GENTEC-EO Faster, smarter, tougher: new detectors for a new era of laser applications PHOTONICS+2021
s sales manager at gentek eo. Thank you for the opportunity to um to present our latest releases agenda kio. So we call this presentation faster, smarter, tougher, new detectors for a new era of laser application. Laser evolve really fast, such as our offering for measuring them. Okay, quick overview of what we do here at gentechio we’ve been around since the 1970s, providing beam, profilers power, energy meters and calibrated high power measurement for lasers, where our accredited iso 17025, meaning that we do manage around calibration processes and manufacturing uh. All on your own. All on our own, we cover pretty much all industries, lasers, uh from consumer markets, medical astix, manufacturing directed energy scientific developments. We only provide absolute measurement capabilities with nist traceability with every standard and custom solutions that we that we deliver. Okay, so three parts for this quick presentation: faster, smarter, tougher, okay, so we’ve released detectors, providing higher repetition rates for measuring the energy. The pulse to pulse energy, with pulse lasers, smarter, coming way to communicate those measurements from the probe itself to your pc, monitor interfaces tablet. Uh, smartphone and so on, which is a really convenient way to measure uh and then, tougher year after year, we offer tougher absorbers um to benefit from highest dama thresholds in laser power density and laser energy densities and i’m going to show you some of the latest Releases for for that matter, okay, a quick overview of our energy detectors so from the femtojool level up to the multi kilojoule level.
First, one, the photodiodes from the femtojool level up to let’s, say 100 nanojoules. This one is pretty um pretty low low energy power. We offer that up to one kilohertz, typically, the next one are the integrating spheres so larger our range in terms of energy from the picol jewel level, up to 20 milliliters, typically um repetition rate can be really high with those ones up to 200 kilohertz in standard That we offer with the max 6 series and then goes – we go to the power electric detectors, which is the one with one of the largest dynamic range in terms of energy levels and as well up to 10 kilohertz repetition rates, so fast repetition rates um. This is this: is one we’ve released new detectors and i’m going to spend some time more in the next slides with the qe series here, the pyrotech sensors keep in mind as well for uh, really high peak power density, lasers. Typically nuclear fusion projects. We offer single shot energy measurement capability with the calorie meters and the thermopiles we’ve released um calorie meters up to 16 kilojoules and counting we, we innovate there, a lot as well and for uh for for taking really high peak power beams. Okay, so let’s spend some more time on the qe series: the pyrolytic sensors. First, how does that work? Uh, pyroelectricity um in a nutshell, that’s a property of certain crystals to produce a state of electricity, electric polarity by a change of temperature.
So the change of temperature is brought by the least beam, the pulse of energy that that comes out of this beam, uh, the laser output. So you have a little beam hitting the surface of this pyroelectric sensor. The heat is absorbed, then. Naturally, the crystal produces a voltage that’s proportional to the amount of energy contained within the the laser pulse. Then you have an adc converting this analog signal to the to a digital signal going to the computer uh to provide a calibrated measurement. So this is a heat based process, so it has some time and duration attached to this process. Long story short the highest. The higher the energy is with your laser and the slower. The pyroelectric sensor is to produce a calibrated measurement, but one of the good really good advantages of those of these technologies. It offers a really large dynamic range that we saw from the micro jewel level up to hundreds of joules. It is broadband as well from the uv range up to 20 microns. This is really a flat kind of absorber that we use so that’s easy to calibrate. The damage thresholds are pretty high up to 16 joules per square centimeters and uh. The package is cost effective. We just need to take this detector and plug it in to monitor interface such as the maestro there or or p link, or or a u link interface, that to to get to your computer um. Some of the challenges um once again, the response time heat pace.
So they can be pretty pretty slow and the repetition rate will uh typically will be, will be in the hundreds of hertz up to one kilohertz. So we spend a lot of effort to release um, new electronics and new crystals and a way to assemble those detectors, mainly for the qe12 and the qe25 detectors. So 12 millimeter square and 25 millimeter square detectors first, one with the mb absorber with which offer really high damage ratios in terms of energy density, up to 16 joules per square centimeter and now comes up to one kilohertz capability, so 1, 000 hertz single pulse 2, Plus energy measurement capability and with the mt absorber, the metallic one, which is faster by design this one goes now to 10 kilohertz, so good flexibility for measuring your laser plus energies and now, with the new interface. The? U link to connect the probe to your computer and this one captures every pulses up to 10 kilohertz to provide once again a calibrated measurement. Okay, next uh next parts, a smarter way to communicate we’ve released for the average power measurement detector. So the termer piles we’ve released wireless capability that we call the blue, which is this little module attached to the probe, which gathers and processes the detector’s data connects via bluetooth to your smartphone tablet, pc both apple android um for the for a small phone to provide A calibrated measurement with the battery life up to five continuous days and once again, not included, cost effective bike package, no need to buy an additional uh monitoring, um solution.
