{"version":"1.0","provider_name":"INRS","provider_url":"https:\/\/dev.inrs.ca\/en\/","author_name":"inrsadmin","author_url":"https:\/\/dev.inrs.ca\/en\/author\/inrsadmin\/","title":"Jos\u00e9 Aza\u00f1a | INRS","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"unhbp6Bnvx\"><a href=\"https:\/\/dev.inrs.ca\/en\/research\/professors\/jose-azana\/\">Jos\u00e9 Aza\u00f1a<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/dev.inrs.ca\/en\/research\/professors\/jose-azana\/embed\/#?secret=unhbp6Bnvx\" width=\"600\" height=\"338\" title=\"&#8220;Jos\u00e9 Aza\u00f1a&#8221; &#8212; INRS\" data-secret=\"unhbp6Bnvx\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/* ]]> *\/\n<\/script>\n","thumbnail_url":"https:\/\/dev.inrs.ca\/wp-content\/uploads\/2020\/04\/Azana_Jose-inrs.jpg","thumbnail_width":900,"thumbnail_height":708,"description":"Research Interests\u00a0The research interests of Prof. Aza\u00f1a span a wide range of topics in the areas of optics, photonics and microwave engineering, including the following:Ultrafast photonicsAll-optical signal processingAll-optical computingOptical pulse shapingFiber-optics telecommunication systemsMeasurement and characterization of ultrafast optical signals and photonic devicesAll-fiber and integrated waveguide components and devicesLight pulse interferometryAdvanced signal processing analysis applied to optics problemsHigh-frequency microwave waveform generation and processingBiomedical optical imaging\u00a0\u00a0\u00a0Biography\u00a0Prof. Jos\u00e9 Aza\u00f1a was born in Toledo, Spain. He received the Telecommunication Engineer degree (six years engineering program) and a Ph.D. (doctoral) degree in telecommunication engineering from the Universidad Polit\u00e9cnica de Madrid (UPM), Spain, in 1997 and 2001, respectively. He completed part of his PhD research at the University of Toronto, ON, Canada (1999) and the University of California, Davis, CA, USA (2000). From September 2001 to mid 2003 he worked as a Postdoctoral Research Fellow at McGill University Montreal, QC, Canada.\u00a0In 2003, he was appointed as an Assistant Professor at the Institut National de la Recherche Scientifique \u2013 Centre Energie, Mat\u00e9riaux et T\u00e9l\u00e9communications (INRS-EMT) in the Montreal region. He was promoted to Associate Professor in 2006 and to Full Professor in 2010. His research activities are focused on the areas of optics, photonics and microwave engineering.\u00a0\u00a0Scientific Activities\u00a0Recipient of the 2008 Young Investigator Award from IEEE - Photonics Society (formerly LEOS), recognizing outstanding contributions to photonics (broadly defined) by an individual prior to his\/her 35th birthday, \u201cfor pioneer contributions on innovative ultra-fast optical pulse processing techniques, including temporal self-imaging (Talbot) effects, using all-fiber grating technologies.\u201d\u00a0Recipient of the 2009 IEEE Microwave Prize \u201cawarded annually in recognition of the most significant published contribution to the field of interest of the IEEE Microwave Theory and Techniques Society\u201d, for the demonstration of \u2018temporal imaging\u2019 of ultra-wideband (UWB) microwave signals using an entirely electronic system.