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Rateless codes mitigation technique in a turbulent indoor Free Space Optics link 湍流室内自由空间光学链路中的无速率码抑制技术
2014 Third Mediterranean Photonics Conference Pub Date : 2014-05-07 DOI: 10.1109/MEPHOCO.2014.6866479
R. Pernice, A. Andò, D. Musso, F. Lionti, A. Parisi, S. Mangione, G. Adamo, L. Curcio, S. Stivala, A. Busacca
{"title":"Rateless codes mitigation technique in a turbulent indoor Free Space Optics link","authors":"R. Pernice, A. Andò, D. Musso, F. Lionti, A. Parisi, S. Mangione, G. Adamo, L. Curcio, S. Stivala, A. Busacca","doi":"10.1109/MEPHOCO.2014.6866479","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866479","url":null,"abstract":"Free Space Optics (FSO) links are affected by several impairments and, among them, optical turbulence is the most important factor that can degrade the link quality. Due to the presence of this phenomenon, the signal irradiance detected by the receiver fluctuates, thus causing erasure errors and fading events. In this work, we present an indoor Free Space Optics link, in which several turbulence conditions are generated by using two heating elements. We show that the generated turbulence causes erasure errors and packet losses during the data transmission, and we also compare the statistical distribution of the samples with the theoretical models. Moreover, we demonstrate how the application of the most recent rateless codes, i.e., RaptorQ codes, can strongly improve the link quality. In particular, results show that the Packet Error Rate strongly decreases when employing RaptorQ codes. Finally, we conclude that, by properly setting the encoding/decoding parameters, we can correctly receive the whole transmitted data without any errors.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122935234","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: 11
Fiber coupled Er3+: Chalcogenide microsphere amplifier in mid-IR wavelength range 中红外光纤耦合Er3+:硫化物微球放大器
2014 Third Mediterranean Photonics Conference Pub Date : 2014-05-07 DOI: 10.1109/MEPHOCO.2014.6866469
G. Palma, T. Castellano, O. Losito, T. Yano, V. Nazabal, J. Taguchi, A. Moreac, M. Ferrari, F. Prudenzano
{"title":"Fiber coupled Er3+: Chalcogenide microsphere amplifier in mid-IR wavelength range","authors":"G. Palma, T. Castellano, O. Losito, T. Yano, V. Nazabal, J. Taguchi, A. Moreac, M. Ferrari, F. Prudenzano","doi":"10.1109/MEPHOCO.2014.6866469","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866469","url":null,"abstract":"A mid-IR amplifier constituted of a tapered chalcogenide fiber coupled to an Er3+-doped chalcogenide microsphere has been optimized via a particle swarm optimization (PSO) algorithm. The numerical model is based on the coupled mode theory and on the erbium rate equations, including the main transitions among the ion energy levels. The PSO has allowed the optimal choice of the microsphere and taper fiber radius, fiber angle taper, fiber-microsphere gap in order to maximize the amplifier gain, which is close to G=7 dB, calculated for a pump power Pp = 100 mW and the input signal power Ps = -50 dBm, at signal wavelength λ=4500 nm.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128563870","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 of a compact high-performance InP ring resonator 一种紧凑的高性能InP环形谐振器的设计
2014 Third Mediterranean Photonics Conference Pub Date : 2014-05-07 DOI: 10.1109/MEPHOCO.2014.6866452
D. D’Agostino, G. Carnicella, C. Ciminelli, H. Ambrosius, M. Smit
{"title":"Design of a compact high-performance InP ring resonator","authors":"D. D’Agostino, G. Carnicella, C. Ciminelli, H. Ambrosius, M. Smit","doi":"10.1109/MEPHOCO.2014.6866452","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866452","url":null,"abstract":"This work reports on the design of a ring resonator with a high quality factor compatible with InP based generic foundry processes. The resonator consists of a spiral delay line, coupled to a waveguide via a Multimode Interference Coupler with unequal splitting ratio. The spiral loss is greatly reduced by using low-doped shallowly etched waveguides with millimeter bending radii. Based on a measured propagation loss of 0.3 dB/cm, a quality factor of 106 and an extinction ratio of about 10 dB are expected for a ring length of 80 mm. By folding the ring into a spiral the chip size is reduced significantly, resulting in a footprint of 2.5 mm × 3.6 mm.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131056796","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
Signal to Noise Ratio of silicon photomultipliers measured in the continuous wave regime 连续波状态下硅光电倍增管的信噪比测量
2014 Third Mediterranean Photonics Conference Pub Date : 2014-05-07 DOI: 10.1109/MEPHOCO.2014.6866473
G. Adamo, D. Agrò, S. Stivala, A. Parisi, A. Tomasino, L. Curcio, R. Pernice, C. Giaconia, A. Busacca, G. Fallica
