International Topical Meeting on Microwave Photonics (MWP1997)最新文献

{"title":"Generation Of A 32 GHz Optical Pulse Train Using Frequency Quadrupling in a Mode-Locked Fibre Ring Laser","authors":"K. Gupta, D. Novak","doi":"10.1109/MWP.1997.740251","DOIUrl":"https://doi.org/10.1109/MWP.1997.740251","url":null,"abstract":"","PeriodicalId":280865,"journal":{"name":"International Topical Meeting on Microwave Photonics (MWP1997)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124901759","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":"Photonic Microwave Signal Processing","authors":"K. Williams, J. L. Dexter, R. Esman","doi":"10.1109/MWP.1997.740258","DOIUrl":"https://doi.org/10.1109/MWP.1997.740258","url":null,"abstract":"","PeriodicalId":280865,"journal":{"name":"International Topical Meeting on Microwave Photonics (MWP1997)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122803739","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":"Diode Pumped And Packaged 10GHz Harmonically Modelocked TiEr:LiNbO/sub 3/-Waveguide Laser for Soliton Transmission","authors":"R. Wessel, A. Greiner, W. Qiu, H. Suche, W. Sohler","doi":"10.1109/MWP.1997.740228","DOIUrl":"https://doi.org/10.1109/MWP.1997.740228","url":null,"abstract":"","PeriodicalId":280865,"journal":{"name":"International Topical Meeting on Microwave Photonics (MWP1997)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122879912","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":"Further Observations On The Optical Generation Of Millimetre-wave Signals By Master/slave Laser Sideband Injection Locking","authors":"D. George, N. Gomes, P. Davies, D. Wake","doi":"10.1109/MWP.1997.740287","DOIUrl":"https://doi.org/10.1109/MWP.1997.740287","url":null,"abstract":"","PeriodicalId":280865,"journal":{"name":"International Topical Meeting on Microwave Photonics (MWP1997)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132735022","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":"Performance Evaluation Of M-QAM Fiber-Optic Links in the Presence of the External Modulator Bias Fluctuations","authors":"M. Shadaram, A. Mody, B. Usevitch, D. Lafaw","doi":"10.1109/MWP.1997.740244","DOIUrl":"https://doi.org/10.1109/MWP.1997.740244","url":null,"abstract":"","PeriodicalId":280865,"journal":{"name":"International Topical Meeting on Microwave Photonics (MWP1997)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115815564","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":"Microwave Generation And Transmission With Chirping Laser Diodes And Dispersive Fibres","authors":"W. Freude, R. Braun, G. Großkopf, F. Schmidt","doi":"10.1109/MWP.1997.740276","DOIUrl":"https://doi.org/10.1109/MWP.1997.740276","url":null,"abstract":"Microwave generation and transmission is possible using directly modulated laser diodes (LD) and optical fibres. The chirp of the LD together with the fibre dispersion influences the microwave spectrum significantly. We calculate the optical spectrum of the LD and the photocurrent spectrum before and after fibre transmission analytically, and compare them with experimental results. We also report on bit error rate measurements for various operating conditions and show that FM-AM conversion in the fibre counterbalances the attenuation when increasing the transmission length. Introduction Hybrid fibre rad0 (HFR) networks upgrade existing copper or optical fibre cables by wireless transmission channels, employing the microwave and mm-wave frequency range 20. . .70 GHz. HFR may be used for future micro and pico-cell broadband mobile communication systems, for wireless in-house connections, or for bridging inexpensively the 'last mile' to a subscriber having no access to a fibre or coax system. Three main technologies exist for transmitting and generating microwave signals by optical means, namely direct intensity modulation (IM) of a laser diode (LD), suppressed carrier modulation with an external Mach-Zehnder modulator , and heterodyne techniques in which optical waves of different frequencies are coherently mixed. We discuss the direct IM of a chirping LD with a sinusoidal subcarrier at fm = 1.95; 2.52; 3.52 and 3.716 GHz for producing at a remote location the lcth harmonic ( I C = 9; 7; 5 and 5) microwave signal at lcfm = 17.6 and 18.58 GHz. We calculate the optical and the photocurrent spectra for an m o d u l a t e d subcarrier at various LD modulation current amplitudes without and with transmission over a dispersive fibre, and compare these spectra to measurements. Decreased bit error rate (BER) power penalties for zncreaszng transmission lengths are explained by these results. I1 Rate equation approach The rate equations for the phase p of the power amplitude a of the electric field, for the photon number Np N la12, and for the carrier concentration n~ [l, Eq. (2.77, 74, 78)] [a, Eq. (3.89)] as a function of the injection current represent a highly nonlinear system of dfferential