The simulator is used mainly for investigation of performance of ad. It is fairly simple to simulate dual drive mzm, you can either refer to this book. Study theoretically and numerically the machzehnder interferometer optical filter which we use. Integrated machzehnder interferometerbased modulators for. The advantages and applications of the machzehnder. Simulation and results matlab codes are used to simulate gsm signal at 900 mhz band at a data rate of 270. Communications systems, matlab simulink simulation, optical communications. The corresponding transfer chart is depicted by black curve in fig. Effect of radiation on a machzehnder interferometer silicon. A recirculating delayed selfheterodyne method using a machzehnder modulator for khzlinewidth measurement. Experimental parametric study of a silicon photonic modulator enabled 112gbs pam transmission system with a dac and adc. Bbs4 protocol by qpsk modulation using dualelectrode. One way to communicate a message signal whose frequency spectrum does not fall within that fixed frequency range, or one that is otherwise unsuitable for the channel, is to alter a transmittable signal according to the information in your message signal.
The output is a result of interference, ranging from. Overlop between the phase obtained with matlab and vpi pag. Osa 108 gbits plasmonic machzehnder modulator with. Zehnder modulator international journal of innovative science.
Kubo and others published development of a machzehnder modulator photonic local oscillator source find. I want to know about mach zehnder modulator and machzehnder interferometer and what is. Beamlab consists of two toolboxes, the beam propagation toolbox and mode solver toolbox. External modulators and mathematical modeling ofmach zehnder. Harmonic distortion analysis of a machzehnder intensity. The interferometer has been used, among other things, to measure phase shifts between the two beams caused by a sample or a change in length of one of the paths. In multirate processing mode, the input and output signals have different port sample times. Mach zehnder modulator, radio over fiber, linbo 3, amplitude modulation, phase modulation, double sideband with optical carrier suppression. Amplitude modulators basically consist of an electrooptic modulator followed by a polarizer. Large signal analysis of mach zehnder modulator intensity response in a linear dispersive fiber j m b oliveira1. Machzehnder modulator drivers jsx series features specifically designed for fiber optic applications standard models for 10, 10. I need to convert a gfdm signal into optical signal with mach zehnder modulator. Javier romerovivas, aidan meehan and lukasz krzczanowicz optical communications research group, dept. Analysis of machzehnder interferometer with one arm loaded.
Multirate processing with oqpsk modulator block matlab. External modulators and, electrooptic machzehnder modulator ijaist. A machzehnder modulator is used for controlling the amplitude of an optical wave. To understand how it works and how to optimize its design, you can use the comsol simulation software. The dual parallel mach zehnder dpmz modulator is ideally suited for use in metro, longhaul lh and ultra longhaul ulh optical transport applications. By using a dualelectrode mach zehnder modulator for optical phase modulation, the assignment of the one of the. In coherent optical systems, intradyne reception is employed.
Analysis of machzehnder interferometer with one arm. We report on highextinctionratio, ultrafast plasmonic machzehnder modulators. We can enhance the bandwidth of the response by using thin substrate. Modeling of machzehnder and electroabsorption modulator pulse generators and extraction of the chirp factor michael j. Home forums system difference between machzehnder modulator and mach zehnder interferometer difference between machzehnder modulator and mach zehnder interferometer nagesh kuknoor joined april 2016 participant hello optiwave.
Modeling of mach zehnder and electroabsorption modulator pulse generators and extraction of the chirp factor michael j. Practical challenges for implementing this method with a silicon machzehnder modulator are discussed, but the analysis is general to other material platforms. Machzehnder michelson sagnac interferometer fabryperot interferometer interferometers is an optical instrument that splits a wave into two waves using a beam splitter and delays them by unequal distances, redirect them using mirrors, recombine them using another beam splitter and detect the intensity of their superposition. The input waveguide is split up into two waveguide interferometer arms. I want to know about mach zehnder modulator and machzehnder interferometer and what is the basic. The relative phase change is imposed by an electrically controlled. The technique based on combining a mach zehnder modulator and a doublemicro ring all pass filter in one of its arms exhibits much smaller nonlinear distortion than the standard mach zehnder modulator. Such a modulator is called machzehnder intensity electrooptic modulator or simply machzehnder modulator mzm. Bbs4 protocol by qpsk modulation using dualelectrode mach.