{"title":"Signal to Noise Ratio of silicon photomultipliers measured in the continuous wave regime","authors":"G. Adamo, D. Agrò, S. Stivala, A. Parisi, A. Tomasino, L. Curcio, R. Pernice, C. Giaconia, A. Busacca, G. Fallica","doi":"10.1109/MEPHOCO.2014.6866473","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866473","url":null,"abstract":"We performed a Signal to Noise Ratio characterization, in the continuous wave regime, at different bias voltages, frequencies and temperatures, on a novel class of silicon photomultipliers fabricated in planar technology on silicon p-type substrate. Signal to Noise Ratio has been measured as the ratio of the photogenerated current, filtered and averaged by a lock-in amplifier, and the Root Mean Square deviation of the overall current flowing to the device. The measured noise takes into account the shot noise, resulting from the photocurrent and the dark current. We have also performed a comparison between our SiPMs and a photomultiplier tube in terms of Signal to Noise Ratio, as a function of the temperature of the SiPM package and at different bias voltages. Furthermore, Excess Noise Factor measurements of the SiPM, as a function of the applied bias, are shown and discussed. Our results show the outstanding performance of this novel class of SiPMs even without the need of any cooling system.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134032816","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: 19
Optical dispersion relations as a fundamental tool for the superluminal relativistic limit 光色散关系是研究超光速相对论极限的基本工具
2014 Third Mediterranean Photonics Conference Pub Date : 2014-05-07 DOI: 10.1109/MEPHOCO.2014.6866475
A. Cutolo
{"title":"Optical dispersion relations as a fundamental tool for the superluminal relativistic limit","authors":"A. Cutolo","doi":"10.1109/MEPHOCO.2014.6866475","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866475","url":null,"abstract":"The superluminal relativistic limit (SRL), which states that the velocity of light in vacuum (c) cannot be passed by any object, is wrongly considered a postulate of the special theory of relativity (STR) even if Einstein himself never claimed something like that. We derive the SRL as a direct consequence of the classical causality principle and of the optical dispersion relations. Attention is paid to the case of vacuum with gravitational fields where the SRL can lose its validity in agreement with the quantum electrodynamics.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134039452","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
On-line tests of an optical fiber long-period grating subjected to gamma irradiation 辐照下光纤长周期光栅的在线测试
2014 Third Mediterranean Photonics Conference Pub Date : 2014-05-07 DOI: 10.1109/MEPHOCO.2014.6866486
D. Sporea, A. Stăncălie, D. Negut, G. Pilorget, S. Delepine-Lesoille, L. Lablonde
{"title":"On-line tests of an optical fiber long-period grating subjected to gamma irradiation","authors":"D. Sporea, A. Stăncălie, D. Negut, G. Pilorget, S. Delepine-Lesoille, L. Lablonde","doi":"10.1109/MEPHOCO.2014.6866486","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866486","url":null,"abstract":"The paper reports the outcomes of the tests we conducted as on-line measurements for the evaluation of an optical fiber long period grating (LPG) produced, by fusion technique, in F-doped radiation hardened optical fiber subjected to gamma irradiation. The dosimetry was performed with an Alanine-EPR dosimetry system and the maximum total irradiation dose reached was (45 +/- 0.8)kGy. Before the irradiation the temperature sensitivity of the LPG was 27.8 pm/°C, while the value of this parameter post irradiation was found to be 29.3 pm/°C. The spectral characteristics of the grating were measured (i) in the laboratory with an ANDO AQ6317C optical spectrum analyzer and (ii) on-line, for the first time, with a LUNA OBR 4600 backscatter reflectometer, operating in the frequency acquisition mode. Such on-line measurement enables the study of recovery effects during the irradiation. The central wavelength of the LPG shifted under gamma irradiation by 16 pm/kGy (for a total dose of 45 kGy). At room temperature the recovery of the irradiation induced shift of the wavelength dip was almost complete in about 120 h, at a rate of 6.7 pm/h. Post irradiation heating of the sensor produced the reversing of the recovery effect.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133581510","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: 9
Radiation tolerant humidity sensors based on nano-scale TiO2-coated LPGs for high-energy physics applications 高能物理应用中基于纳米级二氧化钛涂层lpg的耐辐射湿度传感器
2014 Third Mediterranean Photonics Conference Pub Date : 2014-05-07 DOI: 10.1109/MEPHOCO.2014.6866458
