{"title":"Long-haul microwave analog link with shot-noise-limited performance above the Stimulated Brillouin Scattering threshold","authors":"P. Devgan, V. Urick, K. Williams, J. Diehl","doi":"10.1109/MWP.2008.4666703","DOIUrl":"https://doi.org/10.1109/MWP.2008.4666703","url":null,"abstract":"We have assembled and characterized a microwave frequency analog fiber link that offers shot-noise-limited performance at input powers above the stimulated Brillouin scattering threshold. The 20 km span of fiber consists of three pairs of alternating fibers, with each pair separated by isolators. The measured SBS threshold using the backscatter approach is 14 dBm; however, the measured relative intensity noise from 1-8 GHz remains at the shot-noise level until the input power exceeds 16 dBm. When compared to a single fiber link of the same length, the link gain, RF noise figure, and SFDR at 1 GHz all improve by 8.1 dB, 4.1 dB and 2.8 dB, respectively.","PeriodicalId":115448,"journal":{"name":"2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124725971","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}
{"title":"Multilevel modulated signal transmission for millimeter-wave radio over fiber system","authors":"P. Shen, A. Nkansah, J. James, N. Gomes","doi":"10.1109/MWP.2008.4666626","DOIUrl":"https://doi.org/10.1109/MWP.2008.4666626","url":null,"abstract":"quadrature phase-shift keying (QPSK), 16 quadrature amplitude modulation (QAM), and 64-QAM data transmission at 6 MS/s are successfully demonstrated in a 60 GHz millimeter-wave over fiber system with good error vector magnitude performance recorded for the downlink. The system utilizes a photonic method to produce the 60 GHz carrier by employing a dual wavelength source consisting of an optical phase modulator and DWDM filter. The transmission of the data over a 20 km span of fiber has been performed with very good stability over a measurement period of 128 minutes.","PeriodicalId":115448,"journal":{"name":"2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126019080","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}
{"title":"Optically reconfigurable matching networks","authors":"D. Draskovic, D. Budimir","doi":"10.1109/MWP.2008.4666654","DOIUrl":"https://doi.org/10.1109/MWP.2008.4666654","url":null,"abstract":"In this paper an optically reconfigurable circuit as a part of the input matching network is proposed and applied in order to design a 2.5-3.5 GHz frequency tunable power amplifier. Tunability is achieved by increasing the power of the laser applied to the highly resistive silicon wafer and changing the properties of silicon under optical illumination. Tunable class AB power amplifier with the optical switch in the input matching circuit has obtained the frequency tuning range of 2.5-3.5 GHz with no significant loss in efficiency and linearity.","PeriodicalId":115448,"journal":{"name":"2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130999075","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}
I. Morohashi, T. Sakamoto, T. Kawanishi, I. Hosako, M. Tsuchiya, H. Sotobayashi
{"title":"Wideband repetition rate tunability of ultrashort pulse generation using MZ-modulator-based flat comb generator and DF-DDF","authors":"I. Morohashi, T. Sakamoto, T. Kawanishi, I. Hosako, M. Tsuchiya, H. Sotobayashi","doi":"10.1109/MWP.2008.4666693","DOIUrl":"https://doi.org/10.1109/MWP.2008.4666693","url":null,"abstract":"We have demonstrated wideband frequency-tunable ultrashort pulse generation using a Mach-Zehnder-modulator-based flat comb generator (MZ-FCG) and a dispersion- flattened dispersion-decreasing fiber. Continuous wave lights were converted to ultraflat comb signals by the MZ-FCG. The comb signals were formed into picosecond pulse trains by chirp compensation, and they are compressed into femtosecond ones by a soliton compression technique. Pulse trains of 200 fs width were successfully generated in a repetition rate range of 5-17 GHz. Our pulse source is very simple configuration and possesses high stability and low timing jitter.","PeriodicalId":115448,"journal":{"name":"2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126653316","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}
{"title":"Simultaneous baseband and radio over fiber signal transmission over a 5 km MMF link","authors":"I. Gasulla, J. Capmany","doi":"10.1109/MWP.2008.4666673","DOIUrl":"https://doi.org/10.1109/MWP.2008.4666673","url":null,"abstract":"We have successfully demonstrated the simultaneous transmission of high-frequency subcarrier multiplexed CATV channels and 2.5 Gb/s error- free digital through a 5 km 62.5-mum core-diameter graded-index multimode silica fiber link. Successful transmission is achieved by a combination of a low-linewidth DFB laser and singlemode fiber central launching.","PeriodicalId":115448,"journal":{"name":"2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114298275","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}
L. Pierno, M. Dispenza, G. Tonelli, A. Bogoni, P. Ghelfi, L. Potí
