The Optics Side of the CO2 vs Fiber Laser Discussion

Laser Cutter

There are a variety of articles that you can find on the web that discusses the comparisons of the co2 laser cutter performance to the fiber content laser. It has been covered by lots of well-respected industry publications. There is no longer a discussion about if dietary fiber can compete with CO2. Some of the OEMs have already reached the tipping point and are selling more fiber lasers than CO2.

Sales pitch aside

Putting the sales pitch apart that the fiber content is better in providing light than a CO2 laser, let us break that right down to optical components. The CO2 laser has a series of optics. Some in the resonator which create the power plus some in the beam delivery system which changes the phase of the beam before the beam hits the ultimate optic, the laser reducing lens.

Fiber Laser Machine Can Be Solid State with Diodes or Disk

The dietary fiber laser machine can be stable status with diodes or disk or using the newer style large function area (LMA) or even continuous-wave single-transverse-mode power. The truth is that all the optics are positioned in the cutting brain only. No mirrors, result couplers or drinking water cooled copper in these machines.

However, and it is a big “but”…the little-discussed issue is the fact that if the CO2 laser must maintain a clean environment to perform better, the fiber laser must be maintained clean on a whole new degree of spotlessness.

CO2 laser a little dirty. A fiber lens will not

The co2 laser cutterwill work if it is a little grubby. A fiberlens will not. A particulate, which is smaller when compared to a virus microbe, will end the life span of the fiberslens. Associated with, is that you are by using a different light influx size. CO2 is in the IR (infrared) range. Fiber content is in the noticeable light range.

To be able to assist in keeping the laser cutter machine in the fiber machine clean, you must use a protecting window. The very best protective windows are made of fused silica and have an AR (anti-reflective) covering on them. This enables the beam to pass through from the zoom lens to the part you are chopping, but it stops debris or dirt and grime contaminants from getting back on to the lens.

OEMS of Fiber Lasers Kept Increasing Power

As the OEMs of dietary fiber lasers stored increasing ability, another major difference became evident. When you’d a fiber content laser at 1K or 1.5K, the end user could easily change a zoom lens. However, once you started out upping the energy, to 3K and 4K the tires fell off of the wagon so to speak. Suddenly the end users were going through scores of lenses.


To make the kind of changes that you need to cut different kinds of material, the beam would have to be extended. So collimating optics were added into the cutting brain of the fiber laser. Again the issue only became exacerbated by this addition. More optics that require protection!

All this boils down to two major factors, quality and cleanliness.

There is no replacement for quality. Layer quality is as different as the firms that make them. Making a good coating is part technology and part enchanting. It requires lots of experience to get it right. Testing and continually enhancing the process has made Ophir an innovator in the covering industry for optics in lasers and infrared optics for evening eye-sight and a million other optical tasks worldwide. The laser lens for the fiber content machines is absolutely the best laser cutter machine on the market.

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