Electroabsorption modulators based on bulk gan films and. Performing organization names and addresses university of california at san diego 9500. Osa high speed gesi electroabsorption modulator at 1550 nm. We demonstrate a high speed gesi electroabsorption ea modulator monolithically integrated on 3 m silicononinsulator soi waveguide.
High speed electroabsorption modulator in the generic photonic integration platform m. The i layer, thickness d i, was fully depleted at zero bias and for simplicity it was assumed that the applied voltage, v, produced a field, f, in this layer such that f v d i. Wideband electroabsorption modulator for analog applications 5c. Pdf novel bias control of electroabsorption waveguide modulator. The franzkeldysh effect is utilized for highlinearity, electroabsorptive ingaasp waveguide modulators. A modulator structure consisting of a rib channel guide containing a pin diode as shown in the schematic crosssection representation of fig. A semiconductor heterojunction, guidedwave, electroabsorption modulator. 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. The demonstrated device has a compact active region of 1. Low driving voltage bandfillingbased iiivonsilicon electroabsorption modulator qiangsheng huang,1,2 yingchen wu,2,3 keqi ma,1 jianhao zhang,1 weiqiang xie,2 xin fu,1,2 yaocheng shi,1 kaixuan chen,4 jianjun he,3 dries van thourhout,2 gunther roelkens,2 liu liu,4,a and sailing he1,4,a 1centre for optical and electromagnetic research, state key laboratory for modern optical instrumentation.
An electroabsorption modulator eam is a semiconductor device which can be used for modulating the intensity of a laser beam via an electric voltage. 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. Ultraviolet electroabsorption modulators based on bulk gan. The operating bandwidth can be broadened to more than 90 nm by an aln block assisted. Semiconductor electroabsorption waveguide modulator for. Introduction electroabsorption modulators eams are attractive for applications requiringhigh speed modulation, low drive voltage, high extinction ratio and integratibility with lasers. Chirp characteristics of 10gbs electroabsorption modulator integrated dfb lasers. Low driving voltage bandfillingbased iiivonsilicon electroabsorption modulator qiangsheng huang,1,2 yingchen wu,2,3 keqi ma,1 jianhao zhang,1 weiqiang xie,2 xin fu,1,2 yaocheng shi,1 kaixuan chen,4 jianjun he,3 dries van thourhout,2 gunther roelkens,2 liu liu,4,a and sailing he1,4,a 1centre for optical and electromagnetic research, state key laboratory for modern. Design of a franzkeldysh effect electroabsorption waveguide.
With the modulator, your accompanists wont need to carry an extra book of transitions to shuffle around between songs. Modeling of machzehnder and electroabsorption modulator pulse generators and extraction of the chirp factor michael j. Vaernewyck, renato, xin yin, jochen verbrugghe, guy torfs, xingzhi qiu, efstratios kehayas, and johan bauwelinck. Low driving voltage bandfillingbased iiivonsilicon electroabsorption modulator qiangsheng huang,1,2 yingchen wu,2,3 keqi ma,1 jianhao zhang,1 weiqiang xie,2 xin fu,1,2 yaocheng shi,1 kaixuan chen,4 jianjun he,3 dries van thourhout,2. The device provides a twowireserial interface which allows digital control of the modulation and bias currents, eliminating the need for external components. Electrodes configured for interconnection to an external voltage source produce an electric field within the waveguide. Its principle of operation is based on the franzkeldysh effect, i. Electro optic modulator pdf download november 26, 2017 c16eaae032 3 modulator in a zcut linbo modulatormaurice stanley, pat bmodulator design electrooptic and optical properties table 7. An electroabsorption modulator, wherein the semiconductor has a material composition comprising ga x as y p 1y x 0.
Modeling of machzehnder and electroabsorption modulator. In this paper, a travelling wave electroabsorption modulators tweams based on asymmetric intrastepbarrier coupled double strained quantum wells aicdsqw active layer is designed and analyzed at 1. Chiu, design and fabrication of optical electroabsorption modulator for high speed and high efficiency, in 2015 14th international conference on optical communications and networks icocn ieee, nanjing, 2015, pp. You can print just what they need and place it in their binder alongside the current music selections, or they can prop up a mobile device and view transitions on a whim. 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. Frequency modulation software free download frequency. Electroabsorption modulator ii device configuration duration. Optical comb generator with flattopped spectral response. Jp3880868b2 electroabsorption modulated laser with high. For achieving a high extinction ratio, one usually exploits the quantumconfined stark effect in.
