Electroabsorption modulators based on bulk gan films and. Electroabsorption modulator performance predicted from bandedge absorption spectra of bulk, quantumwell, and quantumwellintermixed ingaasp structures gordon b. Electroabsorption modulators eams based on the quantum confined stark effect have advantages in applications that require high speed, low drive voltage, and high extinction ratio. Dis crete eams can be copackaged with lasers to form integrated transmitter modules, but eams monolithically integrated with semiconductor lasers are now commercially available at both 1550 nm and 10 nm.
Hvam abstract in this letter, we propose a technique based on heterodyne detection for accurately and simultaneously measuring the amplitude and phase transfer functions of an optical. Gaasalgaas quantumwell electroabsorption modulators forlowa. Waveguidebased electroabsorption modulator performance rubab amin1, jacob b. In both types of devices, the absorption edge at room temperature is dominated by excitonic effects and can be strongly modified through the application of an external electric field. Electroabsorption modulator performance predicted from band. Pulse generation using electroabsorption modulators the next generation telecommunication systems will most likely be based on optical timedivisionmultiplexing otdm. Introduction electroabsorption modulators eam are key compo nents in modern. You can merge pdfs or a mix of pdf documents and other files. An electroabsorption modulator eam is a semiconductor device which can be used for modulating the intensity of a laser beam via an electric voltage. Maximal optical transmission occurs without an electrical bias, which is defined as the on state. Bandwidth and chirp characterisation of wavelength. Electro optic modulators are key components for fiber optic transmission at data rates exceeding 10gbits. In2o3 modulators employ the plasma dispersion effect and the enz enhancement to induce optical absorption.
Bowers abstract in this paper, highspeed travelingwave elec. Travelingwave electroabsorption modulators eams in inpbased materials are attractive devices for optical. We report a novel hybrid integrated optic device consisting of algainasinp electroabsorption modulators and a fourarm silicaonsilicon planar lightwave circuit optical interferometer. Violet to deepultraviolet ingangan and ganalgan quantum structures for uv electroabsorption modulators tuncay ozel, emre sari, sedat nizamoglu, and hilmi volkan demira department of physics, department of electrical and electronics engineering, and nanotechnology. Bowers abstracthighperformanceingaaspinpmultiplequantumwell travelingwave electroabsorption modulators eams have been developed for analog optical links. Eindhoven university of technology master ultrafast. Index change kramers kronig relation one important property of electroabsorption modulators that must be considered is how the changes in the absorption spectrum for the material affect the index of refraction at the operating wavelength. The device is designed for generation of high spectral efficiency optical modulation formats. Slope efficiency and dynamic range of travelingwave. Pdf joiner allows you to merge multiple pdf documents and images into a single pdf file, free of charge. These pdf merging software offer various features, like. These pdf mergers let you merge multiple pdf files easily.
A planar violet electroabsorption modulator and modeling. Electronic and computer engineering, university of limerick, limerick, ireland. Electroabsorption modulator ii device configuration youtube. Pdf differential drive iq modulator based on silicon. Electroabsorption modulators based on bulk gan films and gan. Simulation of traveling wave electroabsorption modulators for phase modulation prasanna ramaswamy promotors. Publishers pdf, also known as version of record includes final page, issue and volume numbers. Integration of a travelingwave electroabsorption modulator with a widely tunable sgdbr laser matthew m.
Osa a hybrid electroabsorption modulator device for. How to merge pdfs and combine pdf files adobe acrobat dc. Electroabsorption modulators are intensity modulators based on absorption in a semiconductor. A planar violet electroabsorption modulator and modeling of electric field effects on zinc oxide excitons. Recent developments and applications in electroabsorption.
Pdf highsaturation highspeed travelingwave ingaaspinp. Pdf we present an electroabsorption modulator based on the enhanced electrooptic effect of an asymmetric coupled triple quantum well actqw to. High speed electroabsorption modulators in generic integration. Analysis of multiquantum well electroabsorption modulators joachim piprek, yijenchiu, and john e. Semiconductor quantum structures and photonic devices. Analysis of multiquantum well electroabsorption modulators joachim piprek, yijen chiu, and john e.
