16 qam optical modulator driver

We successfully demonstrate 400 gbits transmission at 1577 nm over an unamplified 40 km standard singlemode fiber ssmf link with 11db loss target. Dual hd or sd channels in compact encoder modulator form factor supports both mpeg2 or h. Recent advances in ultrahighbandwidth coherent driver. In the united states, 64 qam and 256 qam are the mandated modulation schemes for digital cable see qam tuner as standardised by the scte in the standard ansiscte 07 20. Which optical modulation scheme best fits my application.

A powerful ts remultiplexer matrix rebuilds up to 16 new ts streams for further qam modulation. We fabricated a highspeed quadparallel machzehnder linbo3 modulator. We report a coherent driver modulator subassembly for 100gbaud class transmitter. Semiconductor optical amplifiers for 64gbaud 1664qam. Whats the difference between pam and qam in optical fiber. The millimeterwave is obtained with optical frequency multiplication ofm. Osa qpsk modulation in the oband using a single dual. Scrambling qam atsc modulator for ip edge qam applications. This cdm joins neophotonics 64 gbaud coherent intradyne receiver icr and ultranarrow linewidth tunable laser to enable single channel 600g data transmission over data centre interconnect dci distances of approximately 80 km using 64 qam. Unlike traditional 16 qam optical modulator with two machzehnder modulators mzms driven by two fourlevel electrical signals, the device is based on four mzms driven by four binary electrical. Superchannels until recently, channels were always found on specifi c wavelengths, defi ned by itu grids 50 ghz spacings or 100 ghz spacings.

Silicon 16qam optical modulator driven by four binary electrical signals jianfeng ding, sizhu shao, lei zhang, xin fu, and lin yang. Recent advances in ultrahighbandwidth coherent driver modulator. Osa qpsk modulation in the oband using a single dualdrive. It receives up to 160 digital tv transport streams from gigabit ethernet and 4 asi streams from 4 asi ports. Clariphy boasts 64qam modulation breakthrough light reading. This style of modulator has been used for advanced telecommunication modulation schemes for example, 16 qam. The project file the project file qam transmitter and receiver. Whats the difference between pam and qam in optical fiber links. The gx66471 will support 16 and 64 qam, addressing the needs of both 400g and 600g systems. Pdm mary quadrature amplitude modulation m qam is actively investigated for use in nextgeneration longhaul terrestrial optical communications systems 12. The h301 optical modulator driver provides a highquality, singleended voltage to drive an external laser modulator. Each module supports up to 256 individual spts or 8 mpts ip transport streams and 8 outputs. Pdf silicon 16qam optical modulator driven by four.

Implementation and investigation of a realtime optical 16qam. The maom003108 is a high performance dual channel mz modulator driver ic for 100400g dpqpskdpqam 32gbps x 4 applications. These components also support 400g over metro distances of 400600 km using 64 gbaud and 16 qam or 200g over longhaul distances of greater than km using 64 gbaud and qpsk. Introduction the qam modulation is typically used in catv system for cable modem transmission. Quadrature amplitude modulation qam qam transmitter and. Optical communications qam modulator ring resonator optoelectronics abstract we propose and fully analyze a compact structure for dacfree pure optical qam modulation.

This ic is available in a small 10 mm x 10 mm smd package. This includes drivers for high performance machzehnder modulators, externally modulated lasers eml and directly modulated lasers dml. Coherent optical fiber communications for data rates of 100gbits and beyond have recently been studied extensively primarily because high sensitivity of coherent receivers could extend the transmission distance. This response is sufficient for 100gbaudclass operation even if we. As will be discussed later, a single tia operating at 28 gbaud consumes only 155 mw, a substantial improvement over previous demonstrations of integrated coherent receivers icr 7, fig. Comparison of qam modulation types gigabit wireless. Us10243664b2 optical modulator driver circuit and optical. Coherent modulation up to 100 gbd 16qam using siliconorganic hybrid soh. Note that many marketing people will refer to these as qam 64 and qam 256. Centellax has released the oa3mmqm, a lowcost lithium niobate linbo 3 quadinput 32gbaud linear modulator driver amplifier for dualpolarization 16 qam dp16qam applications. It generates optical qpsk16qam signals in a serialparallel structure of machzehnder modulators mzms. Commercially available highbandwidth coherent driver modulator hbcdm and highbandwidth micro integrated coherent receiver hb. Waveguide modulators optical communications qam modulator ring resonator optoelectronics abstract we propose and fully analyze a compact structure for dacfree pure optical qam modulation.