Each channel has integrated coding blocks, transforming a nonreturntozero input signal into a 3level electrical duobinary signal to achieve an optical duobinary modulation. Electroabsorption modulator performance predicted from band. Pdf chirp characteristics of 10gbs electroabsorption. Concise rf equivalent circuit model for electroabsorption. Here, a partially reflecting mirror is grown on the front of the reflectiontype electroabsorption modulator creating a fabryperot etalon around the mqw structure. We present the design of an adiabatic taper coupled ge1. Pdf wideband electroabsorption modulator for analog. The gigahertz graphene modulator demonstrates a strong electroabsorption modulation of 0.
Modulation is based on the electricfieldenhanced absorption near the semiconductor band. Waveguidebased electroabsorption modulator performance. This franzkeldysh effect modulator has a 3dbe bandwidth exceeding 20 ghz, a fibertofiber optical insertion loss of less than 9 db, and a high modulation efficiency equivalent switching voltage less. Electroabsorption dynamics in an ingaaspingaasp superlattice modulator. An equivalent rf circuit model for electroabsorption modulators eams is proposed and verified. Optically controlled electroabsorption modulators for. Sorger1, 1department of electrical and computer engineering, george washington university, 800 22nd st. High dynamic range in electroabsorption modulator for.
Wideband electroabsorption modulator for analog applications. Realtime 100 gbs nrz and edb transmission with a gesi electroabsorption modulator for shortreach optical interconnects. A low power 2 x 28 gbs electroabsorption modulator driver. Alloptical wavelength conversion and signal regeneration. Us5165105a separate confinement electroabsorption modulator. Prior art keywords waveguide region electroabsorption modulator buffer transit prior art date 20160707 legal status the legal status is an assumption and is not a legal conclusion.
Low driving voltage bandfillingbased iiivonsilicon. The waveguide includes a relatively thin and offcenter undoped electroabsorbing layer within a lightguiding region. Alloptical wavelength conversion and signal regeneration using an electroabsorption modulator sune hojfeldt, svend bischoff, and jesper mork abstract alloptical wavelength conversion and signal regeneration based on crossabsorption modulation in an ingaasp quantum well electroabsorption modulator eam is studied at different bit rates. Monolithic integration of electroabsorption modulator and. 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. A graphenebased broadband optical modulator nature. As an electroabsorption modulator, a fiber optic link with a. As the channel bit rate distance product increases, external modulation of the laser light. A tof depth imaging system for providing a depth image of an object is provided comprising a light source configured to illuminate an object with amplitude modulated light characterized by a wavelength. Electroabsorption modulator ii device configuration. Javier romerovivas, aidan meehan and lukasz krzczanowicz optical communications research group, dept. Monolithic integration of electroabsorption modulator and dfb.
Balanced electroabsorption modulator for highlinearity. The paper presents a new device for analog optical links, the balanced electroabsorption modulator, to allow the simultaneous cancellation of laser relative intensity noise, all evenorder distortions, and third order intermodulation. Especially, the monolithic integration of mqw dfb lasers and electroabsorption modulators has been intensively investigated due to high coupling efficiency, low drive voltage. Electroabsorption modulator laser diode driver features a. Twotome rf measurements are performed in which the dc bias is adjusted to maximize the spuriousfree linear dynamic range. Realtime 100 gbs nrz and edb transmission with a gesi. Monolithic integration of a laser diode ld or semiconductor optical amplifier and an electroabsorption modulator eam with a spotsize converter ssc output ldeamssc is very attractive for transmitter modules in optical fiber communication systems for its lowcost packaging due to its large spot size, which is well matched to that of a singlemode fiber smf. Analysis of multiquantum well electroabsorption modulators. Us10254407b2 electroabsorption modulator for depth. Itobased electroabsorption modulator for photonic neural. Dipartimento di elettronica, politecnico di torino, corso duca degli abruzzi 24, i10129 torino, italy. Citation download citation yitong li, wen zhou, youwei chen, yuanxiang chen, yongtao huang, kaile li, jianguo yu, and geekung chang optical comb generator with flattopped spectral response using one electroabsorptionmodulated laser and one phase modulator, optical engineering 591, 016112 20 january 2020. Electronic and computer engineering, university of limerick, limerick, ireland.
