Xiao Zhang, Zhiqiang Zhao, M. Qian, R. Yin, Xianting Zeng, P. Plante
Multi-layer buried channel waveguides were fabricated using sol-gel derived photopatternable organic-inorganic hybrid materials through multi-step spin coating and photolithography. A single mode circular waveguide at 1550 nm was designed and fabricated using core and cladding coatings with refractive indices of 1.508 and 1.504, respectively. Waveguide thermal stability and thermo-optic coefficient were investigated using thermogravimetric analysis (TGA) and spectroscopic ellipsometry, respectively. Waveguide Y splitters with different opening angles were fabricated showing good splitting effect and low propagation losses. The obtained waveguiding results suggest that the sol-gel hybrid material is a favorable candidate in developing waveguide devices such as Y and MMI type splitters, directional couplers and thermal optic switches
{"title":"Fabrication of Waveguide Splitters Using Sol-Gel Hybrid Materials","authors":"Xiao Zhang, Zhiqiang Zhao, M. Qian, R. Yin, Xianting Zeng, P. Plante","doi":"10.1109/MWP.2006.346558","DOIUrl":"https://doi.org/10.1109/MWP.2006.346558","url":null,"abstract":"Multi-layer buried channel waveguides were fabricated using sol-gel derived photopatternable organic-inorganic hybrid materials through multi-step spin coating and photolithography. A single mode circular waveguide at 1550 nm was designed and fabricated using core and cladding coatings with refractive indices of 1.508 and 1.504, respectively. Waveguide thermal stability and thermo-optic coefficient were investigated using thermogravimetric analysis (TGA) and spectroscopic ellipsometry, respectively. Waveguide Y splitters with different opening angles were fabricated showing good splitting effect and low propagation losses. The obtained waveguiding results suggest that the sol-gel hybrid material is a favorable candidate in developing waveguide devices such as Y and MMI type splitters, directional couplers and thermal optic switches","PeriodicalId":305579,"journal":{"name":"2006 International Topical Meeting on Microwave Photonics","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133905060","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 approach is proposed to generating UltraWideBand (UWB) pulse signals in the optical domain. Pulsed light is wavelength-converted to phase-modulated light via cross-phase modulation in a nonlinear fiber, to which a CW probe light is also applied. A fiber Brag grating that serves as a frequency discriminator is connected at the output of the nonlinear fiber. By reflecting the phase-modulated light at the slopes of the FBG electrical monocycle or doublet pulses are obtained at the output of a photodetector. The use of the proposed configuration to implement pulse on-off, polarity and shape modulation in the optical domain is discussed, which provides the potential for fully exploiting the advantages provided by UWB-over-fiber networks
{"title":"An Approach to All-Optical UWB Pulse Generation","authors":"F. Zeng, Qing Wang, J. Yao","doi":"10.1109/MWP.2006.346553","DOIUrl":"https://doi.org/10.1109/MWP.2006.346553","url":null,"abstract":"A novel approach is proposed to generating UltraWideBand (UWB) pulse signals in the optical domain. Pulsed light is wavelength-converted to phase-modulated light via cross-phase modulation in a nonlinear fiber, to which a CW probe light is also applied. A fiber Brag grating that serves as a frequency discriminator is connected at the output of the nonlinear fiber. By reflecting the phase-modulated light at the slopes of the FBG electrical monocycle or doublet pulses are obtained at the output of a photodetector. The use of the proposed configuration to implement pulse on-off, polarity and shape modulation in the optical domain is discussed, which provides the potential for fully exploiting the advantages provided by UWB-over-fiber networks","PeriodicalId":305579,"journal":{"name":"2006 International Topical Meeting on Microwave Photonics","volume":"519 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114382200","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. Gardelein, S. Le Tacon, E. Tanguy, N. Breuil, T. Razban
In this paper we present electrooptic measurement of a crosslinked side chain PGMA/DR1 polymer. Measured values are as high as 11 pm/V at 1310 nm, we present measurement as a function of incident beam reflexion point and show dependance between the reflexion point location over the sample and the measured electrooptic coefficient. We present low frequency relative dielectric constant using a capacitance measurement method. Using this method, we found a relative permittivity of 4.46plusmn0.38 for our polymer. We present a new electrooptic microwave sensor, where we enhance the electrooptical interaction by increasing the optical path length using a Fabry-Perot cavity and we concentrate the electric field inside our device using a microstrip resonator. Expected interaction enhancement value is expected to be as high 310deg compared to the simple reflexion case at low frequency
{"title":"Characterization of electrooptic polymer applied to microwave sensing","authors":"A. Gardelein, S. Le Tacon, E. Tanguy, N. Breuil, T. Razban","doi":"10.1109/MWP.2006.346571","DOIUrl":"https://doi.org/10.1109/MWP.2006.346571","url":null,"abstract":"In this paper we present electrooptic measurement of a crosslinked side chain PGMA/DR1 polymer. Measured values are as high as 11 pm/V at 1310 nm, we present measurement as a function of incident beam reflexion point and show dependance between the reflexion point location over the sample and the measured electrooptic coefficient. We present low frequency relative dielectric constant using a capacitance measurement method. Using this method, we found a relative permittivity of 4.46plusmn0.38 for our polymer. We present a new electrooptic microwave sensor, where we enhance the electrooptical interaction by increasing the optical path length using a Fabry-Perot cavity and we concentrate the electric field inside our device using a microstrip resonator. Expected interaction enhancement value is expected to be as high 310deg compared to the simple reflexion case at low frequency","PeriodicalId":305579,"journal":{"name":"2006 International Topical Meeting on Microwave Photonics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128985337","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}