\u00a0Awarded with the \u201cExtraordinary Prize to the Best Doctoral Thesis\u201d from the Universidad Polit\u00e9cnica de Madrid (UPM), 2003.\u00a0Awarded with the XXII National Prize for the \u201cBest Doctoral Thesis in Telecommunication Networks\u201d from the Association of Telecommunication Engineers of Spain, 2002.\u00a0Guest editor of the special issue on \u201cSignal Analysis Tools for Optical Signal Processing\u201d, published by EURASIP Journal of Applied Signal Processing (July 2005).\u00a0Guest editor of the special issue on \u201cOptical Signal Processing\u201d, published by the IEEE\/OSA Journal of Lightwave Technology (July 2006).\u00a0Recipient of five Strategic Project Grants (SPG), being Principal Investigator in three of these grants, from the Natural Sciences and Engineering Research Council of Canada (NSERC). (2004 - 2010 competitions)\u00a0\u00a0\u00a0Chairs, groups and networks\u00a0(Selected) Collaborations:\u00a0Prof. Mohamed Chaker, Prof. Jean-Claude Kieffer, Prof. Roberto Morandotti, and Prof. Francois L\u00e9gar\u00e9, INRS-EMTProf. Jianping Yao, University of OttawaProf. Stewart Aitchinson, University of TorontoProf. Sophie LaRochelle, Universit\u00e9 LavalProf. Lawrence R. Chen and Prof. David V. Plant, McGill UniversityProf. Raman Kashyap, Ecole Polytechnique de Montr\u00e9alDr. Greg Schinn, Exfo Inc. (Qu\u00e9bec)Dr. Bill Tsounis, Apollo Microwaves Inc. (Montr\u00e9al)Prof. Alejandro Carballar, Universidad de Sevilla, SpainProf. David J. Moss, University of Sydney, AustraliaDr. Michael Strain and Prof. Marc Sorel, University of Glasgow, UKDr. Luca Pot\u00ec, CNIT - Pisa, ItalyProf. Leif Oxenlowe, Denmark Technical UniversityDr. Naum K. Berger and Prof. Baruch Fischer, Technion - Israel Institute of TechnologyDr. Radan Slav\u00edk, University of Southampton, UK\u00a0\u00a0\u00a0Prof. Aza\u00f1a is a Researcher of the Canadian Institute for Photonics Innovation (CIPI), a Network of Centres of Excellence (NCE) funded by the Natural Sciences and Engineering Research Council of Canada (NSERC). He is also a member of 3 Strategic Networks funded by FQRNT (Gov. of Quebec), namely COPL, Plasma-Qu\u00e9bec, and SytaCOM.\u00a0Prof. Aza\u00f1a is a member of IEEE and OSA.\u00a0\u00a0Publications\u00a0Prof. Aza\u00f1a has to his credit more than 450 publications in top scientific journals and leading technical conferences, including more than 120 publications in high-impact peer-review journals and various invited and co-invited presentations in international meetings. Some of his published works have been very highly cited by his peers. In what follows, a representative sample of his peer-review journal publications is presented (listed in inverse chronological order):\u00a0J. Aza\u00f1a, \u201cUltrafast analog all-optical signal processors based on fiber-grating devices,\u201d\u00a0IEEE Photonics Journal, vol. 2, pp. 359-386 (2010).