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new s06j build peaks very high

deadshadow

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hello everyone today i managed to rebuild my old 405nm bdr209 laser with an s06j diode.the build is very budget and not so awesome made like most people on the forum do.

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the diode pressed

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used some heatshrink

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put the housing inside the heatsink

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and assembled them all to the old host

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everything worked great :drool: but i got scared alot after masuring the power of it in the lpm,the driver was set at 470ma for the old bdr209 diode and was outputing 780mw.i reset the driver to 440ma for the s06j diode and used exactly the same G2 lens i had.
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wtf? 795mw out of a s06j diode at 440ma?:thinking: quickly i turned it off,i was sure that the pontetiometer moved and i was afraid that will damage the diode,i messured the current that the diode was getting and its definetly 440ma so what you guys think?i definetly dont want to kill the diode but it peaks very high althought its on the safe zone of the current....should i lower a bit the driver to around 400-420ma?

edit:also to mention that the output mesurment was in room temperature around 29c(summer)
 

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paul1598419

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This is obviously an S06J diode as it isn't a TO-38. It's a TO-18. That is high for that diode. I have one doing 700 mW. I wonder if there is a problem with your setup of your LPM.
 
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deadshadow

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What your getting matches the BDR209 at that current. Did you get it from Jordan?
https://sites.google.com/site/dtrlpf/home/diodes/bdr-209-405nm-16x-diodes
Scroll down to the test results at the current you have your driver set to.

as paul said its 5.6mm diode so its definetly not the bdr209,i bought the diode from ebay around a month ago.

This is obviously an S06J diode as it isn't a TO-38. It's a TO-18. That is high for that diode. I have one doing 700 mW. I wonder if there is a problem with your setup of your LPM.

i dont think there is a problem with the lpm because with my old bdr209 at 470ma current i was getting 775mw(which was ok) on the same lpm,you suggest to lower a bit the current?
 

paul1598419

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For the S06J diode, the maximum current is considered to be 450 mA. Mine is set there and with a G-2 lens gives ~700 mW of power out. There are some multi-mode 405nm diodes out there. Are you sure this is the S06J and not another diode? I have mine in a massive aluminum heat sink and it is still going strong after two years.
 

deadshadow

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For the S06J diode, the maximum current is considered to be 450 mA. Mine is set there and with a G-2 lens gives ~700 mW of power out. There are some multi-mode 405nm diodes out there. Are you sure this is the S06J and not another diode? I have mine in a massive aluminum heat sink and it is still going strong after two years.

yes i bought it from techood-existotem from ebay as an extracted s06j diode from bluray sled.btw i took it apart and lowered the current to 410ma and this is the output that im getting now.im definetly happy with the numbers and hope it lasts long because looks like a very eficient diode :beer:

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paul1598419

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That is very odd. This diode shouldn't be able to produce that much power at 410 mA. That would make it the most efficient S06J anyone has seen around here. An amps to watts ratio of 0.56. Are you using a G-2 or comparable lens? At best this ratio shouldn't get below 0.63.
 
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badboybilly

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Looks like a good average output for the SO6J to me,

There is also a 206 that is 3.8mm that does very similarly to the SO6J I believe it is a BDR206. Anyway since your S06J is 5.6mm diode I believe it has a bit more mass for heat
Dissipation, I'm sure it will be fine, they are very cheap now!


http://laserpointerforums.com/f38/tank-007-bdr206-97079.html



And here is the same 3.8mm BDR206. Done just know with a peak of 830mw with the nano witch is 500ma or 550!
 

