Emcore vcsel array driver

A special focus is on their applications for future shortreach optical interconnects, for example, in highperformance computers hpc. In some cases the modulation and bias current required for a vcsel may be lower than the specified minimums that the driver can deliver. Avagos industryleading 25g vcsel shipment surpasses 1. These controllers are designed to supply the low drive current typical for a vcsel. Vscel drivers and receiver arrays gigoptixs low power vcsel driver and receiver portfolio of 4channel and 12channel devices provides customers with high performance, high data rates, low power and low emissions solution for the datacenter and consumer space. The 8bit dac is scaled from the design for the 5 gbs vcsel array driver asic fabricated in a nm cmos process.

Additionally, vcsels are suitable for 1 and 2dimensional array integration. Often vcsels are coupled with passive optics or scanning optics which generate very wide beams. Feb 10, 2011 in this paper, we summarize the recent vcsel development effort at emcore. The top level schematics contain eight subcircuit block representing each more info. Mar 14, 2005 as part of the oe17 group discussions at photonics west 2005, this paper will address the following topics. The vldc002 and vitc002 are compact and easy to use laser current controllers for vcsel diodes vertical cavity surface emitting laser. Unlike edge emitting laser diodes, vcsels emit upwards and thus can be easily packaged as emitter arrays containing hundreds of emitters on a single chip. Oem vcsel driver with temperature controller, to46 and to5 socket on board. Selfmixing imaging sensor using a monolithic vcsel array with. Currentmode drivers are often used due to the lasers linear. Eye diagram from a simulation of the extracted layout of the driver circuit, including parasitic capacitance and inductance.

A 4ch 10gbs cmos vcsel driver array with adaptive optical. In this talk, we present emcores recent effort to optimize the 850nm 10g vcsel array for the real world laser drivers used in parallel transceivers and active. Optimizing 10gbps vcsel for realworld laser driver in parallel optical transceiver authors. The max3735a, for example, has a minimum modulation current of 10ma.

Either an onchip or offchip fuse used in series or in parallel with the vcsel that provides a visual indicator that the device has been subjected to an esd or eos event. The wavelength of 980 nm has fundamental advantages for these applications and plays a significant role in vcsel research today. These factors make vcsel test and measurement a challenging task. New high speed vcsel product development at emcore, in proceedings of the spie. Compact vcselbased laser array communications systems for improved. An integrated photodetector means for controlling the output of a light source, where the control means is a photodetector formed on a silicononinsulator substrate, the integrated photodetector senses the optical power from the light source and provides an electrical feedback signal which can be used to adjust the dc bias levels of the light source control driver circuit. We present the result of the 5 gbs vcsel array driver. In this talk, we present emcore s recent effort to optimize the 850nm 10g vcsel array for. Multiplexing fir output driver 25 4tap fir filter implemented in driver to compensate for vcsel frequency response s. Vcsel array driver asic with the adjustable activeshunt peaking technique and the novel balanced output structure under the silicononsapphire sos. In most cases, this is the only way to achieve good transceiver performance for a given vcsel driver ic.

Flip chip vcsel arrays on transparent substrates, proceedings. We will also present the work on manufacturing both singlet and various vcsel arrays, with performance up to 10gbps, using a universal mask set to deliver both high performance and high manufacturability. The improved efficiency requires less modulation and bias current from the laser driver. The hfe4080321 is a highperformance 850 nm vcsel vertical cavity surfaceemitting laser packaged for highspeed data communications.

Emcore introduces 40 and 100 gbps cfp optical transceiver. Flir offers highpower vcsel arrays producing up to 5w of continuous wave output power in an easytomount vertical pin package. Section ii describes the design details of the proposed vcsel driver. Emcore will open a 67,000squarefoot manufacturing plant next month at the sandia science and technology park to further develop and produce the product. Gadallah we report on fabrication and characterization of densely packed topemitting 16. Coupled 2dimensional 2d arrays of vertical cavity surface emitting lasers vcsels have been pursued for more than two decades 14. Bossert et al, production of highspeed oxide confined vcsel arrays for datacom. Special topics in optical interconnects circuits and. Proposed vcsel driver with adaptive optical power control in this paper, a channel 140gbs vcsel driver array with adaptive optical power control is designed and implemented in 0. Gigoptixs vcsel drivers and tia arrays enable chip to chip, boardtoboard. In this talk, we present emcore s recent effort to optimize the 850nm 10g vcsel array for the real world laser drivers used in parallel transceivers and active cables.

