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Laser beam defect

Noncasltu

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Aug 9, 2019
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hello. I faced problem with microchip laser. I used 1 cm nd yag laser crystal with passive cryag modulator. End pump configuration was used for experiment. I'm getting laser beam, which have extra intensity on the side of the beam ( in picture its marked as a red circle). Why such thing is happening? Could it be that pump diameter is much bigger than a stable mode in laser crystal? Thanks!
 

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paul1598419

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Sep 20, 2013
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Except for not trailing off as fast as you would like, it looks to have a very Gaussian beam. Why is this small thing a problem for you?
 

Noncasltu

New member
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Aug 9, 2019
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Except for not trailing off as fast as you would like, it looks to have a very Gaussian beam. Why is this small thing a problem for you?
Well, it doesn't look ok for me, and i would like it to be exact as gaussian beam. But i'm not sure why its happening like that. Does any one know why its happening? Or know literature where i could find information...
 







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