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1.2W DIY 445nm in Spyder II host

jayrob

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Wow that turned out nice... :gj:

I really like your video demonstrations and other pictures...

Hemlock_Mike, it heatsinks well because it's a massive heatsink! It is about 2" long, and about an inch in diameter!
 

DTR

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LF ---
There are sooo many variables in this that who cares???:) Diode efficiency appears to peak around 20.5% and the driver is your guess. This is a hobby and there is no real correlation between meters and 10% would be good.
It is hard for me to believe that you get that power for almost one minute in "hot conditions" when I'm using TEC to get almost there.
We know that all LD's are not the same so keep going.....

HMike

I'm on my 5th Diode but only toasted two. Yours must like it hothothot!!!!
Hey Hemlock I don't know if this helps you but I can run mine at 1.5A which should be over 1.5W for at least 90 seconds. Have not tried it any longer than that because I can start to feel the heat from the driver in the handle of the host and I dont want to push it.
Here is a video of it running for 60 seconds stable.

VIDEO
Yfrog Video : yfrog.com/3q15wburningwoodz - Uploaded by dtr11


Here is the heat sink used for the driver.
http://laserpointerforums.com/f51/tutorial-3405-build-tips-50930-2.html#post752048

P.S. Laser_freek that is the sweetest host used for these I have seen yet plus you reworked something old into something new +1 rep.:drool:
 
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Thanks guys. I'm glad you like it :D
I was going to add some more beam shots, but both of my 18650 batteries ran out of juice, and my DSD charger suddenly stopped working. :wtf: I'll take some more beam shots once my AW batteries + Pila IBC charger arrive in the mail.
 

lasersbee

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NIce 445nm Build...:gj:

When you get your Batteries/Charger... could
you make a video of your LPM reading the output
of your Laser over the time you leave it on from
start to end so we can see any output power
variations over the ON time....



Jerry
 
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NIce 445nm Build...:gj:

When you get your Batteries/Charger... could
you make a video of your LPM reading the output
of your Laser over the time you leave it on from
start to end so we can see any output power
variations over the ON time....



Jerry
Definitely. Also, I've DIYed a way to log the power from the Ophir sensor and automagically turn it into a graph on my computer. I still need to debug/test my programming, but once I do I'll upload the graphs as well.
 

Hemlock_Mike

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Welcome to Class IV !!! Comments like "it should be over 1.5 Watts" are irrelevent since the beam is sooo brite that the eye can not make a scientific measurement.
Enjoy your testing but until you see smoke coming from your power test head, the data is only a guess.
Carry on ------

HMike
 
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Definitely. Also, I've DIYed a way to log the power from the Ophir sensor and automagically turn it into a graph on my computer. I still need to debug/test my programming, but once I do I'll upload the graphs as well.
AUTOMAGICALLY. lol I thought I was the only one who said this.
 
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NIce 445nm Build...:gj:

When you get your Batteries/Charger... could
you make a video of your LPM reading the output
of your Laser over the time you leave it on from
start to end so we can see any output power
variations over the ON time....



Jerry
I received my AW batteries and Pila IBC charger today. Here's a 3 minute long test:


This is usually what I get in terms of power. Sometimes it goes up to 1.3+W and settles at 1.2.

Also, I've learned that my cat likes Spyders ;)
 

jayrob

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Man these diodes are really temperature sensitive, and for it to be that stable for over 3 minutes and drop in power so slowly is a testament to a great build and a nice heatsink...

I would say that it would be similar with my new L2P kit which has a massive heatsink as well! (shameless plug) :D
 
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