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Old 07-05-2012, 05:10 PM #1
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Default Is this a problem? (video)

Happy with the performance of the laser. But it did not focus when the dot is moving. Why is that? Is this a problem?

My laser: 400mw 532nm DPSS laser (lazerer)



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Old 07-05-2012, 05:38 PM #2
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Default Re: Is this a problem? (video)

Looks like your Laser is Mode Hopping...

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Old 07-05-2012, 06:05 PM #3
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Default Re: Is this a problem? (video)

All the higher powered, cheap green lasers I've seen mode hope like that.

The increase, and decrease in apparent brightness of the beam is not really noticeable when focused to infinity though, so IMO not a problem.
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Old 07-05-2012, 06:07 PM #4
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Default Re: Is this a problem? (video)

That's some serious mode hopping. You have a bad battery (or driver), alignment, or the temperature is out of this laser's "comfort zone", and I am leaning to the latter. It's an old thread explaining it but the info is still good.
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Old 07-05-2012, 06:31 PM #5
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Default Re: Is this a problem? (video)

Quote:
Originally Posted by ZRaffleticket View Post
That's some serious mode hopping. You have a bad battery (or driver), alignment, or the temperature is out of this laser's "comfort zone", and I am leaning to the latter. It's an old thread explaining it but the info is still good.
I use Sanyo battery. But driver is lazerer default driver. I do not know what model driver.

mode hopping, increase in the coming days? Or Always remain so?

by the way, my laser;

http://lazerer.com/Green_Laser_Point...n_lase_pointer

Last edited by GoldPunch; 07-05-2012 at 06:34 PM.
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Old 07-06-2012, 04:21 AM #6
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Default Re: Is this a problem? (video)

You'll find that most green lasers over 100mW or so won't run in TEM00, but some other mode. This is because some other modes use the cavity space much more efficiently, so you can get more power at the expense of a weird shaped dot.
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