Neophotonics has announced general availability and volume production of its 64 gbaud high bandwidth coherent driver modulator hbcdm. Quadrature amplitude modulation qam using binarydriven. Centellax intros 32g modulator driver for 400g qam. This modulation format is intended for either single carrier or multicarrier systems using orthogonal frequency division multiplexing ofdm, in. Quadrature amplitude modulation qam is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information. Digital qam modulators application notes for the i and 3 bits for the q. In 32 qam then, there are five amplitudes versus three in.

The platform is the first of its kind to enable 64 qam modulation. Encrypted or clear qam rf frequencies in two groups of 4 adjacent channels. Dual polarization iqqam transmitter evaluation board, pmqpsk. Microscope image of the fabricated silicon 16 qam optical modulator. This was the case for analog modulation, but if we talk about qam with digital modulation, then, at the place of analog message signal, we use digital messages. Pdf silicon 16qam optical modulator driven by four binary. Jianfeng ding, sizhu shao, lei zhang, xin fu, and lin yang. These components also support 400g over metro distances of 400600 km using 64 gbaud and 16 qam or 200g over long. The maom003108 takes a differential input signal that can range from 100mvpp to 300mvpp each port to provide a single ended output that can range up to 6vpp. An optical modulator driver circuit 1 includes an amplifier 50, q10, q11, r10r, and a current amount adjustment circuit 51 capable of adjusting a current amount of the amplifier 50 in accordance with a desired operation mode. The optical digitaltoanalogue conversion technique that employs an optical iq modulator and a dualpolarization quadraturephaseshiftkeying dpqpsk modulator is applicable to binary psk, qpsk.

Performance of pm qpsk and pm 16qam coherent optical. Silicon 16qam optical modulator driven by four binary. The maom003108 takes a differential input signal that. Once we obtain the transfer function, it is then used to preequalize the 4level signal. Modulator drivers analog devices optical modulator driver portfolio features operation over 32 gbps, low dc power dissipation, integrated peakdetect functionality, and lower additive rms jitter. Convert up to ip video streams to hdtv digital television. The symbols are zero padded to generate a data stream at the desired sample rate for the final digital to. The subassembly employs a codesigned highspeed driver ic and optical modulator, where the designs for the characteristic impedance between the driver ic and iq modulator and for the rf pads are optimized. Software drivers are available for the sun solaris, windows, freebsd, and linux operating systems.

The maxlinear mxl9244 driver was designed for 200 and 400 gbps coherent optical networks and supports linear dpqpsk, dp 16 qam and dp32 qam transceiver designs, where component linearity and bandwidth are critical for optimal optical signaltonoise ratio osnr. Performance of coherent optical square16qamsystems based. The fourlevel drive signals can be generated using either the rf. These 16 qam carriers are directly independently upconverted with high speed dac. The qn16e is based on an underlying architecture that can provide up to 128 qam channels on a single pcie card. Demonstration of an loless, dspfree qpsk receiver for. The inp mzm module has a dual iq modulator chip, which. Note that we use a 16qam electrical signal to drive a qpsk transceiver system, to visualize the symbol mapping, we can either use the build in 16qam symbol map table in vsa or, by setting the load map from file to be true, we can. Triquint expands industrys largest smt optical modulator.