\u00a0[INVITED]\u00a0Y. Park, M. Scaffardi, A. Malacarne, L. Pot\u00ec, J. Aza\u00f1a, \u201cLinear, self-referenced technique for single-shot and real-time full characterization of (sub-)picosecond optical pulses based on balanced electro-optic spectral differentiation,\u201d\u00a0Opt. Lett., vol. 35, pp. 2502-2504 (2010).\u00a0M. H. Asghari, Y. Park, J. Aza\u00f1a, \u201cComplex-field measurement of ultrafast dynamic optical events based on real-time spectral interferometry,\u201d\u00a0Opt. Express, vol. 18, pp. 16526-16538 (2010).\u00a0Y. Park, J. Aza\u00f1a, \u201cUltrahigh dispersion of broadband microwave signals by incoherent photonic processing,\u201d\u00a0Opt. Express, vol. 18, pp. 14752-14761 (2010).\u00a0M. Ferrara, Y. Park, L. Razzari, B. E. Little, S. T. Chu, R. Morandotti, D. J. Moss, J. Aza\u00f1a, \u201cOn-chip CMOS compatible all-optical integrator,\u201d\u00a0Nature Commun.\u00a01:29 doi: 10.1038\/ncomms1028 (2010).\u00a0S. Thomas, A. Malacarne, F. Fresi, L. Pot\u00ec, A. Bogoni, J. Aza\u00f1a, \u201cFiber-based programmable picosecond arbitrary optical pulse shaper,\u201d\u00a0IEEE\/OSA J. Lightwave Technol., vol. 28, pp. 1832-1843 (2010).\u00a0M. H. Asghari, C. Wang, J. Yao, and J. Aza\u00f1a, \u201cHigh-order passive photonic temporal integrators,\u201d\u00a0Opt. Lett., vol. 35, pp. 1191-1193 (2010).\u00a0Y. Park, M. Scaffardi, L. Pot\u00ec, J. Aza\u00f1a, \u201cSimultaneous single-shot real-time measurement of the instantaneous frequency and phase profiles of wavelength-division-multiplexed signals,\u201d\u00a0Opt. Express, vol. 18, pp. 6220-6229 (2010).\u00a0F. Li, Y. Park, J. Aza\u00f1a, \u201cLinear characterization of optical pulses with durations ranging from the picosecond to the nanosecond regime using ultrafast photonic differentiation,\u201d\u00a0IEEE\/OSA J. Lightwave Technol., vol. 27, pp. 4623-4633 (2009).\u00a0L.-M. Rivas, S. Boudreau, Y. Park, R. Slav\u00edk, S. LaRochelle, A. Carballar, J. Aza\u00f1a, \u201cExperimental demonstration of ultrafast all-fiber high-order temporal differentiators,\u201d\u00a0Opt. Lett., vol. 34, pp. 1792-1794 (2009).\u00a0Y. Park, J. Aza\u00f1a, \u201cUltrafast photonic intensity integrator,\u201d\u00a0Opt. Lett., vol. 34, pp. 1156-1158 (2009). [Featured in the \u2018Newsbreaks\u2019 section of\u00a0Laser Focus World, June 2009]\u00a0S. Thomas, A. Malacarne, F. Fresi, L. Pot\u00ec, A. Bogoni, J. Aza\u00f1a, \u201cDemonstration of a programmable fiber-based picosecond optical pulse shaper using time-domain binary phase-only linear filtering,\u201d\u00a0Opt. Lett., vol. 34, pp. 545-547 (2009).\u00a0Y. Park, T.-J. Ahn, J. Aza\u00f1a, \u201cReal-time complex temporal response measurements of ultrahigh-speed optical modulators,\u201d\u00a0Opt. Express, vol. 17, pp. 1734-1745 (2009).\u00a0M. H. Asghari, J. Aza\u00f1a, \u201cAll-optical Hilbert transformer based on a single phase-shifted fiber Bragg grating: Design and analysis,\u201d\u00a0Opt. Lett., vol. 34, pp. 334-336 (2009).\u00a0F. Li, Y. Park, J. Aza\u00f1a, \u201cGroup delay characterization of dispersive devices using a simple temporal intensity measurement setup,\u201d\u00a0IEEE Photon. Technol. Lett., vol. 20, pp. 2042-2044 (2008).\u00a0R. Slav\u00edk, Y. Park, N. Ayotte, S. Doucet, T.