equations, from which the (optical) Fourier spectrum ii of the power amplitude a may be calculated only numerically. To gain more physical insight, we simplify the problem as follows. Simplified approach The optical output field of a LD is represented by an analytic signal a with amplitude A and total output power Pa leaving the resonator (time t , angular frequency wo = 2 ~ f 0 , vacuum speed of light c, vacuum wavelength XO, frequency fo = c/Xo, Planck's constant h, time constant T R from h t e resonator mirror reflectivities), Spectrum of chirping laser diode a ( t ) = Ao(t) eJwut , Ao(t) = /Ao(t)/eJ'PO(t), P,(t) = $ la(t)I2 = N p ( t ) h f o / ~ ~ . (1) Following the analysis of [3] (also cited in [I, Eq. (5.2)-(5.4)] [2, Eq. (3.222, 3.146)]), the instantaneous f","PeriodicalId":280865,"journal":{"name":"International Topical Meeting on Microwave Photonics (MWP1997)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131954062","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":"Generation Of Microwave Frequency Mixing By Means Of Photoinduced Load","authors":"B. Boyer, S. Rieubon, A. Vilcot, M. Bouthinon","doi":"10.1109/MWP.1997.740252","DOIUrl":"https://doi.org/10.1109/MWP.1997.740252","url":null,"abstract":"In the wide field of interactions between microwaves and optics, the optical control of microwave components ibecomes more and more promising, since it allows a new generation of microwave devices, with a high isolation between the controlling optical signal and the controlled microwave one. These optical microwave planar components are new in the way that they are tunable thanks to the optical power. We present here results on new applications of the optical control of microwave devices, which stand in the microwave frequency mixing.","PeriodicalId":280865,"journal":{"name":"International Topical Meeting on Microwave Photonics (MWP1997)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122263584","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":"Modelocking Of Multisegment Semiconductor Lasers At A Repetition Frequency of 10 GHz for high-speed optical communication systems","authors":"M. Ziegler, G. Jennemann, M. Aziz, S. Uhl, Ingo Fischer, F. Lach, J. Weber, W. Elsasser","doi":"10.1109/MWP.1997.740249","DOIUrl":"https://doi.org/10.1109/MWP.1997.740249","url":null,"abstract":"We report on modelocking behaviour for Merent multisegment lasers grown by SAG-technology. Pulse widths of about 15ps are achieved for active loss modulation. Theoretical investigations with a 'I'LL-model show good correspondence with the experimental results. 1. IN'TRODUCTION Recently much effort has been made to integmte multisegment semiconductor lasers in order to achieve compact, mechanically stable, and high performance devices for high-speed optical communication systems.'-5 Therefore, several technologies have been developed for the fabrication of longitudinal structures consisting of materials with two or even more different bandgaps, which is necessary for an integrated activdpassive coupled cavity modelocked laser with an integrated motidator. In this paper we present experimental results of the modelocking behaviour of different multisegment laser structures grown by selective area growth (SAG) epitaxy. Finally, theoretical investigations based on the transmission line laser model (TLLM)\"' which are in strong coincidence with our experimental results have been performed. 2. LASER STRUCTURE AND EXPERIMENTAL SET-UP The multisegment lasers are grown by selective area growth technology using LP-MOVPE. In a single epitaxial growth step various numbers of MQW waveguides with Werent bandgaps can be realized. Measured peak wavelengths of the photoluminescence spectra show that, between the areas forming the passive waveguide and the Bragg sections (at a wavelength of 1440nm) imd the areas of the modulation sections and the gain sections, large wavelength shifts of 80nm and 118nm are iuAieved respectively.' Typical threshold currents are 30mA to 8OmA depending on the laser structure. A more detailed description of the struictures, the growth system and procedures can be found else~here.~.' DiEerent multisegment lasers have been realized for our modelocking experiments, which will be described in the following. The gain section of the laser is driven with a constant current, and a sinusoidal voltage (modulation power approx. 25dBm) is superimposed onto a reverse lbias to the intra-cavity electroabsorption modulator section. In order to get short modelocked output pulses, the modulation fiequency of approx. lOGHz must precisely correspond to the round trip resonance frequency of the laser cavity (length of the laser is approx. 4.2\"). The passive waveguides can be used to adjust the modelocking frequency and to reduce the total current. The first order gating of the DBR segment allows the selection of the operation wavelength and narrows the emission to a small spectral width. The optical output of the laser is coupled into a lensed single mode fiber. The pulse width is determined by a fast PIN-photodiode (bandwidth approx. 