation, the variation of the modulation frequency does not affect the polarization direction of the VCSEL output, but due to the influence of the optical feedback, the VCSEL output may behave period, doubling period and chaos state with modulation frequency variation. For the case of the large signal modulation, optical feedback can result in the generation of a new style of PS with the variation of the modulation frequency.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131870565","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
Preparation and transmission loss of the nano-crystal and polymer composite Bi4Ti3O12/PEK-c films 纳米晶体与聚合物复合Bi4Ti3O12/PEK-c薄膜的制备及其透射损耗
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2008-11-18 DOI: 10.1117/12.802846
Hongliang Yang, W. Ji, Q. Ren, Fujun Zhang, Xinqiang Wang, Guanghui Zhang
{"title":"Preparation and transmission loss of the nano-crystal and polymer composite Bi4Ti3O12/PEK-c films","authors":"Hongliang Yang, W. Ji, Q. Ren, Fujun Zhang, Xinqiang Wang, Guanghui Zhang","doi":"10.1117/12.802846","DOIUrl":"https://doi.org/10.1117/12.802846","url":null,"abstract":"Bismuth titanate, Bi4Ti3O12 (BTO), is a typical ferroelectric material with useful properties for optical memory, piezoelectric and electro-optic devices. Its nano-crystals were compounded by the chemical solution decomposition (CSD) technique. The structure and size of BTO were analyzed by X-ray diffraction (XRD) and transmissive electron microscopy (TEM). Three sorts of composite films BTO/PEK-c with different BTO concentration were prepared by spin-coating method at certain conditions. In this article, the scattering losses in thin films were obtained using the photographic technique. The losses in the films with different BTO weight ratios were compared and analyzed.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134531571","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
Terahertz wave dielectric properties of P-type silicon p型硅的太赫兹波介电特性
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2008-11-18 DOI: 10.1117/12.802557
Jiu-sheng Li, Jian-rui Li, Xiaoli Zhao
{"title":"Terahertz wave dielectric properties of P-type silicon","authors":"Jiu-sheng Li, Jian-rui Li, Xiaoli Zhao","doi":"10.1117/12.802557","DOIUrl":"https://doi.org/10.1117/12.802557","url":null,"abstract":"We have measured the absorption spectrum of three kind resistivity p-type silicons by backward-wave oscillator (BWO).The absorption spectrum is examined and analyzed by least square method. The refractive index, absorption coefficient, and dielectric functions of various resistivity p-type silicons are obtained in the frequency range extending from 0.23 THz to 0.375 THz. The experimental results indicate that the absorption coefficient of the p-type silicons are decreased with the resistivity increase and its least absorption coefficient equals 3.87x10-4 cm-1. Our results demonstrate that the applicability of the backward-wave oscillator THz absorption spectroscopy to p-type silicon characteristic analysis by calculating the absorption spectra. This work establishes the basic spectra data for the various resistivity ptype silicons are very significative to design the terahertz waveguide with low loss.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115169265","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
Design and analysis of non-polarizing beam splitter in a glass cube 玻璃立方体非偏振分束器的设计与分析
SPIE/OSA/IEEE Asia Communications and Photonics Pub Date : 2008-11-18 DOI: 10.1117/12.803511
J. Shi, Zhengping Wang, Zongjun Huang, Qingbo Li
{"title":"Design and analysis of non-polarizing beam splitter in a glass cube","authors":"J. Shi, Zhengping Wang, Zongjun Huang, Qingbo Li","doi":"10.1117/12.803511","DOIUrl":"https://doi.org/10.1117/12.803511","url":null,"abstract":"The reflectance and transmittance of thin films at oblique incident angles exhibit strong polarization effects, particularly for the films inside a glass cube. However, the polarization effects are undesirable in many applications. To solve this problem, non-polarizing beam splitters with unique optical thin films have been achieved employing a method of combination of interference and frustrated total internal reflection, the non-polarizing condition expressions based on frustrated total internal reflection has been derived, and the design examples of non-polarizing beam splitters with an optimization technique have been also presented. The results of Rp=(50±0.5)%, Rs=(50±0.5)% andΔr=(0±0.3) degree in the wavelength range of 400-700nm have been obtained. The thickness sensitivity of NPBSs is also analyzed.","PeriodicalId":179447,"journal":{"name":"SPIE/OSA/IEEE Asia Communications and Photonics","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131839014","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
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