Gases that absorb IR radiation

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The discussion focuses on identifying a gas that can effectively absorb Nd:YAG laser radiation at 1064 nm for heating purposes. Water vapor is considered a potential option, although it has limited absorption at this wavelength compared to other gases. The current method involves using a superheated nitrogen torch, which has been tested alongside other absorbents. Participants note that while a solid or liquid would provide better absorption, the requirement is specifically for a gas. Overall, water vapor remains a viable candidate despite its lower absorption efficiency.
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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