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. To obtain the frequency dependence of the optical response of the mzi modulator at a constant drive. Benchtop highspeed linbo 3 electrooptic modulator drivers. A highspeed silicon optical modulator based on a metaloxidesemiconductor capacitor. An electrooptic modulator eom is an optical device in which a signalcontrolled element exhibiting an electrooptic effect is used to modulate a beam of light. Specially designed driver circuitry is incorporated which allows flexible operation of the h400 series devices in either rf phase modulation mode or in conventional rf pulse onoff am modulation mode. Osa monolithic integration of ingaasp mzi modulator and.
We demonstrated the monolithic integration of a carrierinjection ingaasp machzehnder interferometer mzi optical modulator and ingaas metaloxidesemiconductor field. The max3942 is designed to drive highspeed optical modulators at data rates up to 10. Microsemi offers optical modulator driver amplifiers for 100g 200g optical transceivers used in longhaul, metro, and data center applications. Thorlabs selection of electrooptic eo modulators includes freespace and fibercoupled linbo3 modulators.
It functions as a modulation circuit, with an integrated control op amp externally programmed by a dc voltage. The allfiber mzi structure for optical dpsk demodulation. High speed nrz and pam optical modulation using cmos photonics. Post layout simulation results show that for 5 gbs data rate, the driver consumes 308 mw from a 4 v power supply, which is significantly less power consumption compared to previously reported mzi modulator drivers. Electrooptic modulator selection guide new focus offers a broad line of electrooptic modulators and drivers that are versatile, reliable and easy to use. Fujitsu single drive dqpsk 40gbps ln external mz modulator. The optilab dual quadrature phase shift keying dqpsk modulator design is based on a dual parallel structure of two machzehnder modulators embedded in a machzehnder superstructure. Highspeed modulator drivers with an operational wavelength range of 1250 nm to 1610 nm, each modulator driver provides control for an external fibercoupled linbo 3 eo modulator. Machzehnder modulator for dqpsk transmission format wide eo bandwidth equivalent to conventional 40g modulator for each mzi s low. The input light is first affected by each mzi s modulating rf drive voltages, and then by each mzi s dc bias voltages, as shown by the translucent regions. Modulation bandwidths extending into the gigahertz range are possible with the use of lasercontrolled modulators. The incident light is te polarized, meaning that the optical.
Each internal modulator is designed to support 12 gbs signals. Optical modulator using mxene ti 3 c 2 t x t f, o, or oh deposited microfiber. It integrates high bandwidth optical modulator capable of dealing with data rate up to 40gbps. Our worldclass optical modulator drivers lead the industry by offering the lowest power consumption, higher linearity and convenience of surfacemount technology smt assembly.
The optical mzm machzehnder modulator transmitter is a high performance modulation evaluation unit that allows user to produce optical signals with complex modulation schemes nrz, ook, bpsk, dpsk. Each modulator driver includes an rf amplifier with amplitude and eyecrossing controls and. Ieee journal on selected topics in quantum electronics. The allfiber mzi structure for optical dpsk demodulation and optical psbt encoding guillaume ducournau, olivier latry and mohamed ketata. Qorvos optical modulator drivers are designed for 100, 200 and 400 gbs linear modulator functions for optical networks. Optical iq modulators for coherent 100g and beyond lightwave. A tutorial introduction to optical modulation techniques. In stateoftheart 50gbs nrz optical link based on machzehnder modulator mzm, the driver and laser together consume more than 10pjb. Cfpdco specifications allow 24w maximum power dissipation for a class 3 module, while for cfp2aco, only 12 w is allocated for a class 2 module. The integrated mzi modulator plus driver yields a 1012 ber with a 2231 prbs at 10gbs. They are available from 780 nm to 2500 nm and feature an electrooptical bandwidth of up to 70 ghz with low insertion loss, low vp, and also very high optical extinction ratio. The transmitter converts high speed electrical input data into an optical signal with the help of a driver amplifier and an optical modulator mzi. If a voltage is applied across one of the arms, a phase shift is induced for the wave passing through that arm. The mzi type eam mzea modulates light intensity by both optical absorption and interferometric extinction.
The mz modulator driver is typically designed to use both 50. Photonic crystal slow light machzehnder interferometer. In, a monolithic integration of the driver and optical pam4 modulator in bicmos process was presented running at 50 gb s. Mzi modulator structure for a 4bit optical dac, which is a. A 5 vpp differential output swing mzi driver amplifier in. Iiivoi wafer and b 3d schematic of carrierinjection ingaasp mzi optical modulator monolithically integrated with ingaas driver mosfet.
Integrated lithium niobate electrooptic modulators. To address this issue, this paper demonstrates a driver amplifier for the mzi modulator with a 5 vpp differential swing in 65nm cmos. Optilab features a large online catalogue of optical modulators and voas including intensity, phase, and polarization modulators, modulator. Quadrature amplitude modulation qam using binarydriven. Mzi driver l1 4x28g electrical input optical output mzi phase fifo delay phase fifo delay phase fifo delay phase fifo cw laser. Electronicphotonic codesign of silicon photonic interconnects. Plasmonic iq modulators with attojoule per bit electrical. Study of pam modulation for 100ge over a single laser. The integration of passive waveguides, optical ampliers and rf phase shifters for use in a lasermodulator device requires optimization of the following issues. This includes drivers for high performance machzehnder modulators, externally modulated lasers eml and directly. Lithium niobate electrooptic modulators, fibercoupled. Osa 50gbs silicon optical modulator with traveling. This operational diagram of an iq modulator shows the waveguides blue lines split into four paths embedded in the surface of the lithium niobate green.