-J. Ahn, S. LaRochelle, J. Aza\u00f1a, \u201cPhotonics temporal integrator for all-optical computing,\u201d\u00a0Opt. Express, vol. 16, pp. 18202-18214 (2008).\u00a0Y. Park, T.-J. Ahn, Y. Dai, J. Yao, J. Aza\u00f1a, \u201cAll-optical temporal integration of ultrafast pulse waveforms,\u201d\u00a0Opt. Express, vol. 16, pp. 17817-17825 (2008).\u00a0L.-M. Rivas, M. Strain, D. Duchesne, A. Carballar, M. Sorel, R. Morandotti, J. Aza\u00f1a, \u201cPicosecond linear optical pulse shapers based on integrated waveguide Bragg gratings,\u201d\u00a0Opt. Lett., vol. 33, pp. 2425-2427 (2008).\u00a0I. Arnedo, J. D. Schwartz, M. A. G. Laso, T. Lopetegui, D. V. Plant, J. Aza\u00f1a, \u201cPassive microwave planar circuits for arbitrary UWB pulse shaping,\u201d\u00a0IEEE Microwave & Wireless Component Lett., vol. 18, pp. 452-454 (2008).\u00a0L. K. Oxenlowe, R. Slav\u00edk, M. Galili, H.C.M. Mulvad, A. T. Clausen, Y. Park, J. Aza\u00f1a, P. Jeppesen, \u201c640 Gbit\/s timing jitter tolerant data processing using a long-period fiber grating-based flat-top pulse shaper,\u201d\u00a0IEEE J. Sel. Top. Quantum Electron., vol. 14, pp. 566-572 (2008).\u00a0K. Yiannopoulos, S. Thomas, J. Aza\u00f1a, \u201cAmplitude\/timing jitter and peak-to-peak amplitude variation optimal rate multipliers,\u201d\u00a0IEEE\/OSA J. Lightwave Technol., vol. 26, pp. 899-907 (2008).\u00a0J. Aza\u00f1a, Y. Park, T.-J. Ahn, F. Li, \u201cSimple and highly sensitive optical pulse characterization method based on electro-optic spectral signal differentiation,\u201d\u00a0Opt. Lett., vol. 43, pp. 437-439 (2008).\u00a0T.-J. Ahn, Y. Park, D. J. Moss, S. Ramachandran, J. Aza\u00f1a, \u201cFrequency-domain modal delay measurement for higher-order mode fiber based on stretched pulse interference,\u201d\u00a0Opt. Lett., vol. 33, pp. 19-21 (2008).\u00a0J. Aza\u00f1a, \u201cProposal of a uniform fiber Bragg grating as an ultrafast all-optical integrator,\u201d\u00a0Opt. Lett., vol. 33, pp. 4-6 (2008).\u00a0F. Li, Y. Park, J. Aza\u00f1a, \u201cComplete temporal pulse characterization using phase reconstruction based on optical ultrafast differentiation (PROUD),\u201d\u00a0Opt. Lett., vol. 32, pp. 3364-3366 (2007).\u00a0T.-J. Ahn, Y. Park, J. Aza\u00f1a, \u201cFast and accurate group delay ripple measurement technique for ultra-long chirped fiber Bragg gratings,\u201d\u00a0Opt. Lett., vol. 32, pp. 2674-2676 (2007).\u00a0Y. Park, M. H. Asghari, T.-J. Ahn, J. Aza\u00f1a, \u201cTransform-limited picosecond pulse shaping based on coherence synthesization\u201d,\u00a0Opt. Express, vol. 15, pp. 9584-9599 (2007).\u00a0Y. Park, T.-J. Ahn, J.-C. Kieffer, J. Aza\u00f1a, \u201cOptical frequency domain reflectometry based on real-time Fourier transformation\u201d,\u00a0Opt. Express, vol. 15, pp. 4597-4616 (2007).\u00a0Y. Park, J. Aza\u00f1a, R. Slav\u00edk, \u201cUltrafast all-optical first and higher-order differentiators based on interferometers\u201d,\u00a0Opt. Lett., vol. 32, pp. 710-712 (2007).\u00a0N. K. Berger, B. Levit, B. Fischer, M. Kulishov, D.V. Plant, J. Aza\u00f1a, \u201cTemporal differentiation of optical pulses using a phase-shifted fiber Bragg grating\u201d,\u00a0Opt. Express, vol. 15, pp. 371-381 (2007).