With the aim to get harmonic distortion characteristics and frequency components of modulated output signals of a machzehnder mz intensity modulator, this paper analyzes the optical intensity modulation transfer function by tailor expandsion method according with the working principle of modulator. To illustrate this effect, we analyze our transmission system in matlab. Large signal analysis of machzehnder modulator intensity. External modulators and mathematical modeling ofmach. Mzm, machzehnder modulator, intensity modulation, mzm drift. Svarny t advances in robotics, mechatronics and circuits. In this paper, we propose a novel and flexible 16quadrature amplitude modulation 16qam transmitter based on cascaded dualparallel machzehnder modulator dpmzm and phase modulator pm. The machzehnder interferometer, invented over one hundred years ago, is still used for many optical measurements.
As an example, conventional pndepletiontype modulators require. Keep it simple dont use too many different parameters. The second option is using the linb machzehnder modulator which is a more detailed model. Complex phase biasing of silicon machzehnder interferometer. Optimizing machzehnder modulator designs with comsol. Experimental parametric study of a silicon photonic modulator enabled 112gbs pam transmission system with a dac and adc posted on january 28, 2016 by matlab projects a packaged silicon photonic traveling wave mach zehnder modulator operating at 10 nm is presented and studied. Intensity distribution in the machzehnder modulator stacked xy slices about beamlab beamlab is an awardwinning set of simulation tools for beam propagation through optical devices and waveguides in your familiar matlab environment. If a voltage is applied across one of the arms, a phase shift is induced for the wave passing through that arm. Integrated inp machzehnder modulators for 100 gbit. Cpmmodulatorname,value creates a cpm modulator object, h. Frequency response of each machzehnder interferometer is also very important to achieve highspeed signals. Fiber rof system employing the mach zehnder modulator mzm as external modulator is done. Spm enabled pam transmission system with a dac and adc. I used dual drive mach zehnder modulator component to make a.
Electronic and computer engineering, university of limerick, limerick, ireland. Access to the travelled distance physical or optical of any waveguide offering a quick way to. Using this model, you can define the insertion loss, extinction ratio, v. The transfer function mach zehnder interferometer with one arm loaded with double micro ring resonator is. Maldonado department of electrical engineering the uni y ersity of texas at arlington arlington, texas 1 3. A machzehnder modulator mzm, which is driven by a 10gbps dpsk data stream, is used to modulate the light to generate a. Modulator basics machzehnder interferometer modulator vt electrode a b in c out d b linbo 3 eo substrate a.
Development of an 80 gbits inpbased machzehnder modulator. Machzehnder interferometer based on allfiber multimode. Optical simulation of a machzehnder modulator beamlab. The machzehnder modulator is a type of optical modulator used for communication applications. The relative phase change is imposed by an electrically controlled index of refraction. Maximization theory in which the pdf of the obtained. Use the modulator object to create a modulator element.
Modulation of 87 gbaud was demonstrated with a dualparallel machzehnder modulator. A lowvoltage 35ghz silicon photonic modulatorenabled ts. A lowvoltage 35ghz silicon photonic modulatorenabled 112gbs transmission system digital signal processing is applied at the transmitter and receiver. Separate search groups with parentheses and booleans.
We present a silicon photonic travelingwave machzehnder modulator operating near 1550 nm with a 3db bandwidth of 35 ghz. Modulator basics mach zehnder interferometer modulator vt electrode a b in c out d b linbo 3 eo substrate a waveguide. The intensity modulator parameter of interest is the transmission t 5 i o i i, the ratio of output to input intensity. Practical challenges for implementing this method with a silicon mach zehnder modulator are discussed, but the analysis is general to other material platforms. The modulator controls the amplitude of an optical wave as it passes through the device. The incoming light is split into two branches, different phase shifts applies to each path, and then recombined. The dualelectrode machzehnder modulator demzm is an external electrooptic modulator that is widely used in radio over fiber rof systems to generate millimeterwaves mmwaves. This object modulates the input signal using the continuous phase modulation cpm method. This example shows the oqpsk modulator baseband block configured for multirate processing using integer or bit for the input type. Machzehnder interferometers are used in electrooptic modulators, electronic devices used in various fiberoptic communication applications. Someone can help me to have a code in matlab that perform this operation. Matlab simulink simulation platform for photonic transmission. Premade functions for microrings, bragg gratings, multimode interferometer, contradirectional.