G. Berruti, M. Consales, A. Borriello, M. Giordano, S. Buontempo, G. Breglio, A. Makovec, P. Petagna, A. Cusano
{"title":"Radiation tolerant humidity sensors based on nano-scale TiO2-coated LPGs for high-energy physics applications","authors":"G. Berruti, M. Consales, A. Borriello, M. Giordano, S. Buontempo, G. Breglio, A. Makovec, P. Petagna, A. Cusano","doi":"10.1109/MEPHOCO.2014.6866458","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866458","url":null,"abstract":"This contribution deals with a feasibility analysis for the development of radiation tolerant fiber optic humidity sensors based on long period grating (LPG) technology to be applied in high-energy physics (HEP) experiments currently running at the European Organization for Nuclear Research (CERN). Here we propose a high-sensitivity LPG sensor coated with a finely tuned titanium dioxide (TiO2) thin layer (~100 nm thick) for relative humidity (RH) monitoring in the humidity range [0-75]%RH and in the temperature range [-10°C, 25]°C. Experimental results demonstrate the very high RH sensitivities of the proposed device (up to 1.4 nm/%RH at low humidity). The TiO2-coated LPG sensor radiation tolerance is also investigated up to 1Mrad γ-ionizing radiation dose. Collected results demonstrate the strong potentialities of the proposed technology in light of its future exploitation in HEP applications.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130537885","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
Broadband light trapping in nanopatterned thin film amorphous silicon solar cells 纳米化薄膜非晶硅太阳能电池中的宽带光捕获
2014 Third Mediterranean Photonics Conference Pub Date : 2014-05-07 DOI: 10.1109/MEPHOCO.2014.6866455
C. Martella, C. Mennucci, M. Giordano, F. Buatier de Mongeot, P. Delli Veneri, L. Mercaldo, I. Usatii
{"title":"Broadband light trapping in nanopatterned thin film amorphous silicon solar cells","authors":"C. Martella, C. Mennucci, M. Giordano, F. Buatier de Mongeot, P. Delli Veneri, L. Mercaldo, I. Usatii","doi":"10.1109/MEPHOCO.2014.6866455","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866455","url":null,"abstract":"Here we report on the potentiality of the self-organised nanopatterning in view of broadband photon harvesting in thin film amorphous silicon (a-Si) solar cells. Self-organised pattern formation of glass, semiconductor and TCO interfaces is achieved recurring to low-energy Ion Beam Sputtering (IBS).","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115283883","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
Feasibility study of aperiodic backreflectors for thin film Si solar cells with focused ion beam lithography 聚焦离子束光刻薄膜硅太阳能电池非周期背反射器的可行性研究
2014 Third Mediterranean Photonics Conference Pub Date : 2014-05-07 DOI: 10.1109/MEPHOCO.2014.6866496
A. Micco, A. Ricciardi, M. Pisco, A. Cusano, V. La Ferrara, I. Usatii, L. Mercaldo, P. D. Veneri
{"title":"Feasibility study of aperiodic backreflectors for thin film Si solar cells with focused ion beam lithography","authors":"A. Micco, A. Ricciardi, M. Pisco, A. Cusano, V. La Ferrara, I. Usatii, L. Mercaldo, P. D. Veneri","doi":"10.1109/MEPHOCO.2014.6866496","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866496","url":null,"abstract":"Recently, great efforts have been carried out to design optimized metallic nano-grating back-reflectors to improve the light absorption in thin film solar cells. In this paper, is introduced a feasibility study on the prototyping of patterned substrate for solar cell fabrication. In particular, is demonstrated that the Focused Ion Beam lithography not affect the electric performances of the realized cell, giving us the opportunity to use this lithography technique for prototyping each kind of substrate for solar cell fabrication.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127539147","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
Fiber cavity ring-down for strain sensing using an OTDR 使用OTDR进行应变传感的光纤腔衰荡
2014 Third Mediterranean Photonics Conference Pub Date : 2014-05-07 DOI: 10.1109/MEPHOCO.2014.6866500
S. Silva, D. J. Passos, M. Marques, O. Frazão
{"title":"Fiber cavity ring-down for strain sensing using an OTDR","authors":"S. Silva, D. J. Passos, M. Marques, O. Frazão","doi":"10.1109/MEPHOCO.2014.6866500","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866500","url":null,"abstract":"This work presents a fiber CRD configuration for the measurement of strain. An Optical Time-Domain Reflectometer was used to send impulses down into the fiber loop cavity, inside of which a chirped fiber Bragg grating was placed to act as a strain sensing element. This technique could provide strain results with both conventional CRD-based configuration and the OTDR.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123194877","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
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