Vertical cavity surface emitting lasers vcsels nasa nepp. The vcsel has a circular low divergence beam that can be efficiently coupled into a 50125 or 62. The hxt8204 vcsel driver array is a key component for compact, robust, lowpower optical transmitter modules. In conjunction with the vcsel array, the chip handles the complete digitaltooptical conversion, including cml input, laser driver, drive control, and supervision. Technology choices for optical interconnects vcsels or.

Progress on highspeed 980 nm vcsels for shortreach optical. Figure 5 shows the averaged raw signal of pulses, each with. The device can also be arranged in linear 1x4, 1x8, or 1x12 arrays in a common cathode configuration, with 250m pitch between each channel, for up to 100gbps applications. Either an onchip or offchip fuse used in series or in parallel with the vcsel that provides a visual indicator that the device has been subjected. A 4 x 8gbps vcsel array driver asic and integration with a. Optimizing 10gbps vcsel for realworld laser driver in parallel optical transceiver. Capacitively coupled cmos vcsel driver circuits for. This permits directly observing differences between the driving and the detected pulses. Evolution of vcsel based ois towards 100 tbps ag gregate capacity through highe r speed optoelectronics and electronics and the use of electronic compensation tec hniques, higher order modula tion formats and sdmwdm. Emcores hou gave a paper on the companys vcsel arrays, which together. Emcore, with our systron donner inertial products, is one of the largest inertial navigation providers in the industry, offering a complementary suite of itar free solutions. Therefore characterization of vcsel power, beam profile, noise, etc.

Pdf optimizing 10gbps vcsel for realworld laser driver in. The device can also be laid out into a linear 1x4, 1x8, or 1x12 array in common cathode configuration with 250m pitch between each channel for up to 120gbps applications. Avagos industryleading 25g vcsel shipment surpasses 1 million channels. Simplified block diagram of the onet1191v 2 submit documentation feedback. Highpower vcsel arrays solid state lasers and laser. The vcsel and ic driver were codesigned to match inputoutput parasitics for 3 gbs operation at low bias levels. In this paper, we summarize the recent vcsel development effort at emcore. Coherent 2dimensional vcsel arrays university of illinois. Max3735a laser driver output configurations, part 4.

Flip chip vcsel arrays on transparent substrates flip chip vcsel arrays on transparent substrates gregory, bryan 20050314 00. Thermal management technology and market perspectives in power. Drawn by enchanting visions of telecom delights, 10nm vertical cavity surfaceemitting lasers vcsels have begun the parade to market this year with monthly technology development announcements. Schematics of vcsel array this circuit contains an array of eight vcsels. Highpower vcsel arrays flirs proprietary verticalcavity, surfaceemitting laser vcsel technology is ideal for illumination applications, producing unmatched lowspeckle and uniformillumination quality. A design device and method of manufacturing a vertical cavity surface emitting laser with a visual indicator for determining exposure to electrostatic discharge esd or electrical overstress eos. We will report the performance of emcores 14gbps vcsel for the new fibre channel application. Vcsels can be packaged in smd like leds or in to46 package.

The slope efficiency of a vcsel is generally higher than that of an edgeemitting laser. Evolution of vcselbased ois towards 100 tbps ag gregate capacity through highe r speed optoelectronics and electronics and the use of electronic compensation tec hniques, higher order modula tion formats and sdmwdm. The optical signals are converted to electrical signals using an emcore gaas pin photodetector array, along with a multilane transimpedance amplifier and are retimed and delivered to the host. Figure six shows a typical transient response of a 2d vcsel array driven with a commercial laser driver from ixsys. Additionally, vcsels are often used in pulsed mode.

New high speed vcsel product development at emcore. Pdf new high speed vcsel product development at emcore. Payment by credit card visa mastercard amex name of the card holder. Vcsel reliability in atlas twepp 2011 vcsel reliability 21 detector vcsel type manufacturer package hermetic atmos number failures pixel ondet. Three fast switches are controlled independently via ttllvds inputs. Optimizing 10gbps vcsel for realworld laser driver in. The device provides a twowire serial interface which allows digital control of the modulation and bias currents, eliminating the need for external components. The focus of this effort is on performance, reliability and manufacturability.