The qorvo tga4899sl is a quad channel optical differential input, single ended output modulator linear driver amplifier designed for 100 400 gbs optical markets. The single drive pushpull silicon mzm demonstrated in 8. The qn16e pci express quadrature amplitude modulator qam host bus adapter hba is the newest member of the companys torrent family of high performance, low cost per stream mpeg qam transmission devices. Osa silicon 16qam optical modulator driven by four. But here, we are only talking about qam as a digital modulation. Direct connection to satellite or cable receivers redistribute highquality content onpremise or campuswide. A novel scheme of optical modulation in 40 ghz radioover fiber rof system is proposed. Level generator and modulator driver for the generation of electrical driving signals for optical. Each of the adddrop mziarm consists of the 2segment rf phase shifters. Experimental demonstration of 16 qam transmission with a single dualdrive machzehnder modulator. The obtained 16 qam constellation exhibits that this driver module can make 100gbits or beyond 100gbits systems. Can anyone please help me out, what components should i use to connect optical fiber between them. User selectable 16qam, 32qam, 64qam, 128qam, and 256qam modes. The videopropulsion qn16e provides up to 16 qam channel outputs on a single fconnector.

Quadrature means that two carrier waves are being used, one sine wave and one cosine wave. Neophotonics announces general availability volume production of high bandwidth coherent driver modulator hbcdm cloud and data center services. This configuration generates optical 16qam signals in a quadparallel structure of machzehnder modulators mzms producing the 60 ghz mmwave after passing through the bandpass filter centered on this frequency. Multicarrier analog modulation using silicon based optical modulators has previously been demonstrated in 7 and 8. Neophotonics announces availability of 64gbaud high.

Qam modulators for digital headend applications, including. Apr 25, 20 in this video, i will explain what is qam modulation and what is 16qam. Silicon 16qam optical modulator driven by four binary electrical signals. Qam is both an analog and a digital modulation method. Maxlinear announces drivers and tia for optical networks.

If you wish to control the intensity and phase independently using our parts, you will have to cascade two different intensity and phase modulators. Coherent modulation up to 100 gbd 16qam using silicon organic. Our products support communication infrastructure 400 g 16 qam, 100 g dpqpsk, broadband gain stage and preamplifiers, broadband test and. Neophotonics announces general availability and volume. Unlike traditional 16qam optical modulator with two machzehnder modulators mzms driven by two fourlevel electrical signals, the device is based on four. These components work together to enable users to implement singlechannel 600g or dualchannel 1. Typical applications include driving eml, eam, and machzehnder style modulators. Use the two electrical signals to drive the mzm for modulation, connect the circuit as shown following. We propose a novel 16quadrature amplitude modulation qam transmitter based on two cascaded iq modulators driven by four separate bi nary electrical signals. In3214hg 32 gbps quad machzehnder modulator driver applications 100g coherent systems bpsk and qpsk machzehnder modulator driver features data rate up to 32. Neophotonics hbcdm is implemented in a small form factor 25 x 12 x 5 mm package which copackages a linear, quadchannel, differential 64 gbaud driver with an indium. A variety of forms of qam are available and some of the more common forms include 16, 32, 64, 128 and 256 qam.

Furthermore, modulation on opticalwave is transferred onto millimeterwave. The modulator consists of an adddrop mziarm in iarm and another adddrop mziarm cascaded with a thermal tuner phase shifter targeted for. In this paper, we present the results of optical 16 qam modulation with this compact quadchannel driver module and the inp mzm module, which was also reported 4, 5. Optical qpsk16qam modulation based on serialparallel mzm. Gray coded square16qam constellation diagram, right. Home forums system qam transmitter and receiver qam transmitter and receiver sasha joined february 2015 participant hi all, i am trying to connect the optical fiber between qam modulator and demodulator. Gigpeak announces 64 gbd smt quad linear modulator driver. The constellation of 16 qam signal detected at the point after bpf and the baseband 16 qam signals eye diagram is also shown in fig. It integrates high bandwidth pmqpsk modulator and high speed rf drivers. Keeping up with bandwidth requirements in next generation short and longreach optical communication systems will require migrating from simple modulation formats such as onoff keying to more advanced formats such as quaternary phaseshift keying qpsk. The suite consists of three critical optical components.