The ultimate dynamic range of a Class-B microwave-photonic link (MPL) with an ideally-linear input-output transfer function is limited by signal-clipping. This clipping-free dynamic range (CFDR) is derived for a signal band with a Gaussian amplitude probability density function. Considering the fraction of total clipping-induced distortion power falling into the signal band, the CFDR is found to be substantially (e.g. 70 dB) larger than spurious-free dynamic range (SFDR) of conventional Class-A links. This result shows the potential for substantial improvement in link performance through the use of Class-B techniques
{"title":"Clipping-Free Dynamic Range: the Fundamental Limit for Class-B Microwave-Photonic Links","authors":"Jinye Zhang, T. Darcie","doi":"10.1109/MWP.2006.346500","DOIUrl":"https://doi.org/10.1109/MWP.2006.346500","url":null,"abstract":"The ultimate dynamic range of a Class-B microwave-photonic link (MPL) with an ideally-linear input-output transfer function is limited by signal-clipping. This clipping-free dynamic range (CFDR) is derived for a signal band with a Gaussian amplitude probability density function. Considering the fraction of total clipping-induced distortion power falling into the signal band, the CFDR is found to be substantially (e.g. 70 dB) larger than spurious-free dynamic range (SFDR) of conventional Class-A links. This result shows the potential for substantial improvement in link performance through the use of Class-B techniques","PeriodicalId":305579,"journal":{"name":"2006 International Topical Meeting on Microwave Photonics","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132166282","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 present millimeter-wave optoelectronic mixers based on Si photodetectors fabricated by the standard 130 nm complementary metal-oxide-semiconductor (CMOS) process. The photodetector and optoelectronic mixer characteristics are investigated in order to optimize their performances. Using the avalanche process in photodetectors at high reverse bias voltages, efficient optoelectronic mixing with low conversion loss at 30 GHz band is obtained. In order to demonstrate the feasibility of applying this mixer for radio-on-fiber (RoF) applications, detection and frequency up-conversion of optical 5 MS/s, 16 quadrature amplitude modulation (QAM) signals into the 30 GHz band is successfully performed. We believe this is the first report of using CMOS-compatible photodetectors for RoF applications
{"title":"Millimeter-wave Optoelectronic Mixers Based on CMOS-Compatible Si Photodetectors","authors":"Hyo-soon Kang, W. Choi","doi":"10.1109/MWP.2006.346512","DOIUrl":"https://doi.org/10.1109/MWP.2006.346512","url":null,"abstract":"We present millimeter-wave optoelectronic mixers based on Si photodetectors fabricated by the standard 130 nm complementary metal-oxide-semiconductor (CMOS) process. The photodetector and optoelectronic mixer characteristics are investigated in order to optimize their performances. Using the avalanche process in photodetectors at high reverse bias voltages, efficient optoelectronic mixing with low conversion loss at 30 GHz band is obtained. In order to demonstrate the feasibility of applying this mixer for radio-on-fiber (RoF) applications, detection and frequency up-conversion of optical 5 MS/s, 16 quadrature amplitude modulation (QAM) signals into the 30 GHz band is successfully performed. We believe this is the first report of using CMOS-compatible photodetectors for RoF applications","PeriodicalId":305579,"journal":{"name":"2006 International Topical Meeting on Microwave Photonics","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121816581","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 proposed a new method for suppressing the OBI noise in RSOA based WDM/SCM-PON. This method uses the injection-locked FP-LD in central office, which acts as high pass filter into modulation bandwidth of master laser. As an experimental verification, we could find that CNR has increased up to 12 dB and EVM after 10 Km transmission was reduced from 10% to 5% comparing with those without an injection-locked FP-LD for the received optical power of -10 dBm
{"title":"Centralized Optical Beat Noise Suppression by Injection Locking in RSOA based WDM/SCM-PON Optical Links","authors":"Y. Won, Hyuk-Choon Kwon, Sang‐Kook Han","doi":"10.1109/MWP.2006.346517","DOIUrl":"https://doi.org/10.1109/MWP.2006.346517","url":null,"abstract":"We proposed a new method for suppressing the OBI noise in RSOA based WDM/SCM-PON. This method uses the injection-locked FP-LD in central office, which acts as high pass filter into modulation bandwidth of master laser. As an experimental verification, we could find that CNR has increased up to 12 dB and EVM after 10 Km transmission was reduced from 10% to 5% comparing with those without an injection-locked FP-LD for the received optical power of -10 dBm","PeriodicalId":305579,"journal":{"name":"2006 International Topical Meeting on Microwave Photonics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116769520","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}
M. Bakaul, A. Nirmalathas, C. Lim, D. Novak, R. Waterhouse
A hybrid demultiplexing scheme is proposed and demonstrated with the capability to demultiplex multiband optical millimeter-wave (RF), baseband, and IF signals simultaneously, leading to an integrated DWDM network in the access and metro domain
{"title":"Hybrid Demultiplexing Towards the Integration of Millimeter-Wave Fiber-Radio Systems in DWDM Access Networks","authors":"M. Bakaul, A. Nirmalathas, C. Lim, D. Novak, R. Waterhouse","doi":"10.1109/MWP.2006.346513","DOIUrl":"https://doi.org/10.1109/MWP.2006.346513","url":null,"abstract":"A hybrid demultiplexing scheme is proposed and demonstrated with the capability to demultiplex multiband optical millimeter-wave (RF), baseband, and IF signals simultaneously, leading to an integrated DWDM network in the access and metro domain","PeriodicalId":305579,"journal":{"name":"2006 International Topical Meeting on Microwave Photonics","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115141731","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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