Lab Story: Laser Measurement System for Stability and Quality
July 7, 2021 - by Kevin Kirkham
FEATURED
The R&D lab of a large jet engine manufacturer uses a laser welding cell in order to test …
As every year – Ophir’s new 2021 catalog for laser measurement covers a wide range of laser power …
Overcoming the Challenges of Measuring High Power NIR Lasers
December 9, 2020 - by Yoni Groisman
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High power laser applications High power laser application has significantly increased in recent years due to new production …
As every year – Ophir’s new 2020 catalog for laser power measurement covers a wide range of laser …
Going to San Francisco for “SPIE Photonics West 2020”?
You wouldn’t want to miss Ophir at Booth #927! Here is why…
Can You Really Measure Laser Beam Quality (M Squared) in Real Time?
April 5, 2017 - by OphirBlog
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M-Squared is arguably the most important factor when determining the potential efficiency of your laser.
But, it can be a pain to measure. Here are 2 ways you can use that actually DON’T move the camera or the laser
This new video is a nice, short primer on Ophir-Spiricon’s new “BeamSquared,” replacing the M2-200s as the M-Squared …
When focusing a laser, or anything for that matter, there’s a handy formula that is used to calculate the focus size and position.
It is generally called the thin lens formula, and it looks like this:
What’s M-Squared, again?
If you’re not familiar with M2 already, it basically sums up your laser beam quality in a single number.
M2 takes a look at your beam caustic (the curve of the laser beam as it focuses and diverges again) and compares this to an ideal Gaussian beam caustic.
So if your beam is perfectly Gaussian, you’ll get M2 = 1. For high quality beams, M2 might be 1.1 or 1.2, for lower qualities you can get up to 3, 4 and even double digits for some low quality high power lasers.
So, how do you know what the M2 of your laser beam really is?
Let’s be honest.
We’d all just prefer that our lasers always worked exactly as they’re supposed to.
Who really wants to measure their laser, when they can just be using it instead?
However, like all processes, a laser must be controlled to be used efficiently, and it must be measured to be controlled (and used) properly.