With this i mean an interface you go directly from from the device to your um. Your pc, for example, okay and the new releases last year, released the the high power probes with the blue capability, so that benefits love the high power applications, because you have no cable to manage. You can basically set your detector inside your safety enclosure. Um close the enclosure run your measurement and get the calibrated uh amount of watts to your um to your monitoring devices. So it’s it’s safer to operate no need to run a cable through feed through and everything and that’s once again, one less instrument to carry no interfacing box between the probe and the uh, the computer. Okay. So, like i mentioned the uh, the hp blue series, so you have the module in the bluetooth module, that’s embedded inside the casing, so slick design, operation up to 30 meters. You have as well the direct usb connection still also available for using serial command for automating. Your measurement, for example, this series goes up to 15 kilowatt of laser power in standard and up to 16 kilowatt per square centimeter of laser power density. We do offer higher than that with the gold cone kind of absorber, not the flat one that you see here and with the wireless measurement capability as well, and as always nist traceability comes with the uh. With this, these features, okay and then so tougher let’s spend some more time on the damage thresholds themselves in laser power density and lesser energy density is new detectors, we’ve released to uh to use smaller beams or higher power, not a combination of two um quick reminder: What is the damage thresholds in the so that’s for power density and energy density in watt per square centimeter or joules per square centimeter? So the damage threshold um in power density varies with the laser wavelength.
The laser average power the amount of heat that that seven, that is brought by the laser beam and the beam profile, whether that gaussian or flat top. If you have a gaussian beam, the effective power density is doubled. So we need to take that into account when we release a product and to specify the damage threshold by the way, the demo threshold that we provide with our. In our specification, there are always listis for flat top beams and you need to divide those damage thresholds by two for gaussian beams. If you have gaussian beam in your setup um and then for energy density, the damage threshold varies with wavelength, laser average power to the amount of heat, the beam profile, flat upper gaussian or super gaussian or kubenegen, and then the repetition rate and the pulse duration. So this is aspect in the in our product: documentation. Okay, so tougher laser power detectors that’s what we have released in the last couple of years: uh, integrating spheres the new up, qed series, so thermal pile detectors for measuring average power with volume absorbers a really resilient technology to take high peak power, pulse lasers. Then, in addition to the printer series, um with higher damage threshold for a handheld kind of measurement, you just place that inside of your engraving system, for example, and you get in five seconds – a calibrated, um single shot power measurement and then the hp gold series with A reflective cone for uh up to uh up to 15 kilowatt, as we mentioned already so a quick overview technology for the integrating sphere.
You have the integrating sphere, coupled with the photodiode with the direct usb output. This is really good for integration of real time. In line power monitoring of laser system, because that goes up to nine watt of leisure, laser average power, with the benefit of the high of the the fast rust time of the photodiode, typically 200 milliseconds. So you can switch from laser to laser really fast and run. Your measurement quickly with a high damage threshold as well it’s, two kilowatt per square centimeter in laser power density. Next, one, the upqd really good for q, switch lasers, manufacturing of high energy pulse lasers, really resilient technology. You see the numbers up to 100 kilowatt per square centimeter tested up to eight joule per centimeter for 10 64 nanometers, 10, hertz, seven, nanoseconds and and up to 300 watts in terms of average power. Next one, the pronto, the print 250 w5. Once again, a really convenient tool to carry around your different lasers, this one is not actively cooled, so it takes up to it, takes five seconds to produce an average power measurement if it’s, above than that above five second measurement, it has the capability to take some More but you need to cool down the detector longer between shots feel free to to share with us your laser, specs and we’ll. Let you know which one of the in the pronto series is best adapted for your needs and um yeah what’s unique about this one.
Uh now it goes up to 100 kilowatt per centimeter of laser power density, so really tightly focused beams for measurement and the last one here so once again, the one with the gold cone taking really high power densities and really high power levels really good for fiber Lasers, burning station endurance test for hours or days for a running a lizard and see any variation in the output in standard. We do offer many custom solutions within standard of the shelf. We go up to 15 kilowatts, 80 kilowatt per square centimeter and providing low back reflection down to even less than one person backward section lamborghini profile with the tube option that you see on the right side of this uh of the slide here all right. So i hope that was a good review of our latest releases. We’Re constantly uh in in in involving in releasing new products and injecting um resources for real estate. New products so feel free to share about your application and how we can help with your uh laser specs to go to our booth and let’s let’s share about your needs all right.