I was wondering since it's water proof could I just spray some ice cold water on the host and spread it around to help the laser cool down faster. Also could i just run it for more then a minute this way and is the cooling effect bad for the diode in anyway?
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Water cooling my 400mw o-like green?
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benmwv
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Yeah I was hoping to see pics of some kind of awesome water cooler setup, but I start reading and "Can I just spray some water on it"
sampson
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wtf? :huh:
Anyway...
I wouldn't suggest water cooling in the method you describe. If you want to actively cool I'd suggest building a water or TEC cooled heatsink interface device instead of drenching the laser as I don't think this is what O-Like intended
And this would only work if the host sinks and transfers the heat quickly enough and you can manage to sink and dissipate THAT heat. Otherwise I would recommend that you stick with the duty cycle prescribed by O-like (100 on 60 off). Good luck either way.. and if you water cool that thing post some pics!
Sparkles
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It says water proof which means you can submerge it right?
The diode won't be shocked because its in the middle of a heatsink. Think of the heatsink as a buffer, it won't allow "quick" fluctuations in temperature. I think you should be more then fine with submerging the laser in cold water. I would be more worried to the veracity of the water-proofing.
Good Luck
The diode won't be shocked because its in the middle of a heatsink. Think of the heatsink as a buffer, it won't allow "quick" fluctuations in temperature. I think you should be more then fine with submerging the laser in cold water. I would be more worried to the veracity of the water-proofing.
Good Luck
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new info: if you cool it too fast the laser chip will be destroyed. Only do that if you are aware of the risks, and do not use ice with water (5ºc lol).
for other readers: never cool your aixiz/o-like module with ICE or water or anything too much cold when the diode/host himself is too hot. YOU WILL destroy the cavity/facets/laser chip.
for other readers: never cool your aixiz/o-like module with ICE or water or anything too much cold when the diode/host himself is too hot. YOU WILL destroy the cavity/facets/laser chip.
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lol you are funny. not THAT funny, but somehow funny.
I haven't killed any, just got a 5mW reddie and tried it. It works, if you froze it when it is hot it will be killed
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Direct contact may result in thermal shock if the water temperature did not bring the laser diode to ambient during the start of its operation. A decent solution would be to use something like heatpipes, which then are subjected to water flow or CPU fluid coolers, that are in constant contact with coolant before, during, and after diode operation.
Impurities in the water may cause electrolytic corrosion on electrical contacts it may have the opportunity to contact. Water droplets that fall on the lens may cause divergence issues by changing the shape of the lens. Residual water on the laser casing may permeate into internal seals and risk fogging its internals the next time you turn it on.
Personally, I'd prefer the coolant [water or glycerol] to be closed loop rather than sprayed on, but thats me, ymmv
Impurities in the water may cause electrolytic corrosion on electrical contacts it may have the opportunity to contact. Water droplets that fall on the lens may cause divergence issues by changing the shape of the lens. Residual water on the laser casing may permeate into internal seals and risk fogging its internals the next time you turn it on.
Personally, I'd prefer the coolant [water or glycerol] to be closed loop rather than sprayed on, but thats me, ymmv
Krogith
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Boo On the thread Title. Fired!!
Lame...Spray water....Hey anselm and benmwv We were Tricked!
Lame...Spray water....Hey anselm and benmwv We were Tricked!
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As everyone is telling you, this is a bad idea. I too cooled a diode (cheapie red LOC) in the freezer and killed it instantly. Reason. As the diode cools down it becomes more efficient and therefore requires less current for the same given output. My freezer made my LOC go down to a chilly -25c! Also sudden drops in temperature will crack the laser cavity in the diode.
I suggest limiting your use to the recommended duty cycle.
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Direct contact may result in thermal shock if the water temperature did not bring the laser diode to ambient during the start of its operation. A decent solution would be to use something like heatpipes, which then are subjected to water flow or CPU fluid coolers, that are in constant contact with coolant before, during, and after diode operation.
Impurities in the water may cause electrolytic corrosion on electrical contacts it may have the opportunity to contact. Water droplets that fall on the lens may cause divergence issues by changing the shape of the lens. Residual water on the laser casing may permeate into internal seals and risk fogging its internals the next time you turn it on.
Personally, I'd prefer the coolant [water or glycerol] to be closed loop rather than sprayed on, but thats me, ymmv
Yes, this is a much better idea!
Good point!