5OGHz) and recorded with a 5OGHz sampling oscilloscope or by an intensity autocorrelator. The use of an optical spectrum analyzer yields information on the spectral properties of the optical output. The complete experimental s","PeriodicalId":280865,"journal":{"name":"International Topical Meeting on Microwave Photonics (MWP1997)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123710922","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":"Ultra-broadband InP-based Photoreceiver With Integrated Travelling Wave Amplifier For 40 Gbit/s Detection","authors":"H. Bach, R. Bertenburg, H. Bulow, G. Jacumeit, G. Mekonnen, A. Umbach, G. Unterborsch, G. Veith, S. van Waasen","doi":"10.1109/MWP.1997.740241","DOIUrl":"https://doi.org/10.1109/MWP.1997.740241","url":null,"abstract":"A monolithic InP-based photoreceiver for h = 1.55 pm is presented. Its opto-electronic conversion capabilities for 40 Gbit/s RZand NRZ-modulated PRBS data streams are demonstrated. Introduction and Overview Advanced TDM transmission systems operate at bit rates up to 40 Gbit/s to manage increasing . traffic on fibre-based communication networks. Although non-return to zero (NRZ) coding is widely applied [I], return to zero (RZ) modulation promises advantages with respect to achievable transmission length along standard fibers compared to the NRZ format [2]. In either case ultra-broadband frontends are needed €or opto-electronic ((YE) signal conversion. A monolithic InP-based opto-electronic receiver (Rx) is presented, which substitutes a commercially available photodiode in a 40 Gbit/s detection experiment on the way to a 40 Gbit/s OEIC technology. The receiver OEIC comprises a waveguide-integrated photodiode and a travelling wave amplifier (TWA) providing additional signal amplification. Its O E power transfer h c t i o n is demonstrated to cover properly the spectral range of a 40 Gbit/s NFZ data stream. In an 40 Gbit/s detection experiment, applying an optical TDM (OTDM) PRBS RZ modulated source, the direct detection of the received 40 Gbit/s pulse sequence by the InP-based photoreceiver is demonstrated. The design of the complete receiver module is described as well as its signal conversion properties for 40 Gbit/s TDM applications. Opto-Electronic Receiver Design for fast TDM Systems For TDM transmission systems, which support the SDH standard, an opto-electronic receiver has to fulfill several requirements in order to guarantee a well opened eye pattern at its output. Photoreceivers are needed which exhibit a flat gain characteristics down to some 10 kHz to ensure the transmission of the frame synchronisation of the synchronous transport modules (STM-1,4, 16, 64 ...). The components of a photoreceiver (photodiode and amplifier stage) should provide both a good power linearity as well as flat conversion properties within the frequency span of the bit rate. Furthermore a group delay time scatter less than 1+151 % of the bit period and an output reflexion factor less than -10 dB over the full bandwidth is desirable [3]. The polarisation sensitivity should not exceed I_+ 1/ dB, e.g., to compensate for the loss of pofarisation orientation in standard fibers and to allow for some pol.arization scrambling of stringed bits in optical multiplexing experiments. Monolithic Photoreceiver The photoreceiver OEIC comprises a photodiode with integrated optical waveguide [4] and a HEMT based travelling wave amplifier, both monolithically integrated on semi-insulating InP substrate [SI. The layer stack of the evanescent field coupled GaInAs pin-photodiode is optimized to achieve an internal quantum efficiency of about 85 % for photodiodes with a size of 5 20 pm'. The transit-time limited electrical 3 -dB bandwidth amounts to 35 GHz. Optical measurements show","PeriodicalId":280865,"journal":{"name":"International Topical Meeting on Microwave Photonics (MWP1997)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128264898","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":"Fiber Optic Millimeter-wave Generation And Bandwidth Efficient Data Transmission For Broadband Mobile 18-20 And 60 GHz-band Communications","authors":"R. Braun, G. Großkopf, D. Rohde, F. Schmidt","doi":"10.1109/MWP.1997.740270","DOIUrl":"https://doi.org/10.1109/MWP.1997.740270","url":null,"abstract":"The optical generation of low-phase noise millimeter-wave signals and OQPSK 140 Mbivs-data transmissions are reported. Quartz stable millimeter-waves at 18-20 GHz and 62.5 GHz are remotely generated by heterodyning the signals of semiconductor lasers.","PeriodicalId":280865,"journal":{"name":"International Topical Meeting on Microwave Photonics (MWP1997)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121062599","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}