An equivalent rf circuit model for electroabsorption modulators eams is proposed and verified. Application of electroabsorption modulators for highspeed. Oct 04, 20 for the love of physics walter lewin may 16, 2011 duration. Publishers pdf, also known as version of record link back to dtu orbit citation apa. These devices are also very well suited for monolithic integration with semiconduc.
Balanced electroabsorption modulator for highlinearity. Click add files and select the files you want to include in your pdf. A simple device model attributes the threshold voltage of zno ea modulators to the charge screening. A terminating impedance circuit, which is thermally decoupled from a substrate, for an electroabsorption modulator, having a modulator capacitance includes a series resistanceemphasized rf delay line exhibiting an impedance distributed over its length, wherein the spatially distributed impedance has at least a predominant resistance per unit length, an inductance per unit length tuned to the. Urban westergren master dissertation submitted in order to obtain the academic degree of erasmus mundus master of science in photonics royal institute of technology kth, stockholm. The key to the successful molecular beam epitaxial mbe growth of these devices was the incorporation of a linearlygraded buffer layer beneath the ingaasalgaas multiquantumwell active layer. Mason et al 40 gbs tandem electroabsorption modulator 29 fig. Developments here have advanced our physical understanding of bloch oscillation and wannierstark superlattices that were predicted several decades ago but now have become an experimental reality. Eams can be integrated with other devices like laser diodes.
High speed electroabsorption modulator in the generic. Plasmonic modulator using cmoscompatible material platform. Waveguide based electroabsorption modulator performance. In the bulk devices, the applied voltage causes a broadening. In 28th european conference on optical communication, 2002. Opticallyswitched dualdiode electroabsorption modulator. For achieving a high extinction ratio, one usually exploits the quantumconfined stark effect in a quantum well structure. Ultracompact and broadband electroabsorption modulator. Javier romerovivas, aidan meehan and lukasz krzczanowicz optical communications research group, dept.
Travelingwave electroabsorption modulators by shengzhong zhang the transmission bit rates in backbone telecommunication optical fibers are increasing rapidly, motivated by the explosive growth of internet traffic. Jun 17, 2005 to achieve ultrahigh bit rate signal beyond existing etdm technology optical time division multiplexing otdm is been used. The optical transmission can be modulated by applying a negative. Raring2, member, ieee, anna taukepedretti1, student member, ieee, and larry a. Waveguide eams are increasingly being used in optical networks since they can be monolithically integrated with continuouswave cw edgeemitting laser diodes to create lowcost. The monolithic integration of an electroabsorption ea modulator applying the quantum confined stark effect with a distributed feedback dfb laser diode was demonstrated using a novel approach based on a doublestack multiple quantum well mqw structure. We report waveguideintegrated ge electroabsorption modulators operating at 1615nm wavelength with 3db. They are used for telecom data transmitters, for example. Optically controlled electroabsorption modulators for. Monolithic integration of an electroabsorption modulator into a gaasbased duocavity vcsel for resonancefree modulation j.
Electroabsorption modulators based on bulk gan films and ganalgan multiple quantum wells chenkai kao, anirban bhattacharyya, christos thomidis, roberto paiella, and theodore d. Travelingwave multiplequantumwell electroabsorption modulators bin liu, jongin shim, yijen chiu, hsu feng chou, joachim piprek, senior member, ieee, and john e. Its principle of operation is based on the franzkeldysh effect, i. Travelingwave electroabsorption modulators by shengzhong zhang april 1999 a dissertation submitted in partial satisfaction of the requirements for the degree of doctor of philosophy in electrical and computer engineering committee in charge professor john e. At this point mode locked fiber lasers mlfl are the prevalent pulse source used in the. Shi, ultracompact electroabsorption modulators based on tunable epsilonnearzeroslot waveguides, ieee photon.
Bandwidth and chirp characterisation of wavelength conversion. Violet to deepultraviolet ingangan and ganalgan quantum. Moreover, it favorably compares with the to date highest performance links employing lithium niobate crosscoupled machzehnder modulators, proving itself an enabling technology for placement of allsemiconductor radiofrequency lightwave transmitters in high. Balanced electroabsorption modulator for highlinearity, low. Laser diodes integrated with electroabsorption modulators for. Abstract the paper presents a new device for analog optical. Using a thermoreflectance imaging technique, surface temperature of active electroabsorption modulators. Dipartimento di elettronica, politecnico di torino, corso duca degli abruzzi 24, i10129 torino, italy.