\u00a0J. D. Schwartz, J. Aza\u00f1a, D. V. Plant, \u201cA fully-electronic system for the time magnification of ultra-wideband signals\u201d,\u00a0IEEE Trans. Microw. Theory and Techn., vol. 55, pp. 327-334 (2007).\u00a0 [2009 IEEE Microwave Prize]\u00a0Y. Park, M. Kulishov, R. Slav\u00edk, J. Aza\u00f1a, \u201cPicosecond and sub-picosecond flat-top waveform generation using uniform long-period fiber gratings\u201d,\u00a0Opt. Express, vol. 14, pp. 12670-12678 (2006).\u00a0R. Slav\u00edk, Y. Park, M. Kulishov, R. Morandotti, J. Aza\u00f1a, \u201cUltrafast all-optical differentiators\u201d,\u00a0Opt. Express, vol. 14, pp. 10699-10707 (2006).\u00a0J. Aza\u00f1a and S. Gupta, \u201cComplete family of periodic Talbot filters for pulse repetition rate multiplication\u201d,\u00a0Opt. Express, vol. 14, pp. 4270-4279 (2006).\u00a0J. Aza\u00f1a, N. K. Berger, B. Levit, V. Smulakovsky, B. Fischer, \u201cReconfigurable generation of high-repetition-rate optical pulse trains based on time-domain phase-only filtering\u201d,\u00a0Opt. Lett., vol. 30, pp. 3228-3230 (2005).\u00a0M. Kulishov, J. Aza\u00f1a, \u201cLong-period fiber gratings as ultrafast optical differentiators\u201d,\u00a0Opt. Lett., vol. 30, pp. 2700-2702 (2005).\u00a0J. Aza\u00f1a, C. Wang, L. R. Chen, \u201cSpectral self-imaging phenomena in sampled Bragg gratings\u201d,\u00a0J. Opt. Soc. Am. B, vol. 22, pp. 1829-1841 (2005).\u00a0J. Magn\u00e9, P. Giaccari, S. LaRochelle, J. Aza\u00f1a, L. R. Chen, \u201cAll-fiber comb filter with tunable free-spectral-range\u201d,\u00a0Opt. Lett., vol. 30, pp. 2062-2064 (2005).\u00a0M. Kulishov, J. Aza\u00f1a, \u201cUltrashort pulse propagation in uniform and non-uniform waveguide long-period gratings\u201d,\u00a0J. Opt. Soc. Am. A, vol. 22, pp. 1319-1333 (2005).\u00a0J. Aza\u00f1a, \u201cWigner analysis of linear and nonlinear pulse propagation in optical fibers\u201d,\u00a0EURASIP J. Appl. Signal Proc.\u00a02005, Issue 10, pp. 1554-1565 (2005). [INVITED]\u00a0J. Aza\u00f1a, \u201cSpectral Talbot phenomena of frequency combs induced by cross-phase-modulation in optical fibers\u201d,\u00a0Opt. Lett., vol. 30, pp. 227-229 (2005).\u00a0J. Aza\u00f1a, N. K. Berger, B. Levit, B. Fischer, \u201cA simplified system configuration for temporal imaging of optical pulses\u201d,\u00a0IEEE Photon. Technol. Lett., vol. 17, pp. 94-96 (2005).\u00a0J. Aza\u00f1a, N. K. Berger, B. Levit, V. Smulakovsky, B. Fischer, \u201cFrequency shifting of microwave signals using a general self-imaging (Talbot) effect in optical fibers\u201d,\u00a0Opt. Lett., vol. 29, pp. 2849-2851 (2004).\u00a0C. Wang, J. Aza\u00f1a, L. R. Chen \u201cSpectral Talbot-like phenomena in one-dimensional photonic bandgap structures\u201d,\u00a0Opt. Lett., vol. 29, pp. 1590-1592 (2004).\u00a0J. Aza\u00f1a, N. K. Berger, B. Levit, B. Fischer, \u201cSpectral Fraunhofer regime: time-to-frequency mapping by the action of a single time lens on an optical pulse\u201d,\u00a0Appl. Opt., vol. 43, pp. 483-490, (2004).\u00a0P. Dong, J. Aza\u00f1a, A. G. Kirk, \u201cSynthesis of fiber Bragg grating parameters from reflectivity by means of a simulated annealing algorithm\u201d,\u00a0Opt. Comm., vol. 228, pp.303-308 (2003).