Cumulative Lasers

[YT2095]

Is there anyone here that knows a little about Laser behavior?

 

I have 5 lasers here, 4x 3mw and 1x 10Mw.

 

the 10mw laser will raise thermometer temp by roughly 5 degrees C, the 3mw lasers barely over 1 deg C.

 

so I focused all 4 lasers onto the same thermometer, expecting about a 4 deg C rise in temp, and I may as well have just used one? there was no significant difference????

why is that?

[blike]

I believe sayo is a laser expert

 

i personally have no idea :/

[Sayonara]

That's PHasers

[YT2095]

So do any of you KNOW why that happened (or rather didn`t)?

 

it sure beats hell outa me as to why!

[Kedas]

Well I think there should be a difference but if the temp rise of one is 1°C then you shouldn't expect that 4 will get you 4°C. Because it stops rising because the energy supplied is equal to the energy that is flowing away and the higher the temp the easier energy will flow away.

 

also how much energy is reflected and how much absorbed will also depend on the frequency and material.

[YT2095]

it was a "black body" type themocouple to a digital readout.

the 10mw worked great, a single 3 mw gives the same rise as all 4 do, just a little higher?

 

that`s what I can`t understand?

 

(also if this helps at all?. they`re all DC semiconductor lasers)