CW or pulsed laser: Pulse Energy (Joules) = Average Power (Watts) * Pulse Duration (Seconds) Again, let’s use some real values and assume you are working with a CW laser that outputs 500 W. If you fire this laser at an object for exactly 5 … For a fixed average power, the higher the repetition rate, the lower the energy per pulse.As mentioned previously, the average power of your source is usually something that is given in its specification sheet.As for the amount of time that you are going to fire your laser, well, for obvious reasons, the specification sheet does not know that, unless the laser has pre-programmed pulse durations that you can use.Again, let’s use some real values and assume you are working with a CW laser that outputs 500 W. If you fire this laser at an object for exactly 5 seconds, then you have 500 W * 5 s = 2500 J.This is the total amount of energy that you directed towards this object during this long pulse.Another example: if your 500 W laser has a 200 ms pre-programmed pulse duration, that will give you 500 W * 0.2 s = 100 J of total energy.
So it costs, roughly, just under 15 cents per hour to run the laser, or $1.20 per eight hour day. Why?The main reason is simple. Two minutes are more than enough for the detector to heat up.Blocking the laser beam will let the head reach temperature equilibrium.
The sensing element behind the absorber is large and symmetrical, so use all that aperture area!
Are you wondering how to get the most accurate measurements possible from your Wonder no more!
Application Physicist Gentec-EO offers a very wide range of pyroelectric, photodiodes and thermopiles detectors in order to cover all applications and all laser specifications.If you would like to find the best Gentec-EO joulemeter for your needs, you can contact us directly or visit our You see, laser pulse energy calculation isn’t that complicated after all! Facing a hard time calculating laser pulse energy? This quick guide is here to tell you exactly how to measure laser power accurately using your Gentec-EO thermal laser power meter. Or maybe you graduated from university decades ago and simply can’t remember? This might explain why two detectors tested one after another got a different reading.The simplest way to validate your laser power detector choice is to use our If you want to go solo, then jump to next point: you will want to play safe and expand your beam though!This is the best way to ensure the heat is completely absorbed and transferred to the power meter.
Make sure you use the detector within its specifications. To increase stability, you can set a moving average period of 5 seconds to improve the performance of tests such as long time burn-in.A fairly common mistake we see is in regards to the wavelength correction factor, and how to use it at different wavelengths than 1064 nm. When the laser energy density was set at about 350 mJ/cm 2 or above, the nanoscale pit array was formed.
(wattage x power cost / 1000) x Time in hours = cost to operate the laser for one hour.
time (s) But I'm … You can’t just use any laser power … Now you know how to measure laser power like an expert in just a few simple steps.
The repeatability of our power meters is ±0.5%, so any difference from one measurement session to another that is higher than this should prompt a verification on your end.
When the laser energy density was set at about 300 mJ/cm 2, the uniformly distributed nanobump array was fabricated.
Your laser does not necessarily output the exact average power that is written in its specification sheet.
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Products If you want to do the same as we do here at Gentec-EO, then know this: when we perform a calibration for your power meter, we can wait up to 12 minutes under laser before we seal the deal.