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Old 02-14-2011, 01:14 AM #1
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Default TEM22 Mode?

My 532nm O-Like 200mw is currently in the TEM22 mode. I am wandering what this could mean. I am suspicious of the battery, but do different modes indicate different "problems"?

Thanks for the help!


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Old 02-14-2011, 02:36 AM #2
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Default Re: TEM22 Mode?

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Originally Posted by jbrussell93 View Post
My 532nm O-Like 200mw is currently in the TEM22 mode. I am wandering what this could mean. I am suspicious of the battery, but do different modes indicate different "problems"?

Thanks for the help!
Use the Search bar, It is your friend.

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Click This Link!!! 50 mW Laser does Eye damage from his friend waving it in his face...
"Yeah you guessed it... At school.."-Wear The Proper Goggles for Your Protection-Click Here, Please READ!
Above >5mW you can damage Your Eyes with a Reflection in 1/100th of a second. It Doesn't Matter How Dim it "Looks"! It is still dangerous!
Above >100 mW you can burn your retina off any glossy surface just Reflecting The Beam off to your Eye!It's More Than Just a Mirror that you need to be Careful Of!!
And remember There is Never A Perfectly Diffused Surface, Do You want to Risk it?!

Last edited by Krogith; 02-14-2011 at 02:43 AM.
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Old 02-14-2011, 02:51 AM #3
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Default Re: TEM22 Mode?

Quote:
Originally Posted by jbrussell93 View Post
My 532nm O-Like 200mw is currently in the TEM22 mode. I am wandering what this could mean. I am suspicious of the battery, but do different modes indicate different "problems"?

Thanks for the help!

Mode shift could indicate any number of problems. I'll list a few reasons a DPSS laser could mode shift:

Insufficient pump power due to:
  • Low batteries
  • Faulty driver
  • Poor electrical contact
  • Dead/dying diode
Instability due to:
  • Excess or not enough heat
  • Crappy crystals
  • Insufficient pump power

You can troubleshoot some of these and locate the issue.
  • Try new batteries
  • Measure the current draw with a digital multimeter
  • Check electrical continuity through switches and the body
  • Try warmer or cooler start-up temperature

Addendum: Sometimes lasers just like to operate in modes other than TEM22 due to the cavity design. If it is not mode "shifting" and the laser is stable and up to spec then I wouldn't worry about it since there is nothing you can do short of tearing it apart and rebuilding it.

Last edited by RA_pierce; 02-14-2011 at 03:18 AM.
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Old 02-14-2011, 03:11 AM #4
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Default Re: TEM22 Mode?

Oh I thought he wanted to know what Tem22 Mode Meant. I didn't know his was mode hopping....
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Click This Link!!! 50 mW Laser does Eye damage from his friend waving it in his face...
"Yeah you guessed it... At school.."-Wear The Proper Goggles for Your Protection-Click Here, Please READ!
Above >5mW you can damage Your Eyes with a Reflection in 1/100th of a second. It Doesn't Matter How Dim it "Looks"! It is still dangerous!
Above >100 mW you can burn your retina off any glossy surface just Reflecting The Beam off to your Eye!It's More Than Just a Mirror that you need to be Careful Of!!
And remember There is Never A Perfectly Diffused Surface, Do You want to Risk it?!
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