Do diodes mode hop? Or just DPSS?

• Feb 1, 2008

• #1

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desslok

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I was curious, do diodes mode hop, or is it just DPSS lasers that do this? Or all lasers? Couldn't seem to find a clear answer.

 

• Feb 1, 2008

• #2

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Chad

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It's just DPSS lasers... but I can't seem to remember why. :-[ Somebody else can explain it.

 

• Feb 1, 2008

• #3

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Things

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Yep just DPSS lasers. http://en.wikipedia.org/wiki/Transverse_mode has some info on the modes, but basically its defects in the crystals, which lead to them changing with temperature.

 

• Feb 1, 2008

• #4

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likewhat

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You are talking about transverse modes, which is what the spot looks like. Diodes jump longitudinal modes all the time, you wont notice it though unless you have a very accurate way of monitoring the power or frequency.

 

• Feb 1, 2008

• #5

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wooooooolazer

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Yet another reason they need to make green diodes, no worry about getting a mode-hopping laser.

...lazer... ;D ;D ;D