Balanced electroabsorption modulator for highlinearity, lownoise microwave analog optical link f. 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. Balanced electroabsorption modulator for highlinearity, low. Especially, the monolithic integration of mqw dfb lasers and electroabsorption modulators has been intensively investigated due to high coupling efficiency, low drive voltage, and low packaging costs. To the best of our knowledge this is the fastest modulator driver including onchip duobinary encoding and precoding.
An electroabsorption modulator eam has generally a shorter length andor low v pp than an electrooptic modulator eom such as a machzehnderinterferometer mzi type because the strong electroabsorption change near the bandedge wavelength can be utilized for intensity modulation. Electroabsorption modulators based on bulk gan films and gan. Design of a novel periodic asymmetric intrastepbarrier. The i layer, thickness d i, was fully depleted at zero bias and for simplicity it was assumed that the applied voltage, v, produced a field, f, in this layer such that fvd i.
In both types of devices, the absorption edge at room temperature is dominated by excitonic effects and can be strongly modi. The orbitals twelve effect types, nine adjustable parameters, plus internal or external modulation control were designed to send your tone into sonic orbit. Coldren b a apogee photonics, 6580 snow drift road, suit 100, allentown, pa. The rf photonic link employing the new balanced modulator shows great improvement in the overall link performance. Ultralowenergy electroabsorption modulator consisting of. As an electroabsorption modulator, a fiber optic link with a 17. An electroabsorption modulator or electroabsorption modulator is a semiconductor device which can be used for controlling modulating the intensity of a laser beam via an electric voltage intensity modulators. We report a fivechannel wdm modulator module that heterogeneously integrates a 1. The modulator has a broad operating wavelength range of 35 nm and a 3 db bandwidth of 40. Electroabsorption modulator performance predicted from bandedge absorption spectra of bulk, quantumwell, and quantumwellintermixed ingaasp structures gordon b. Frequency modulation software free download frequency modulation top 4 download offers free software downloads for windows, mac, ios and android computers and mobile devices. Rp photonics encyclopedia electroabsorption modulators. Us10254407b2 electroabsorption modulator for depth imaging. The single channel waveguide modulator shown in figure 8.
Proposal for quantumdot electroabsorption modulator. A novel structure for electroabsorption modulator at 1. The realization of the module on a hybrid silicon photonic platform allows in a next step to. Leijtens 1 1 cobra research institute, eindhoven university of technology, p. The orbital modulator is a supercompact, durable, and highly flexible multieffects pedal with a dynamic collection of precisionengineered phaser, flanger, chorus, and tremolo effects.
If youre looking for a free download links of fiber optic communications 5th edition pdf, epub, docx and torrent then this site is not for you. Pdf proposal for quantumdot electroabsorption modulator. Various forms of the eam with a iiiv waveguide and a groupiv waveguide have. Oct 04, 20 electroabsorption modulator ii device configuration duration. An integrated 2 x 28 gbs dualchannel duobinary driver ic is presented. Eams naturally lend themselves to remote assemblies and large array antennae systems due to their size and weight. Another important class of electroabsorption modulator is the asymmetric fabryperot modulator. The device includes a rib waveguide fabricated on a substrate. Circuit parameters extracted from measured s 11 values for an mqw eam are used to model. A low power 2 x 28 gbs electroabsorption modulator driver array with onchip duobinary encoding. Circuit parameters extracted from measured s 11 values. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.
The intrastepbarrier in the structure provides a high optical saturation power due to delayed red shift. High speed electroabsorption modulator in the generic. Novel bias control of electroabsorption waveguide modulator. Download fiber optic communications 5th edition pdf ebook.
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