However, there is always a small difference between the. Voltagecontrolled integrated laser machzehnder modulator. Older versions% of matlab can copy and paste entirebloc. Dacx1416 optimized solution to modulator biasing in ratio. Electronic and computer engineering, university of limerick, limerick, ireland. In this thesis we present the study of the implementation of ultrashort pulses using frequency comb generation in a mach zehnder modulator and chirp compensation in a standard singlemode fiber. Performance analysis of rof link using machzehnder modulator. Analysis of machzehnder interferometer with one arm. Learn how it works and how to optimize its design using. The schematic diagram of mach zehnder mz modulator is shown in figure 2.
Optionally, passive rc filters can be used for limiting the bandwidth further after considering. Create a modulator object with a gain of 4 db and local oscillator lo frequency of 2 ghz. The schematic of a typical split upper and lower and dual electrode separate dc and rf configured machzehnder external modulator is shown in fig. Mach zehnder 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. How to simulate dual drive mach zehnder modulator in matlab. These userconfigurable systems integrate a mach zehnder intens. Use the modulator object to create a modulator element. Optimizing machzehnder modulator designs with comsol. It uses the mach zehnder interferometer principle in waveguides, enabling you to transmit signals with particularly high modulation frequencies up to the gigahertz range.
Overlop between the phase obtained with matlab and vpi pag. A machzehnder modulator is used to control the amplitude of an optical wave which is given to it. The device is based on machzehnder interferometer made by titanium diffusion in lithium niobate substrate. We achieved 50gbs operation of a ringresonatorbased silicon modulator for the first time. Beamprop beam propagation method software rsoft photonic. Thorlabs allinone digital reference transmitters are based on proven lithium niobate linbo3 modulator technology driven by highfidelity rf amplifiers. Schematic diagram of mach zehnder modulator the schematic of machdiagram zehnder mz modulator is shown in figure lithium niobate 2. The optical wave enters from the input side and then splits equally into two arms. Highspeed, fiberoptic, digital reference transmitters.
The incoming light is split into two branches, different phase shifts applies to each path, and then recombined. Beamprop is the industryleading design tool based on the beam propagation method bpm for the design and simulation of integrated and fiberoptic waveguide devices and circuits. Because of its relatively large and freely accessible working space and flexibility of location of the fringes, it is the. The machzehnder interferometer is a simple highly configurable device used to demonstrate interference by division of amplitude. This example demonstrates the simulation of a 3d machzehnder modulator mzm implemented on silicononinsulator, using synopsys sentaurus tcad and rsoft tools.
To understand how it works and how to optimize its design, you can use the comsol simulation software. The most popular modulator in optical communication systems is the lithium niobate linbo3 mach zehnder modulator mzm. Optsim circuit is a design automation tool for pic design. 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. The work outlined examines the performance of multiple bands of generalized. We offer modulators for wavelengths in the vis and ir spectral range for this purpose. The mach zehnder interferometer is a simple highly configurable device used to demonstrate interference by division of amplitude. The setup includes two cascaded mach zehnder modulators mzms, a sinusoidal wave oscillator, and an electrical time delay. The forwardbiased operation mode was applied, which exhibited a v. Communications systems, matlab simulink simulation, optical communications.
Complex phase biasing of silicon machzehnder interferometer. External modulators and mathematical modeling ofmach. The electrooptic effect is one of the most important phenomena in mach zehnder mzi interferometer structure. Maldonado department of electrical engineering the uni y ersity of texas at arlington arlington, texas 1 3. Here the thicknesses of the beamsplitters and the re. Apr 20, 2015 optisystem is a comprehensive software design suite that enables users to plan, test, and simulate optical links in the transmission layer of modern optical networks. Implementation of machzehnder modulation otdm system. The pindiode phase shifter, which consists of a sidewallgrating waveguide, was loaded into the ring resonator. Matlab simulink is one of the most userfriendly software platforms that can write. Vpiphotonics integrated laser machzehnder modulator. Premade functions for microrings, bragg gratings, multimode interferometer. It contains a library of useful elements flicker noise generator, mach zehnder modulator, etc.
I am trying to make a simulation model for receiver shot and thermal noise and monitering it. It is an ideal platform for modeling optical systems and photonic integrated circuits that operate with coupling and feedback of different optical and electrical signal paths. Performance analysis of machzehnder modulator using fuzzy. Iq or intensity mach zehnder supported modulation formats all, no dependency max. They are designed for highspeed fiber optic test and measurement applications. Two phase modulators can be placed in parallel using an interferometric structure. Description the 10 gbitss electrooptic modulator is designed for longwavelength, singlemode external amplitude modulation applications. Optical simulation of a machzehnder modulator beamlab. This property requires a scalar or vector with odd integer elements between modulationorder 1 and modulationorder 1. We present a multifunction electronicphotonic integrated circuit epic design which exploits a new operation mode of a mach zehnder modulator mzm. A machzehnder modulator bias controller based on oma and average power monitoring minhyeong kim, byungmin yu, student member, ieee, and wooyoung choi, member, ieee abstractwe demonstrate an integrated circuit ic implemented in 28nm cmos technology for machzehnder modulator mzm bias control. Access to the travelled distance physical or optical of any waveguide.
