* SECOND LPM GB * Laser Power Meter $160

Daedal · Dec 1, 2007

Possibly, but you never know what the tuning of the second filter is... and you'd need a function in there to accept the lower power at the sensor... also, I don't know how accurate the sensor would be with low input... it would have to a measure of lasers 1W+ to get a reasonable and reliable measurement

Suggest it to Tony

--DDL

Hemlock_Mike · Dec 3, 2007

Disma --

Remember also that the filter has to get rid of energy. At 10 watts --- POW

This is where the thermo style sensors start working for you.

Mike

disma · Dec 3, 2007

yep, thats right, I seriously doubt it would take that without cracking or shattering... it was just a thought.

Max

Daedal · Dec 3, 2007

Good point Mike

I'd assume you know

;D

--DDL

Kenom · Dec 3, 2007

boy I donno if even the normal thermals will handle that. I've got a coherent that would probably get eaten by 10watts.

disma · Dec 6, 2007

Any new developments on this gb yet? :-?
I think this is gonna be a great meter!

Max

Daedal · Dec 6, 2007

Nothing yet, sorry...

--DDL

DoughDTD · Dec 9, 2007

any news? haha im sorry daedal its just I'm getting SOOO anxious to get my hands on this bad boy.

-Dough

Daedal · Dec 10, 2007

Ya... they're done... and I should have them in a few days' time

Expect them VERY soon

--DDL

Aseras · Dec 11, 2007

disma said:
Just wondering, if you use 2 nd filters, can you go up to 10 watts?

Max

FWIW I just cracked my ND8 filter with the IR output of the rpl. Had it focused to a tiny tiny dot to meaure the output ( 2.8 watts 808 IR ) I heard a pop and it cracked it. so be careful and make sure if you are going high power that you diverge the light. If it's focused and the irridiance is too high, there's still the possibility of damaging the filters. It was scorching hot.

Daedal: do you have tony's info? I'm gonna have to get a new filter and possible have to send it back in to be recalibrated

disma · Dec 11, 2007

oooh! ouch! I didnt plan on aiming anything over 1 watt at it... besides my 17w died. time to build a 60watt!

Max

DoughDTD · Dec 11, 2007

awww that blows aseras...maybe when you contact him you can see if he can possibly sell you a higher grade filter, that can take even higher powered lasers so people can do things like test the IR pump diode on their lasers. Might not be a bad investment. Hope everything turns out well with your LPM.

-Dough

Daedal · Dec 14, 2007

Aseras said:
[quote author=disma link=1194557012/60#63 date=1196471906]Just wondering, if you use 2 nd filters, can you go up to 10 watts?

Max

FWIW I just cracked my ND8 filter with the IR output of the rpl. Had it focused to a tiny tiny dot to meaure the output ( 2.8 watts 808 IR ) I heard a pop and it cracked it. so be careful and make sure if you are going high power that you diverge the light. If it's focused and the irridiance is too high, there's still the possibility of damaging the filters. It was scorching hot.

Daedal: do you have tony's info? I'm gonna have to get a new filter and possible have to send it back in to be recalibrated

[/quote]

PM'ing now

--DDL

BlueFusion · Dec 14, 2007

i wouldn't put 808nm through any sort of glass to measure it. quartz glass absorbs infrared, I don't know at what point that becomes significant, but I wouldn't ever try focussing 2.5W of IR onto a single point of glass.

Daedal · Dec 14, 2007

The ND8 filter for this meter is made by Edmunds and are made for this specific purpose.

--DDL

Hemlock_Mike · Dec 14, 2007

With higher powers, I try to adjust the focus so it's about a 1/8" dot to spread out the energy over the filter and sensor.

Mike

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* SECOND LPM GB * Laser Power Meter $160