{"title":"A photonic ADC for radar and EW applications based on modelocked laser","authors":"L. Pierno, M. Dispenza, G. Tonelli, A. Bogoni, P. Ghelfi, L. Potí","doi":"10.1109/MWP.2008.4666680","DOIUrl":"https://doi.org/10.1109/MWP.2008.4666680","url":null,"abstract":"This paper presents a WDM architecture of a photonic analogue to digital converter (ADC) for direct RF sampling in radar and EW digital receiver, the architecture is based on the parallel operation of an array of state-of-the-art electronic ADCs while the photonic sampling is achieved using a mode locked laser (MLL). The parallelisation is implemented through a novel technique for the slicing of the optical spectrum and the time interleaving of the colored pulses. A high dynamic range by bandwidth product of the ADC can be obtained. The MLL overcomes the jitter limitation in conventional electronic quartz references in electronic ADCs and can be also fiber optic distributed as reference clock for the Radar Tx and Rx functions. The test realized on the prototype is reported demonstrating a 5 Gbps sampling rate ADC.","PeriodicalId":115448,"journal":{"name":"2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114413544","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}
{"title":"All-optical RF spectrum analysis of ultra-high speed optical signals","authors":"T. Vo, M. Pelusi, B. Eggleton","doi":"10.1109/MWP.2008.4666701","DOIUrl":"https://doi.org/10.1109/MWP.2008.4666701","url":null,"abstract":"We experimentally demonstrate an all-optical technique for monitoring the radio-frequency (RF) spectrum of ultra-high bit-rate signals, with bandwidths exceeding 1 THz. This monitoring scheme exploits the ultra-fast response time of the optical Kerr nonlinear effect, such that the instantaneous intensity of the signal is translated to a phase modulation of a co-propagating probe, which can be measured as a frequency modulation on a standard optical spectrum analyzer, without the need for high-speed electronics. This scheme is applied to measure the optical RF spectrum of ultra-high bit-rate 160 and 320 Gb/s optical signals, and shows that impairments caused by either chromatic dispersion or amplitude modulation can be effectively monitored, thereby providing a useful diagnostic tool. The advantages of ultra-high bandwidth (up to terahertz), very fast response time and simple setup are highlighted.","PeriodicalId":115448,"journal":{"name":"2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129770175","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}
G. Baili, M. Alouini, T. Malherbe, D. Dolfi, J. Huignard, F. Bretanaker, I. Sagnes, T. Merlet, J. Chazelas
{"title":"Ultra low microwave additive phase noise for an optical RF link based on a Class-A semiconductor laser","authors":"G. Baili, M. Alouini, T. Malherbe, D. Dolfi, J. Huignard, F. Bretanaker, I. Sagnes, T. Merlet, J. Chazelas","doi":"10.1109/MWP.2008.4666656","DOIUrl":"https://doi.org/10.1109/MWP.2008.4666656","url":null,"abstract":"The additive RF phase noise of a microwave photonics link is measured using, as the optical source, a semiconductor laser operating in the Class-A regime. The relative intensity noise of this laser being below the shot noise relative level, the phase noise floor of the link is shown to be shot noise limited, -152 dBc/Hz in our experimental conditions. As a result, the phase noise floor evolves as the inverse of the detected photocurrent, pushing the limits of performance to the availability of high power photo-detectors. Below 6 kHz from the carrier frequency at 3 GHz, some noise, in excess with respect to the shot noise limit, is observed but remains lower than -110 dBc/Hz at 100 Hz offset frequency. This residual noise originates mainly from technical noise and can be reduced by isolating the laser from acoustic/electromagnetic perturbations.","PeriodicalId":115448,"journal":{"name":"2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129030138","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}
{"title":"An optically powered radio over fiber remote unit using wavelength division multiplexing","authors":"D. Wake, N. Gomes, C. Lethien, C. Sion, J. Vilcot","doi":"10.1109/MWP.2008.4666670","DOIUrl":"https://doi.org/10.1109/MWP.2008.4666670","url":null,"abstract":"Power over fiber and radio over fiber transmission have been combined in a single optical fiber using wavelength division multiplexing for the first time. It is shown that there is no impairment to the radio over fiber transmission performance from the power transmission link. There is however a power penalty caused by the insertion losses of the multiplexer and demultiplexer and potentially a further insertion loss depending on the type of transmission fiber used.","PeriodicalId":115448,"journal":{"name":"2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122502996","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}
{"title":"Multi-standard radio-over-fiber systems using CMOS-compatible Si avalanche photodetectors","authors":"Hyo-soon Kang, Myung-Jae Lee, W. Choi","doi":"10.1109/MWP.2008.4666697","DOIUrl":"https://doi.org/10.1109/MWP.2008.4666697","url":null,"abstract":"We present a radio-over-fiber (RoF) receiver using a Si avalanche photodetector fabricated with 0.18 mum standard complementary metal-oxide-semiconductor (CMOS) technology. Using the device, multi-standard services including 2-GHz band wideband code division multiple access (WCDMA) and 5-GHz band wireless local area network (WLAN) signals are successfully transmitted. With error vector magnitude (EVM) measurements, interference between two signals in RoF system is analyzed.","PeriodicalId":115448,"journal":{"name":"2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116310765","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}