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Old 02-14-2010, 10:00 PM #49
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Default Re: Another Simple Laser Power Meter

Quote:
Originally Posted by lasersbee View Post
If you want to make a LPM... save yourself some money...
the TEC is a bit too small... 0.088 " X 0.167"
That is barely large enough for a laser beam..
The Specs link are down... but at that size I don't think
there are enough PN junctions to put out any usable current..
I may be wrong...

Jerry
It's 2.2X4mm

They do loads of sizes, although hopefully I can get a proper meter and invest in a Laserbee soon enough, thank god for weekday working during holidays


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Old 02-14-2010, 10:43 PM #50
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Default Re: Another Simple Laser Power Meter

I have a dozen of these. They were made for or bought by JDSU. The packing date is 2/21/06. I think they were used to cool butterfly diodes. I do not have the tech sheet for them. They are 7mm x 14mm. They appear to be gold plated. If you think that these will work for you, I'll take $15 a piece for them, shipped.



They look like this one, only larger
http://www.shop.customthermoelectric...-9G30-20CN.htm

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Last edited by daguin; 02-14-2010 at 11:07 PM.
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Old 02-15-2010, 12:30 AM #51
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Default Re: Another Simple Laser Power Meter

Quote:
Originally Posted by Asherz View Post
It's 2.2X4mm

They do loads of sizes, although hopefully I can get a proper meter and invest in a Laserbee soon enough, thank god for weekday working during holidays
Yeah... 2.2mm X 4mm is 0.088 " X 0.167" it's on the page you linked to..
they are still a bit small...
The ones Dave has for sale look more suitable... IMO..

Jerry
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Old 02-15-2010, 08:29 PM #52
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Default Re: Another Simple Laser Power Meter

There are other sizes on that site available, $14.50 for 8x8mm in small quantities. No shipping costs included though.
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Old 02-15-2010, 10:13 PM #53
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Default Re: Another Simple Laser Power Meter

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Originally Posted by Bluefan View Post
There are other sizes on that site available, $14.50 for 8x8mm in small quantities. No shipping costs included though.
That's the closest size to what billg519 used. Thanks!
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Old 07-27-2010, 12:12 PM #54
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Default Re: Another Simple Laser Power Meter

I have been reading this thread and ordered a TEC for myself out of excitement. It was expensive, around $40 for a 6.2mm square, but I just found this other site (https://www.tetech.com/Peltier-Therm...les/Micro.html) with good prices on small TEC units. Less than $20 for some like a 4.3mm square. I don't know about shipping though. I hope this helps some of you guys.
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