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deadshadow

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That is very odd. This diode shouldn't be able to produce that much power at 410 mA. That would make it the most efficient S06J anyone has seen around here. An amps to watts ratio of 0.56. Are you using a G-2 or comparable lens? At best this ratio shouldn't get below 0.63.

yeah im using a G2 lens and it doesn't looks right to me either but i have checked everything,the testing and mesurments are all the same as the previous bdr209 diode i had(same driver,multimeter,lpm and lens) so im sure it is a very efficient diode :)
Looks like a good average output for the SO6J to me,

There is also a 206 that is 3.8mm that does very similarly to the SO6J I believe it is a BDR206. Anyway since your S06J is 5.6mm diode I believe it has a bit more mass for heat
Dissipation, I'm sure it will be fine, they are very cheap now!

yea they are indeed got cheaper. i remember the old BDR206 but if i remember well after testing the s06j was a bit better so everyone was getting the s06j's

http://laserpointerforums.com/f38/tank-007-bdr206-97079.html



And here is the same 3.8mm BDR206. Done just know with a peak of 830mw with the nano witch is 500ma or 550!

very good numbers for the bdr206 for sure,i guess it is at 550ma but if by any chance it draws 500ma its an awesome diode too,i bet if i set the driver to 500ma the diode i got will hit over 900mw but i dont want to lose it :whistle:
 
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deadshadow

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double post for something i figured

after the daily use of the laser i figured that yes this is a very efficient diode but at the same time it has probably very low wavelengh compared to other 405nm diodes.(thats looks right because i remember i read somewhere that generally the diodes that are less efficient are produce higher wavelenghs)

if i compare it with the old bdr209 diode while both have almost the same burning power the bdr beamshots was alot brigher than this s06j,the beam from this looks deeper violet.i dont have a specrometer but i remember a thread about spectroed bdr209's and some of them were as high as 412nm.my bdr was also abit inefficient so my bet is that it was around lets say 411nm and new s06j is around 405 or even a bit less.
i thought to let you know my thoughts and please correct me if im wrong :)
 
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Merpie101

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oof i didnt think bdr209s went that high... i hope i get lucky and get a low wavelength one when im ready for my next project
 

paul1598419

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First of all, it isn't a double post unless you made it on the same day. Secondly, it is most likely a very efficient diode if it is putting that out at decreased current. Lastly, I can't speak to the WL as you would need to measure that.
 

deadshadow

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oof i didnt think bdr209s went that high... i hope i get lucky and get a low wavelength one when im ready for my next project

why you want a low wavelengh one?in my experience with the 2 diodes i compared both are definetly purple-violet,only beam visibility(and the color of the beam alitle) changes.
First of all, it isn't a double post unless you made it on the same day. Secondly, it is most likely a very efficient diode if it is putting that out at decreased current. Lastly, I can't speak to the WL as you would need to measure that.

really i can repost somemething even if i was the last one i posted at different day and its ok?

but the general rule is that the inefficient diodes are produce higher wavelenghs right? i know that i cant be sure without measurement but i know that the beams are different.
 
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badboybilly

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double post for something i figured

after the daily use of the laser i figured that yes this is a very efficient diode but at the same time it has probably very low wavelengh compared to other 405nm diodes.(thats looks right because i remember i read somewhere that generally the diodes that are less efficient are produce higher wavelenghs)

if i compare it with the old bdr209 diode while both have almost the same burning power the bdr beamshots was alot brigher than this s06j,the beam from this looks deeper violet.i dont have a specrometer but i remember a thread about spectroed bdr209's and some of them were as high as 412nm.my bdr was also abit inefficient so my bet is that it was around lets say 411nm and new s06j is around 405 or even a bit less.
i thought to let you know my thoughts and please correct me if im wrong :)


Yep I also remember that thread, in my opinion a 405 isn't so bright and not as noticeable as a 410 or higher, I have one that most definitely is higher and the beam is very obvious and bright it's comparable to a low power 445, These diodes spec sheet current is probably lower than what we push them witch probably contributes to the higher wavelength shift, also as they heat up wavelength will shift higher, My opinion!
 

paul1598419

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really i can repost somemething even if i was the last one i posted at different day and its ok?

but the general rule is that the inefficient diodes are produce higher wavelenghs right? i know that i cant be sure without measurement but i know that the beams are different.

Yeah, as long as it is a different day, it isn't a double post. Also, it is not etched in stone that inefficient diodes give greater WL shifts. It is only a guess made by those who have over driven the NDB7675s. To be able to produce that much power from so little driver current, this diode must be very efficient.
 




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