Ask someone who knows lasers for help

Hello dear friends,
I just received a mail , one customer saying that the module he received looks not as high as 200mw. I’m just wondering how to test if they are 200mw or not . For our providers say they are 200mw ones. How can I test that ,can we make a difference from their appearance ?How to test the power of the lasers . And what’s the difference of red lasers and green lasers ,and what do you guys use the different color lasers for ?
I have serched through google many times but without any good result ,hope you can help me .
Thanks in advance,
Crystal

To measure the output you would need a laser power meter, they tend to be fairly expensive though.

You can find a lot of info on laserpointerforums.
I use the 445 to kill pest in my saltwater tank

Could you provide us with a link to the product?

Unfortunately cheap green laser modules are mostly underpowered.

This one

The Saltwater tank is used to attract pest? We usually use Soap bubbles to attract the pests.
I’ve heard one the reasons that US forbidden selling lasers over 5mw is that some guys may use that pointing at planes ,that may cause some danger. I don’t know whether it is right or not.

Here’s the small laser power meter that we use. It’s very inexpensive compared to the big units that we use for calibrating lasers, but it’s usually within 5% of the big-iron meters.

PPtk

I see,how much is this ? Ship from which country?

Click on the “ORDER” Tab for pricing. You may be able to find it cheaper from resellers. Newport is based in the U.S., but again, you may be able to find a local reseller if you are not in the U.S.

The module you linked looks exactly like the DX module that I purchased about a year ago and had replaced twice. One module was very low powered compared with a 5mw module, sent it back. Second one was damaged during shipment, sent it back. Third one would not even power up, so I told DX I was not going through the hassle of sending it back. They could refund my money or forget me as a customer. They choose to forget me and (lost $46.00) I have not been back to DX.
I read several reviews about this module before buying stating that it was in the 140mw range.
Here is one that was tested. Don’t know if you are using the same supplier but thought you could use the info.

Here is a link to the member of LPF that is an engineer/designer/manufacturer of LPMs:

Here is one of his Ebay Listings Up to 2 Watts

http://www.ebay.com/itm/FREE-SHIPPING-New-2-Watt-LaserBee-A-Laser-Power-Meter-Thermopile-/150969161147?pt=US_Laser_Pointers&hash=item23267695bb

You can see why I recommend Newport. They’re one of the gold standards…

From www.bauer-electronics.com :
The 3.2 Watt Laserbee II is calibrated using a Newport Model 1825-C Laser Power Meter and Thermopile Head.

PPtk

I don’t disagree with you, but there is a bit difference in price, and she is definitely a NOOB…

Don’t disagree Flomotion - but she’s not doing this as a hobby, she’s selling these things. Businesses that are selling lasers, in my opinion, should have reliable tools to test/measure them with.

PPtk

Uncle! :8)

Yeah but it’s not like she’s selling medical devices. Her most expensive laser is $65. Not sure that warrants the gold standard LPM.

Uncle! 8)

You really don't need anything beyond a hobby grade laser power meter if you're only going to be testing basic modules, and +/- 5% does not bother you.

Those modules can be anywhere from 2mW to a little over 200mW. Most (90%+) will end up being in the 40-150mW range, not IR filtered, so to get the true accurate output, you would also need a filter to block either IR (infrared) light, or green light.

You can contact members ARGLaser, BlueFan, Justninja, and Laserbee over at laserpointerforums.com for an LPM.

If you want, you can also sent me a few free samples, and I'll be happy to test them for you :)

I would be interested in seeing a review of the 200mw laser module in this thread.

I see ,thanks very much for the information.Maybe I should find something more powerful for one of my customer say he needs something the exact power is 200mw.