New high speed vcsel product development at emcore chuan xie b, neinyi li a, chun lei b, xinyu sun a, wenlin luo a, livia zhao a, chris helms a, chiyu liu a, dan jessen a and rich carson a. The package inductance and capacitance typically dominate the pulse performance. Vertical integration within avago technologies enables the specialized design of the vcsel, optics and ic laser driver to meet these requirements. The electrical resistance of the 2d array is significantly less than 1ohm, and the total capacitance will be less than a few pf when forward biased. Capacitivelycoupled cmos vcsel driver circuits ieee xplore. A vcsel array is usually hermetically sealed in a package with an optical element. The parameters scale with the dimensions of the vcsel and therefore the physical origin proposed above seems reasonable. In this talk, we present emcores recent effort to optimize the 850nm 10g vcsel array for the real world laser drivers used in parallel transceivers and active cables. Depending on the vcsel array, this is equivalent to pulse powers of up to 10 w. A custom built 12channel laser driver was used to individually. High speed vcsels and vcsel arrays for single and multicore. The optical signals are converted to electrical signals using an emcore gaas pin photodetector array, along with a multilane transimpedance.

For the last couple of years, the optically pumped design by gore photonics lompoc, ca has had the 10nm limelight all to itself see laser focus world, september 1998, p. Vcel makers storm 0nm telecom castle laser focus world. The vcsel current is determined by the voltages at pins cix. In this tutorial, we demonstrate the simulation of a vcsel array circuit that contains an array of vertical cavity surface emitting lasers vcsel which exhibits temperature dependent effects. The hfe4080321 is a high radiance vcsel designed to convert electrical current into optical power that can be used in fiber optic communications and other applications.

Sinica nodry 8200 1% mainly infant mortalities sctpixel off. Progress on highspeed 980 nm vcsels for shortreach. Us20060274799a1 vcsel semiconductor with esd and eos. Recently, vcsel arrays defined by introducing an etched photonic crystal phc into the top facet 5 or with multiple implantation apertures 6 have demonstrated coherently coupled inphase operation.

The last driver, receiving the differential outputs of pre drivers, adopts the singleend, opendrain structure to enable the dc coupling between the vcsel and the driver for the array application. Emcore develops advanced chip and component level solutions for nextgeneration broadband, 5g wirelessdas, clouddata center and lidar applications. Experimental demonstration of low jitter performance and high reliable 1060nm vcsel arrays for 10gbpsx12ch optical interconnection. Application note an2109 high power vcsels for gesture. Horowitz, highspeed transmitters in 90nm cmos for highdensity optical interconnects, esscirc, 2006. A range of vcsel vertical cavity surface emitting laser laser diodes are supplied featuring narrow linewidths vcsel driver ic. Vcsel measurement solutions vertical cavity surface emitting lasers vcsels are a type of semiconductor laser diode. We will also present the work on manufacturing both singlet and various vcsel arrays, with performance up to 10gbps, using a universal mask set to.

Pdf optimizing 10gbps vcsel for realworld laser driver. Power accounting for a 4 x 25 g vcsel based link asic chip quadcdr driver array board quadcdr board asic chip tia array rx function component power consumption rx transimpeanceelectrical tia a rx signal amplification tia b rx clockdata revcovery cdr y rx electrical equalization for board cdr x vcsel array mm fiber pin array. It consists of an array of vertical cavity surfaceemitting lasers vcsels on the transmission end and an array of photodiodes at the receiving end of fiber optics. Modern parallel shortreach optical transmitters use linear vcsel arrays, usually of four or twelve elements. Low random failure rate to achieve long life of 12 channel monolithic array. The hxt5004a vcsel driver array is a key component for compact, robust, lowpower optical transmitter modules. Jul 11, 2018 order form vcsels technology, industry and market trends shipping contact first name. In this talk, we present emcores recent effort to optimize the 850nm 10g vcsel array for. Figure 2 shows a driver module like the above as a sandwich assembly with an integrated ichv laser driver and vcsel array. The vcsel driver consists of an equalizer, a highspeedcurrent modulator, a modulation current generator, poweronreset circuitry, a twowireinterface and control logic block, a bias current generator and automatic power control loop, and an analog reference block. Wo2003000019a2 integrated photodetector for vcsel feedback.

The design is an upgraded version of a similar asic operating at 5 gbs, fabricated in a nm cmos process. It combines the supply of bias and modulation current without the conventional extra biascurrent circuit, and deliberately designs the load of. Vcsel, vcsel array, vcsel model, vcsel driver, 14gbps, reliability, wafer burnin. Vcsel array driver asic with sufficient radiation hardness to survive in challenging hep deployments. Investigations into matrixaddressable vcsel arrays 65 investigations into matrixaddressable vcsel arrays a. Helms et al, reliability of oxide vcsels at emcore, proceedings of spie, 2004. Vcsel driver onchip control bits for testing figure 3. As a first step in this direction, we have designed a vcsel array driver asic for operation at 5 gbs.