Wang school of electrical engineering and computer science, oregon state university, corvallis, or 97331. Shalaev2,6, and alexandra boltasseva2,1 1 dtu fotonik department of photonics engineering, technical university of denmark, oersteds plads 343, dk2800 kgs. Even though this modulation format is heavily in use for. Comparative analysis of transparent conductive oxide. In reverse bias, these devices exhibit a strong electroabsorption optical absorption coef. Electroabsorption modulators are attractive for applications requiring high speed modulation, low drive voltage, high extinction ratio, and integrability. Bowers electrical engineering department, university of california, santa barbara, ca 93106 abstract electroabsorption modulators eams based on the quantum confined stark effect have advantages in appli. Raring, jonathan klamkin, anna taukepedretti, and larry a. Ultracompact and broadband electroabsorption modulator using an epsilonnearzero conductive oxide qian gao,erwen li, and alan x.
Rp photonics encyclopedia electroabsorption modulators. In this chapter we discuss the working principles, waveguide coupling, and the latest progress in ge and gesi electroabsorption modulators eams based on franzkeldysh effect fke and quantum. Results of single channel and dwdm fiber transmission experiments are presented. Selectivelyundercut travelingwave electroabsorption. Electroabsorption modulators integrated with dfb lasers. Electroabsorption modulator integrated light sources for future. Alessandri, chiara, inge asselberghs, steven brems, cedric huyghebaert, joris van campenhout, dries van thourhout, and marianna pantouvaki. Circuit parameters extracted from measured s 11 values for an mqw eam are used to model.
Bowers electrical engineering department, university of california, santa barbara, ca 93106 abstract electroabsorption modulators eams based on the quantum confined stark effect have advantages in. Laser diodes integrated with electroabsorption modulators. Electroabsorption modulators used for alloptical signal processing and labelling. Moustakasa department of electrical and computer engineering and photonics center, boston university, 8 saint marys street, boston, massachusetts 02215, usa. Analog characterization of lowvoltage mqw travelingwave electroabsorption modulators bin liu, member, ieee, jongin shim, member, ieee, yijen chiu, adrian keating, member, ieee, joachim piprek, senior member, ieee, and john e. Coldren b a apogee photonics, 6580 snow drift road, suit 100, allentown, pa. This paper describes the growth and device performance of electroabsorption modulators on gaas substrates operating near 1. Here we present the design, epitaxial growth, fabrication, experimental characterization, and theoretical analysis of our quantum electroabsorption modulators that incorporate 5 nm thick in 0. Electroabsorption modulator nmechanisms franzkeldysh effect nobserved in conventional bulk semiconductors quantumconfined stark effect qcse nquantum well structures nboth of these electroabsorption effects are prominent near the bandgap of semiconductors. Click, drag, and drop to reorder files or press delete to remove any content you dont want.
Highpower operation of electroabsorption modulators nanohub. Bandwidth and chirp characterisation of wavelength conversion based on electroabsorption modulators. They are promising devices for external signal modulation in highbandwidth optical communication systems. Just upload files you want to join together, reorder them with draganddrop if you need and click join files button to merge the documents. Schaevitz,2 emel tasyurek,1 yiwen rong,3 theodore i. Recent progress in electroabsorption modulator integrated distributed feedback eadfb lasers for highspeed data communications is. Applied voltage was obtained both by converting the electric field based on device model and fitting the calculated ea spectra with the first principle calculation and gaussian broadening. Selectivelyundercut travelingwave electroabsorption modulators incorporating a pingaas contact layer matthew m.
