When two Lasers meet what happens

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When two lasers meet, they typically pass through each other without interaction, similar to light beams from a general electric torch. However, if matter is present at the intersection, particularly in non-linear crystals, intriguing effects can occur. Femtosecond pulses can lead to complex phenomena, which are often studied in advanced optics. The behavior of lasers in these scenarios can differ significantly from that of ordinary light beams. Understanding these interactions is crucial for applications in photonics and laser technology.
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WHat happpens when two Lasers meet,is their behavior same as when two Light beams meet that are emitted from a general Electric torch,i want to know what happens
Thanks in advance
 
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Nothing and yes.

But when matter is present at the crossing point, very interesting effects can happen, especially if we're talking about femtosecond pulses meeting in a non-linear crystal (incidently the subject of some of my graduate studies).
 
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