\u00a0J. Aza\u00f1a, \u201cDesign specifications of a time-domain spectral shaping optical system based on dispersion and temporal modulation\u201d,\u00a0Electron. Lett., vol. 39, pp. 1530-1532, (2003).\u00a0J. Aza\u00f1a, L.R. Chen, \u201cGeneral temporal self-imaging phenomena\u201d,\u00a0J. Opt. Soc. Am. B, vol. 20, pp. 1447-1458 (2003).\u00a0J. Aza\u00f1a, R. Slav\u00edk. P. Kockaert, L.R. Chen, S. LaRochelle, \u201cGeneration of customized ultrahigh repetition rate pulse sequences using superimposed fiber Bragg gratings\u201d,\u00a0IEEE\/OSA J. Lightwave Technol., vol. 21, pp. 1490-1498 (2003).\u00a0J. Aza\u00f1a, P. Kockaert, R. Slav\u00edk, L.R. Chen, S. LaRochelle, \u201cGeneration of a 100-GHz optical pulse train by pulse repetition rate multiplication using superimposed fiber Bragg gratings\u201d,\u00a0IEEE Photon. Technol. Lett., vol. 15, pp. 413-415 (2003).\u00a0J. Aza\u00f1a, \u201cTemporal self-imaging effects for periodic optical pulse sequences of finite duration\u201d,\u00a0J. Opt. Soc. Am. B, vol. 20, pp. 83-90 (2003).\u00a0J. Aza\u00f1a, L. R. Chen, \u201cSynthesis of temporal optical waveforms using fiber Bragg gratings: A new approach based on space-to-frequency-to-time mapping\u201d,\u00a0J. Opt. Soc. Am. B, vol. 19, pp. 2758-2769 (2002).\u00a0J. Aza\u00f1a, M. A. Muriel, \u201cTechnique for simultaneously multiplying the repetition rate of multiwavelength optical pulse trains\u201d,\u00a0IEEE Photon. Technol. Lett., vol. 13, pp. 1358-1360 (2001).\u00a0 [Featured in\u00a0WDM Solutions, April 2002]\u00a0J. Aza\u00f1a, M. A. Muriel, \u201cSimultaneous multi-wavelength real-time optical spectrum analysis\u201d,\u00a0Appl. Opt., vol. 40, pp. 3831-3842 (2001).\u00a0J. Aza\u00f1a, M. A. Muriel, \u201cTemporal self-imaging effects: theory and application for multiplying pulse repetition rates\u201d,\u00a0IEEE J. Sel. Top. Quantum Electron., vol. 7, pp. 728 \u2013 744 (2001).\u00a0J. Aza\u00f1a, M. A. Muriel, L. R. Chen, P.W.E. Smith, \u201cFiber Bragg grating period reconstruction using time-frequency signal analysis and application to distributed sensing\u201d,\u00a0IEEE\/OSA J. Lightwave Technol., vol. 19, pp.646-654 (2001).\u00a0J. Aza\u00f1a, M. A. Muriel, \u201cReconstructing arbitrary strain distributions within fiber gratings by time-frequency signal analysis\u201d,\u00a0Opt. Lett., vol. 24, pp. 698-700 (2000).\u00a0J. Aza\u00f1a, M. A. Muriel, \u201cReal-time optical spectrum analysis based on the time-space duality in chirped fiber gratings\u201d,\u00a0IEEE J. Quantum Electron., vol. 36, pp. 517-526 (2000).\u00a0J. Aza\u00f1a, L. R. Chen, M. A. Muriel, Peter W. E. Smith, \u201cExperimental demonstration of real-time Fourier transformation using linearly chirped fiber Bragg gratings\u201d,\u00a0Electron. Lett., vol. 35, pp. 2223-2224 (1999).\u00a0J. Aza\u00f1a, M. A. Muriel, \u201cTechnique for multiplying the repetition rate of periodic trains of pulses by means of a temporal self-imaging effect in chirped fiber gratings\u201d,\u00a0Opt. Lett., vol. 24, pp. 1672-1674 (1999)."}