Gases that absorb IR radiation

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SUMMARY

The discussion centers on identifying gases that effectively absorb Nd:YAG laser radiation at 1064 nm for heating purposes. Water vapor is highlighted as a potential candidate, although it is noted that it does not absorb as much IR radiation at this wavelength compared to other options. The current method involves using a superheated nitrogen torch, which has been tested alongside various absorbents. The consensus is that while water vapor is not ideal, it remains one of the better atmospheric gas options available.

PREREQUISITES
  • Understanding of Nd:YAG laser technology and its applications
  • Knowledge of infrared radiation absorption properties of gases
  • Familiarity with thermal transfer methods in composite materials
  • Experience with gas behavior under superheated conditions
NEXT STEPS
  • Research the absorption characteristics of various gases at 1064 nm
  • Explore alternative heating methods for glass fiber composites
  • Investigate the use of superheated gases in industrial applications
  • Learn about the thermal properties of water vapor in relation to laser heating
USEFUL FOR

This discussion is beneficial for laser engineers, materials scientists, and professionals involved in thermal management and composite material applications.

Eric Markiewicz
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Hello,

I'm looking for a gas (hopefully one that is readily available) that will absorb Nd:YAG laser radiation at 1064 nm. The purpose is to heat the gas to transmit heat into a glass fiber composite which normally does not absorb IR light.
 
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Does it have to be a gas? Water vapour is not a bad approach if it does have to be a gas.
 
Yes, it needs to be a gas. Our laser is 2kW, and we've tried other absorbents. We currently use a superheated nitrogen torch.
 
Water vapor doesn't seem to absorb much IR at 1064nm
 
Still more than (most?) other common gases. A solid or liquid would give more absorption...
 

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