This study provides experimental and analytical results showing an enhancement up to 20 db in the 3rdorder intermodulation distortion factor at 5 ghz using rf and optical asymmetrical feeding factors. The schematic of a typical split upper and lower and dual electrode separate dc and rf configured mach zehnder external modulator is shown in fig. Implementation of machzehnder modulation otdm system ijert. It is strongly encouraged to get the free software klayout to look at your gds files. The first part of the chapter presents the vpi program, with its features.
Different from the conventional design, the two arms of the modulator are driven by timeshifted signals of tunable amplitude. The switching between the ports is achieved by an electrooptic effect within such structure. 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. Analysis of machzehnder interferometer with one arm loaded. A model of fuzzy logic inference system with mz modulator is developed using matlab 7. Optical frequency comb generation based on chirping of mach. The machzehnder interferometers mzis can be used to perform the optical switching based on the principle of electrooptic eo effect. Practical challenges for implementing this method with a silicon mach zehnder modulator are discussed, but the analysis is general to other material platforms. Specify the data symbols used by the modulator prior to the first call to the step method in reverse chronological order. Large signal analysis of machzehnder modulator intensity. The performance of a dual parallel differential mach zehnder modulator broadband linearization architecture is analysed. A machzehnder modulator is used for controlling the amplitude of an optical wave. The device contains two input ports and two output ports associated with electrodes. Matlab simulink simulation platform for photonic transmission.
Machzehnder interferometers are also used to study one of the most counterintuitive predictions of quantum mechanics, the phenomenon known as quantum entanglement. Javier romerovivas, aidan meehan and lukasz krzczanowicz optical communications research group, dept. Introduction to ixblue machzehnder modulators bias. This object modulates the input signal using the continuous phase modulation cpm method. The machzehnder modulator is a type of optical modulator used for communication applications.
Search mach zehnder modulator matlab code, 300 results found matlab code for digital voice processing and matlab simulation matlab code for digital voice processing and simulation of matlab source code download electronic publishing. Performance analysis of machzehnder modulator using. The jenoptik integrated optical amplitude modulator is a fibercoupled electrooptical light modulator. How would one model machzehnder modulator in simulink. A machzehnder modulator is an optical modulator used for communication systems. Lithium niobate mach zehnder modulators are suited for use in metro, longhaul lh and ultra longhaul ulh optical transport. Design of barker code generator in optical domain using mach. Barry abstracthighly linear integrated optical modulators are required in order to provide a distribution platform for analog radiooverfiber rof signals. The intensity modulators are designed to have equal arms and thus balanced optical paths. The mach zehnder interferometer structure working on the principle of electrooptic effect behaves as the powerful optical switching device. Jun 30, 2010 frequency response of each machzehnder interferometer is also very important to achieve highspeed signals. Can anyone suggest a free software for drawing optical schematics. 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.
Simulating mach zender modulator by optisystem haidarmuh. The mach zehnder interferometer is an important diagnostic tool. Connect the cw laser output port to the mach zehnder modulator input port. Such a modulator is called machzehnder intensity electrooptic modulator or simply machzehnder modulator mzm. An electrooptic switch is a device used in integrated fibre optics.
Electrooptic modulator august 1999 2 lucent technologies inc. Learn more about mach zehnder, matrix, interferometer matlab. Beamlab consists of two toolboxes, the beam propagation toolbox and mode solver toolbox. The paper contains the discussion of electrooptic effect based mzi structure. Integrated machzehnder interferometerbased modulators for. The advantages and applications of the machzehnder. The transfer function mach zehnder interferometer with one arm loaded with double micro ring resonator is. Diagram of a simple machzehnder interferometer, ignoring the thickness of the beamsplitters.
Modeling of machzehnder and electroabsorption modulator. The proposed techniques are simulated on the matlab software. Learn more about optical fiber, mach zehnder modulator, machmach zehnder modulator simulink. Apr 29, 2019 implementation of mach zehnder modulation otdm system written by karthik s, d dhanush, harish s v published on 20190429 download full article with reference data and citations. I want to simulate dual drive mach zehnder modulator in matlab. External modulators and mathematical modeling ofmach zehnder. 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.