These drivers offer excellent performance in compact surfacemount packages and include features such as gain control and peak detection, as well as the capability to be used in either linear or. Ingaasp machzehnder interferometer optical modulator. We describe a silicon photonic optical modulator based on a moscapacitor and a low power 1v cmos inverterbased driver ic. Figure 52 is an example of an mz modulator driver, which consists of a threestage predriver and cascode differential output driver 99.
Takenaka, monolithic integration of ingaasp mzi modulator and ingaas driver mosfet using iiiv cmos photonics, in optical fiber communication conference, osa technical digest online optical society of america, 2017, paper w3e. Silicon photonic modulators for pam transmissions iopscience. Performance of a similar mzi based device was comparable in terms of driving signals and response times, but requires about three times more power to achieve the same modulation depth. Another example that also needs multilevel driver signal is cascading an mzi. Driverless sub 1 v pp pperation of a plasmonicorganic hybrid modulator at 100 gbd nrz. Rp photonics encyclopedia electrooptic modulators, eom.
This tutorial only begins to discuss optical modulators. The modulation may be imposed on the phase, frequency, amplitude, or polarization of the beam. Model use with center frequency output power rfa141 12024 series 40mhz 30. Silicon carrier depletion modulator with 10gbits driver realized in. An important figure of merit for mzi modulators is the halfwave voltage v. Abstractmach zehnder interferometric mzi modulator based optical communication systems are finding increased research interests. Ingaasp machzehnder interferometer optical modulator monolithically integrated with ingaas driver mosfet on a iiiv cmos photonics platform. The phase shifter is composed by a 4 mmlong reversebiased pn junction with a modulation efficiency v.
Microsemi is developing a new generation of surface mount drivers that provide industry leading signal to. For a device with 20mmlong microwave strip line electrodes, we measure a low v. Machzehnder modulators are incorporated in monolithic integrated circuits and offer wellbehaved, highbandwidth electro optic amplitude and phase responses over a multiplegigahertz frequency range. The polarization of the input beam often has to be aligned with one of the optical axes of the crystal, so that the polarization state is not changed. Integrated optical modulator for adaptive digital modulation and analogue applications atsushi kanno, isao morohashi, takahide sakamoto, tetsuya kawanishi. Optical fiber communications conference, san diego, ca, usa, m2i. This mzi converts an optical dpsk to an intensitymodulated im signal. The design of an mzi modulator is governed by two key properties. The input waveguide is split up into two waveguide interferometer arms. Integrated mzi devices are used extensively in optical modulators and switches 10, 11. Machzehnder interferometers are used in electro optic modulators, electronic devices used in various fiber optic communication applications. Rp photonics encyclopedia acoustooptic modulators, aom. Silicon photonic modulator based on a moscapacitor and a.
Fibercoupled intensity, phase, or iq modulators for speeds up to 40 ghz can be driven by our eo modulator drivers. We also offer liquid crystal eo modulators for speeds up to 2. The driver accepts two independent digital and analogue modulating signals and provides a doublesideband amplitude modulated rf output to the acoustooptic modulator. Low driving voltage operation of mzitype ea modulator. The mzi consists of two arms, and operates on the principle. Low driving voltage operation of mzi type ea modulator integrated with dfb laser using optical absorption and interferometric extinction. Optical modulators based on the external modulationprinciples include a machzehnder interferometric opticalmodulator mz, or mzi.
In an mzi configuration, this efficient modulator and driver ic combination can produce a 9db extinction ratio at 28 gbps, at a wavelength of 10nm. Freespace amplitude, phase, or resonant modulators can operate at speeds up to 100 mhz. A figure of meritbased electrooptic mach zehnder modulator link. Figure 1 is a block diagram of such an optical modulator,which can be further integrated with a detector onto a microprocessor or other device, as onchip optical interface. This includes drivers for high performance machzehnder modulators, externally modulated lasers eml and directly modulated lasers dml.
We demonstrate silicon machzehnder interferometer mzi optical modulator with 50. An acoustooptic modulator aom is a device which can be used for controlling the power of a laser beam with an electrical drive signal. A machzehnder modulator is used for controlling the amplitude of an optical wave. Mzm optical transmitter, multiformat, nrzookrzbpsk. Higher voltageswing and faster transistors available in bicmos pave the way for demonstration of bicmos driver and sip modulator codesign for pamm modulation format 92, 99. Schematic diagrams of the mzi silicon optical modulator. The model h401d acoustooptic rf driver is designed to complement the h400 series rf phase modulation capable ao device family. High speed silicon machzehnder modulator highspeed circuits. A summary of the driver specification is shown in the following table. All of our optical modulators are based on the electrooptic or pockels effectthe linear dependence of the index of refraction on an applied electric field. A highspeed silicon optical modulator based on a metal. Hence a highly accurate model for microwave and optical propagation in an electrooptic modulator is needed that includes the loss in the modulating electrodes and in the inhomogeneous semicon.
Ingaasp machzehnder interferometer mzi optical modulator and ingaas. Basic modulator alignment instruction manual 830c series analog modulation key to model types. The simplest type of electrooptic modulator is a phase modulator containing only a pockels cell, where an electric field applied to the crystal via electrodes changes the phase delay of a laser beam sent through the crystal. Fujitsu dwdm 40gbs dqpsk ln single drive 15301610nm optical modulator ftm7961ex. As a result, it improves the extinction ratio er of a conventional eam, which allows us to reduce the modulation voltage v m, and thus reduce the power consumption of the driver circuit.
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