Nov 22, 2016 qam, quadrature amplitude modulation is widely used in many digital data radio communications and data communications applications. It conveys two analog message signals, or two digital bit streams, by changing modulating the amplitudes of two carrier waves, using the amplitudeshift keying ask digital modulation. Qpsk modulation in the oband using a single dualdrive mach. The optical modulator driver 100 is a travelling wave amplifier twa. The in3214hg provides smt differential inputs and gppo outputs. Moreover, different operation points of a 16qam modulator were tested. Sep 24, 20 triquint expands industrys largest smt optical modulator driver portfolio with new 100200 gbs solutions see triquint at ecoc, the largest european optical communications event. Linbo3 iqqam dualdrive machzehnder modulator with modulation speed of up to 22. Microsemi is developing a new generation of surface mount drivers that provide industry leading signal to. Icr, designed for cband are used in combination with two tocan packaged and thermally tuned low. Pdf 40gbaud 16qam transmitter using tandem iq modulators.

The current amount adjustment circuit 51 includes at least two current sources is10 that are individually onoffcontrollable in accordance with a binary. Macom has a large portfolio of optical modulator drivers for applications covering distances of hundreds of meters up to thousands of kilometers at data rates from 1 gbps up to 100 gbps and beyond. The tga4899sl consists of four channels of high performance wideband amplifiers and integrated broadband rf chokes assembled in a 9 x 14 mm package, requiring a minimum of offchip. Implementation of higher order modulation beyond 16qam, in optical fiber. Dacless amplifierless generation and transmission of qam. The spectrum of 16 qam modulated signal at 60 ghz is shown in fig. For pm qpsk, twolevel drive signals are required for the iq optical modulator, while for pm 16 qam, fourlevel drive signals are required. The proposed qam16 modulator schematic is shown in fig. Abstractadaptive digital modulation in the optical domain is performed using an integrated optical modulator with a high symbol rate of 10 gbaud. The preequalized 4level signal is then used to drive the iq modulator, for the optical 16qam modulation.

The millimeterwave is obtained with optical frequency multiplication. A 256 qam signal uses 8 input bits per symbol and selects between 16 values of i and 16 values of q. In our experiments, we use an soh iq modulator with a. The differential amplifier amp1 corresponds to each of cells cell1 to cell4 illustrated in figs. Centellax unveils quadinput 32gbaud linear modulator driver. Flexgrid defi nes a new grid, where each channel width is a multiple of 12. The paper is entitled characterizations of semiconductor optical amplifiers for 64gbaud 1664qam coherent optical transceivers, we demonstrated semiconductor optical amplifiers soas capable of operating at 64gbaud for 16 and 64 qam modulation with large dynamic ranges. Lithium niobate electrooptic modulators, fibercoupled. Yokoyama, low driving voltage machzehnder interference modulator. Coherent modulation up to 100 gbd 16qam using silicon. Triquint expands industrys largest smt optical modulator driver portfolio with new 100200 gbs solutions see triquint at ecoc, the largest european optical communications event.

Jul 28, 2015 qam stands for quadrature amplitude modulation, meaning that it is a two dimensional modulation format, with one dimension in quadrature with the other i. Qorvos tga4899sl is a quad channel optical differential input, single ended output modulator linear driver amplifier designed for 100400 gbs optical markets. Torrent qn16e pcie 16128 channel qam modulator videopropulsion. Neophotonics makes available matched suite of 64gbaud.

It has a differential input and singleend output, with a 4. Our products support communication infrastructure 400 g 16 qam, 100 g dpqpsk, broadband gain stage and preamplifiers, broadband test and measurement equipment, and other applications. Linbo3 iq qam dualdrive machzehnder modulator with modulation speed of up to 22. Comparing the constellation diagrams of 16 qam and 16 apsk in figure 9, in 16 qam there are three amplitudes whereas 16 apsk has only two. Iptv to encrypted 8, 16 or 24 rf qam atsc modulator. In this paper, we report the first demonstration of qpsk signal generation in the oband using a silicon dualdrive machzehnder. So you can observe here that, quadrature amplitude modulation qam is the combination of both amplitude modulation and phase modulation as phase change of carrier wave takes place here.