It is most frequently used in the fields of plasma physics, aerodynamics, and heat transfer to measure density, pressure, and temperature changes in gases. This object has each specified property set to the specified value. With beamlab you can solve a wide range of different beam propagation and waveguide analysis problems. Design of barker code generator in optical domain using machzehnder interferometer 677 let us say, if the voltage difference between these two electrodes is and is the separation between the electrode, the electric field will be approximately. Connect the nrz pulse generator output port to the available mach zehnder modulator input port. The first mzm is driven directly by a sinusoidal wave, while the second mzm is driven by a delayed replica of the sinusoidal wave. You can use this element in the rfbudget object and the circuit object.
Solving mach zehnder interferometer using matrix matlab. The device is named after physicists ludwig mach and ludwig zehnder. I used dual drive mach zehnder modulator component to make a constant magnitude for all comb lines. The software has been commercially available since 1994, and is in use by leading researchers and development engineers in both university and industrial. Wavelength tunable short pulses sources based on frequency. Mach zehnder interferometer modulator vt electrode a b in c out d. A new approach for the generation of an optical frequency comb, based on chirping of modulators, is proposed and numerically demonstrated.
In beamlabs demos directory you can find these and additional examples. Optical frequency comb generation based on chirping of. Someone can help me to have a code in matlab that perform this operation. Dacx1416 delivers optimized solution to mach zehnder modulator biasing in both ratio and dithertype circuits 6 oifdpcrx01. Create another modulator object that is an upconverter and has an output thirdorder intercept oip3 of dbm. The output is a result of interference, ranging from. Modulation of 87 gbaud was demonstrated with a dualparallel machzehnder modulator. The analysis is carried out by simulating the proposed device with matlab.
It contains a library of useful elements flicker noise generator, machzehnder modulator, etc. Such a modulator is called mach zehnder intensity electrooptic modulator or simply mach zehnder modulator mzm. Silicon mach zehnder modulator colm browning, alexander gazman, nathan abrams, keren bergman, and liam p. A mach zehnder modulator is used to control the amplitude of an optical wave which is given to it. Our dedicated photonic device, circuit, system and layout software suites serve as an integrated framework for developing a wide range of photonic applications, including novel photonic devices, photonic integrated circuits, and. The input waveguide is split up into two waveguide interferometer arms. Optisystem allows you to visualize simulation results in a number of ways.
Implementation of sequential logic circuits using the mach. When the two arms are recombined, the phase difference between the two waves is. Apr 08, 2014 the mach zehnder modulator is a type of optical modulator used for communication applications. Machzehnder modulator mzm set bias voltage at minimum transmission point v bias v. This electrode configuration allows for separate control of both dc and rf modulating signals, as well as separate electrooptic control of both upper and lower arms of the mzm. A mach zehnder modulator is used for controlling the amplitude of an optical wave. Researchers developed and demonstrated for the first time a siliconbased electrooptical modulator that is smaller, as fast as and more efficient than stateoftheart technologies.
Challenge the mzm involves electronic, process, and optical physics. 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. Electrooptic machzehnder interferometer based optical digital. A b source of photons 50% reflector 100% reflector figure 2. Cpmmodulatorname,value creates a cpm modulator object, h. This is matlab simulink software written by michael fleyer. Mach zehnder modulators are suited for use in metro, longhaul lh and ultra longhaul ulh optical transport applications 34. On the performance of a linearized dual parallel mach. Design of barker code generator in optical domain using. Modeling of mach zehnder and electroabsorption modulator pulse generators and extraction of the chirp factor michael j. Machzehnder modulator modulated radiooverfiber transmission system using dual.
Osa multifunction machzehnder modulator for pulse shaping. In addition to amplitude modulation, a phase skip of. Thus i needed to model a mach zehnder modulator for modulating data on carrier laser for transmission purpose. Optimizing machzehnder modulator designs with comsol software. A highspeed silicon optical modulator based on a metal. However, the suitability of the techniques is verified using the highly reliable optibpm. The driving voltage and optical insertion loss at 50gbs were 1. The modulator controls the amplitude of an optical wave as it passes through the device. I need to convert a gfdm signal into optical signal with mach zehnder modulator.
The proper feedback mechanism with the delay unit provides the. Two possible configurations have been developed and optimized to obtain a picosecond pulse train. 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. We can enhance the bandwidth of the response by using thin substrate. The integration of laser source and mach zehnder mz modulator offers benefits arising from cost effective packaging and wavelengthindependent behavior making it an ideal transmitter concept for wdm systems. To date, the fastest siliconwaveguidebased optical modulator that has been demonstrated experimentally has a modulation frequency of only. Performance analysis of rof link using machzehnder. More sophisticated version of the machzehnder interferometer diagram. If a voltage is applied across one of the arms, a phase shift is induced for the wave passing through that arm. Mathworks is the leading developer of mathematical computing software for engineers and scientists. The channel waveguide can be created on the lithiumniobate substrate. Implementation of machzehnder modulation otdm system written by karthik s, d dhanush, harish s v published on 20190429 download full article with reference data and citations.