Integration of a travelingwave electroabsorption modulator. Chanclou 5 1 xlim, umr cnrs 7252university of limoges, 16 rue atlantis, 87068 limoges, france. Ge and gesi electroabsorption modulators request pdf. They are promising devices for external signal modulation in highbandwidth. Analysis of multiquantum well electroabsorption modulators. Coldren1, fellow, ieee 1university of california santa barbara, ece department, santa barbara, ca 93106 usa. Simulation of traveling wave electroabsorption modulators. Buyers guide products electroabsorption modulators. Heterodyne technique for measuring the amplitude and phase transfer functions of an optical modulator francis p. Gesige asymmetric fabryperot quantum well electroabsorption. The eam is designed with a transmission line electrode and integrated impedance matched termination, such that the response exceeds the rc time constant limitation of traditional lumped element. Sorger1, 1department of electrical and computer engineering, george washington university 800 22nd st. Monolithic integration of an electroabsorption modulator into a gaasbased duo.
A trombone phase shifter was used to align the pulse carver and data encoder drive signals. Apr 18, 2011 ultraviolet electroabsorption modulators based on bulk gan films and on ganalgan multiple quantum wells were developed and characterized. Comparative analysis of transparent conductive oxide electroabsorption modulators invited qian gao, erwen li, and alan x. Electroabsorption modulators used for alloptical signal.
Modeling of machzehnder and electroabsorption modulator pulse generators and extraction of the chirp factor michael j. All these pdf joiners are completely free and can be downloaded to windows pc. Hybrid siliconconductive oxide plasmonic electroabsorption. High speed electroabsorption modulator in the generic photonic integration platform m. Heterodyne technique for measuring the amplitude and phase. Pdf electroabsorption modulator with an asymmetric coupled. Gesige asymmetric fabryperot quantum well electroabsorption modulators elizabeth h. To achieve ultrahigh bit rate signal beyond existing etdm technology optical time division multiplexing otdm is been used. Multiquantum well mqw electroabsorption modulators eams are attractive for applications requiring signal modulation at high speed and with. In these systems stable and compact returntozero rz pulse sources are required. Miller1 1department of electrical engineering, stanford university, stanford, ca 94305, usa 2current address. Bowers department of electrical and computer engineering, university of california santa barbara, santa barbara, ca 93106.
Leijtens 1 1 cobra research institute, eindhoven university of technology, p. The transmission bit rates in backbone telecommunication optical fibers are. Modeling of machzehnder and electroabsorption modulator. Blue quantum electroabsorption modulators based on reversed.
Plasmonic modulator using cmoscompatible material platform viktoriia e. Balanced electroabsorption modulator for highlinearity, lownoise microwave analog optical link f. Electroabsorption modulator performance predicted from. Electroabsorption modulators used for alloptical signal processing and labelling xu, lin publication date. Ultraviolet electroabsorption modulators based on bulk gan films and on ganalgan multiple quantum wells were developed and characterized. High speed silicon modulators huiwen chen, yinghao kuo, john e. As the channel bit rate distance product increases, external modulation of the laser light. Pdf highsaturation power travelingwave electroabsorption modulators tw eams with modulation bandwidth greater than 40 ghz have. Our scalable modulator devices could provide costeffective, lowpower and ultrahighspeed solutions for nextgeneration optical communication networks and microwave photonic systems. Most electroabsorption modulators are made in the form of a waveguide with electrodes for applying an electric field in a direction perpendicular to the modulated light beam.
A simple device model attributes the threshold voltage of zno ea modulators to the charge screening effects caused by the free electrons in the zno active layer. Electroabsorption modulators eams are typically electrically driven to vary the electric field across the device and hence the optical transmission through it 1. Bowers electrical engineering department, university of california, santa barbara, ca 93106 abstract electroabsorption modulators eams based on the quantum con. Electroabsorption modulators eams have been instrumental in achieving ultrafast modulation. Analog characterization of lowvoltage mqw travelingwave. An introduction to electroabsorption modulators is given and several mechanisms that form the basis of electroabsorption are briefly discussed including franzkeldysh effect, quantumconfined stark effect qcse. Simulation of traveling wave electroabsorption modulators for. A planar violet electroabsorption modulator and modeling of. Wang school of electrical engineering and computer science, oregon state university, corvallis, oregon 97331, usa. Laser diodes integrated with electroabsorption modulators for 40gbs data transmission u n i v e r s i t a t u l m s c i e n d o d o c e n d o c u r a n d o ph.
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