Modeling of machzehnder and electroabsorption modulator. One modulation technique that lends itself well to digital processes is called iq modulation, where i is the inphase component of the waveform, and q represents the quadrature component. Effect of radiation on a machzehnder interferometer. The operation of a machzehnder interferometer is often used as an example in quantum mechanics because it shows a clear pathchoice problem. Study theoretically and numerically the machzehnder interferometer optical filter. If the phase modulation is exactly equal in each path but different in sign, the modulator is chirp free, this means the output is only intensity modulated without incidental phaseor frequency modulation. How to simulate dual drive mach zehnder modulator in matlab. We present a multifunction electronicphotonic integrated circuit epic design which exploits a new operation mode of a machzehnder modulator mzm. We demonstrate a monolithically integrated compact ito electrooptic modulator in silicon on insulator photonics based on a mach zehnder interferometer featuring a highperformance halfwave voltage and active device length product of v. Pdf development of a machzehnder modulator photonic local. The fizeau interferometer in the fizeau interferometer. Different from the conventional design, the two arms of the modulator are driven by timeshifted signals of tunable amplitude.
By varying the drive signals applied to the electrodes, i. I want to simulate dual drive mach zehnder modulator in matlab. In most media for communication, only a fixed range of frequencies is available for transmission. Here we describe the details of how a simple version of the interferometer works. We present a multifunction electronicphotonic integrated circuit epic design which exploits a new operation mode of a mach zehnder modulator mzm.
Beamlab is an awardwinning set of simulation tools for beam propagation through optical devices and waveguides in your familiar matlab environment no hassle with learning a new proprietary language or cad tools, and utmost flexibility in postprocessing and editing of any output data and graphs. The machzehnder interferometer is a simple highly configurable device used to demonstrate interference by division of amplitude. Its versatility comes from the fact that the two electrical inputs can be controlled independently to generate a number of different optical. A mach zehnder modulator is used for controlling the amplitude of an optical wave. Mach is the son, ludwig, of the man, ernst, who proposed machs principle and for whom a unit for the measurement of the speed of sound is named.
The modulator performance in various configurations are analyzed in this paper. The tx and lo lasers are not phase locked with each other c. Jun 30, 2010 frequency response of each machzehnder interferometer is also very important to achieve highspeed signals. Finally, basic bulk electrooptic modulators are described in the fourth section, modulator devices including some design considerations and performance criteria. Osa multifunction machzehnder modulator for pulse shaping. You can use this element in the rfbudget object and the circuit object. The device is named after physicists ludwig mach and ludwig zehnder. The proposed transmitter is able to generate three types of 16qam signals. In physics, the machzehnder interferometer is a device used to determine the relative phase shift variations between two collimated beams derived by splitting light from a single source. Mach zehnder modulator mzm set bias voltage at minimum transmission point v.
According to comsol, a multiphisics simulation software company, a mach zehnder modulator modulates the input signal by splitting it into two parallel branches, affecting the relative phase on one or both of the parallel branches, and recombining each branch at the output. The discussion presented in this chapter applies to any electrooptic material, any direction of the applied voltage, and any direction of the wave vector. We demonstrate data modulation at line rates up to 72 gbits bpsk and 108 gbits 4ask. This object has each specified property set to the specified value. Here you see the schematic of a mach zehnder modulator. Starting in r2016b, instead of using the step method to perform the operation defined by the system object, you can call the object with arguments, as if it were a function. Integrated machzehnder interferometerbased modulators. A pdf presentation presenting the librarys purpose and principles. Osa 108 gbits plasmonic machzehnder modulator with 70. Siliconorganic hybrid soh machzehnder modulators for. Machzehnder modulators are incorporated in monolithic integrated circuits and offer wellbehaved, highbandwidth electrooptic amplitude and phase responses over a multiplegigahertz frequency range. It is used for spectrally efficient multisymbol transmission based on differential quadrature phase shift keying dqpsk modulation. A recirculating delayed selfheterodyne method using a. A packaged silicon photonic traveling wave machzehnder modulator operating at 10 nm is presented and studied.